CN105639403A - Food defrosting method and food defrosting system of heating cooker - Google Patents

Abstract

The present invention proposes a food thawing method for a heating cooker and its system, wherein the method includes the following steps: an acquisition step of heating and thawing the food to be thawed, and acquiring the first detection value output by the temperature sensor within a first predetermined time period and the second detection value output by the temperature sensor in the second predetermined time period; the thawing component determination step, according to the time difference between the first detection value, the second detection value and the first predetermined time period and the second predetermined time period, determine to be The component coefficient of the thawed food is to determine the component of the food to be thawed according to the relationship between the pre-acquired component and the component coefficient; and the control step is to determine the heating time to thaw the food to be thawed according to the component of the food to be thawed. According to the method of the embodiment of the present invention, the food can be thawed effectively and automatically, so as to be convenient for users.

Description

Food thawing method and system for heating cooker

technical field

The invention relates to the technical field of heating cookers, in particular to a food thawing method for heating cookers and a system thereof.

Background technique

Conventional heating cookers use various sensors such as temperature sensors and weight sensors to determine or detect the weight of food, and to control the temperature rise and the amount of steam inside the heating cooker. That is, the food is heated and cooked according to the information acquired by the sensor.

Conventional microwave ovens are mainly of the turntable type, and this type of microwave oven is provided with a turntable for placing food and measuring the weight of the food. However, in recent years, flat-panel microwave ovens without a turntable that effectively utilize the space in a heating chamber have appeared. Compared with previous microwave ovens, it is more difficult to weigh flat-panel microwave ovens. Users need to set the weight in advance when cooking. Therefore, it is necessary to set up corresponding control methods and operation buttons, which makes the cost relatively high, and the operation is also relatively cumbersome. Users need to manually input Information such as thawing components, and when the thawing components are not clear, it is easy to have insufficient or over-thawed situations, and "automation" cannot be realized.

Contents of the invention

In view of this, the embodiments of the present invention provide a food thawing method and system for a heating cooker, as well as a heating cooker, which can effectively thaw food automatically and be convenient for users.

Embodiments of the present invention provide a food thawing method for a heating cooker on the one hand, including the following steps: an acquisition step, heating and thawing the food to be thawed, and acquiring the first detection value output by the temperature sensor within the first predetermined time period and The second detection value output by the temperature sensor within the second predetermined time period; the step of determining the thawing component, according to the first detection value, the second detection value and the interval between the first predetermined time period and the second predetermined time period time difference, determine the component coefficient of the food to be thawed, and determine the component of the food to be thawed according to the relationship between the pre-acquired component and the component coefficient; and the control step, determine the heating according to the component of the food to be thawed Time to thaw the food to be thawed.

According to the method of the embodiment of the present invention, by obtaining the relationship between the defrosted food of different components and the component coefficient, it is unnecessary to manually input or manually estimate the component, and the food can be effectively thawed to achieve automation, which is convenient for users.

In one embodiment of the present invention, the component coefficients of the different components are obtained through the following steps: heating and thawing the known different components of the food respectively, and obtaining the temperature of the different components of the food within the third predetermined time period The fourth detection value output by the sensor and the fourth detection value output by the temperature sensor within the fourth predetermined time period, according to the third detection value, the fourth detection value and the third predetermined time period and the fourth predetermined time period The time difference between the segments determines the component coefficients corresponding to each of the known distinct components, and the relationship between the components and the component coefficients is calculated. By calculating the relationship between the components and the component coefficients, the defrosted components can be simply obtained during heating and defrosting, and defrosting can be effectively performed, which is convenient for users to use.

In an embodiment of the present invention, the heating cooker suspends heating work during the first predetermined time period and the second predetermined time period. By suspending heating during this period of time, external noise can be reduced for temperature sensor data collection, ensuring the accuracy of data.

In one embodiment of the present invention, in the control step, the heating time is determined according to the weight of the food to be thawed by using the following formula, so as to heat and thaw the food to be thawed,

T=M×X+Y,

Wherein, T represents the heating time, M represents the weight of the food to be thawed, and X and Y are constant coefficients. The heating time can be quickly and easily obtained through a large amount of data, and the defrosting can be effectively performed, which is convenient for users to use.

In one embodiment of the present invention, the relationship between the components and the component coefficients is expressed by the following formula,

M=A×k+B,

Wherein, M represents the component, A and B represent constant coefficients, and K represents the component coefficient. The above-mentioned obtained through a large amount of data can quickly and easily obtain the unfreezing component, can effectively unfreeze, and is convenient for users to use.

In one embodiment of the present invention, a plurality of detection values of the temperature sensor are obtained within the first predetermined time period, and the average of the detection values is used as the first detection value, and/or in the second A plurality of detection values of the temperature sensor are obtained within a predetermined period of time, and an average of the plurality of detection values is used as the second detection value. By taking the average value, the influence of noise can be reduced to ensure the accuracy of the data.

In one embodiment of the present invention, the first to fourth predetermined time periods are set at a stage when the food to be thawed tends to rise in temperature. By selecting an obvious stage as the data acquisition time period, it is easy to compare the component coefficients and the error is small.

In an embodiment of the present invention, the time difference between the first predetermined time period and the heating start time matches the time difference between the third predetermined time period and the heating start time, and/or the first The time difference between the second predetermined time period and the heating start time matches the time difference between the fourth predetermined time period and the heating start time. By matching the data acquisition time when determining the relationship between the components and the component coefficients with the data acquisition time when determining the unfreezing components, the validity and consistency of the data can be guaranteed, so that the unfreezing can be performed accurately.

Another aspect of the embodiment of the present invention provides a food thawing system for a heating cooker, including: an acquisition module, configured to heat and thaw the food to be thawed, and acquire the first detection value output by the temperature sensor within the first predetermined time period and the second detection value output by the temperature sensor within the second predetermined time period; the defrosting component determination module is used to determine the first detection value, the second detection value and the first predetermined time period and the second predetermined time The time difference between segments determines the component coefficient of the food to be thawed, and determines the component of the food to be thawed according to the relationship between the pre-acquired component and the component coefficient; and the control module is used to determine the component of the food to be thawed according to the The portion of the food determines the heating time to thaw the food to be thawed.

According to the system of the embodiment of the present invention, by obtaining the relationship between the defrosted food of different components and the component coefficient, there is no need to manually input or manually estimate the component, and the food can be effectively thawed to realize automation, which is convenient for users.

In one embodiment of the present invention, it also includes: a component coefficient acquisition module of different components, which is used to separately heat and defrost food with known different components, and respectively obtain the food with different components within the third predetermined time period The fourth detection value output by the temperature sensor and the fourth detection value output by the temperature sensor within a fourth predetermined time period, according to the third detection value, the fourth detection value and the third predetermined time period and the fourth predetermined time period The time difference between the time periods determines the component coefficients corresponding to the respective known different components, and the relationship between the components and the component coefficients is calculated. By calculating the relationship between the components and the component coefficients, the defrosted components can be simply obtained during heating and defrosting, and defrosting can be effectively performed, which is convenient for users to use.

In an embodiment of the present invention, the heating cooker suspends heating work during the first predetermined time period and the second predetermined time period. By suspending heating during this period of time, external noise can be reduced for temperature sensor data collection, ensuring the accuracy of data.

In one embodiment of the present invention, the control module determines the heating time according to the weight of the food to be thawed by using the following formula, so as to heat and thaw the food to be thawed,

T=M×X+Y,

Wherein, T represents the heating time, M represents the weight of the food to be thawed, and X and Y are constant coefficients. The heating time can be quickly and easily obtained through a large amount of data, and the defrosting can be effectively performed, which is convenient for users to use.

In one embodiment of the present invention, the relationship between the components and the component coefficients is expressed by the following formula,

M=A×k+B,

Wherein, M represents the component, A and B represent constant coefficients, and K represents the component coefficient. The above-mentioned obtained through a large amount of data can quickly and easily obtain the unfreezing component, can effectively unfreeze, and is convenient for users to use.

In one embodiment of the present invention, the acquisition module performs the following steps: acquire multiple detection values of the temperature sensor within the first predetermined time period, and use the average of the multiple detection values as the first detection value, And/or acquire multiple detection values of the temperature sensor within the second predetermined time period, and use the average of the multiple detection values as the second detection value. By taking the average value, the influence of noise can be reduced to ensure the accuracy of the data.

In one embodiment of the present invention, the obtaining module further performs the following steps: the time difference between the first predetermined time period and the heating start time, and the time difference between the third predetermined time period and the heating start time match, and/or the time difference between the second predetermined time period and the heating start time matches the time difference between the fourth predetermined time period and the heating start time. By matching the data acquisition time when determining the relationship between the components and the component coefficients with the data acquisition time when determining the unfreezing components, the validity and consistency of the data can be guaranteed, so that the unfreezing can be performed accurately.

In one embodiment of the present invention, the first to fourth predetermined time periods are set at a stage when the food to be thawed tends to rise in temperature. By taking the average value, the influence of noise can be reduced to ensure the accuracy of the data.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural view of a heating cooker according to an embodiment of the present invention;

Fig. 2 is a structural diagram of a heating cooker according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a heating cooker heating food according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of a heating cooker heating food according to an embodiment of the present invention;

Fig. 5 is a flow chart of the food thawing method of the heating cooker according to the embodiment of the present invention;

Fig. 6 is the voltage output graph of the infrared sensor when the minced meat of 200g and 400g is heated and thawed;

Fig. 7 is a detailed analysis diagram of the voltage output of the infrared sensor when 200g and 400g of minced meat are heated and thawed;

8 is a block diagram of a food thawing system of a heating cooker according to an embodiment of the present invention; and

Fig. 9 is a graph of data collection for heating and thawing food by the heating cooker according to the embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Fig. 1 is a schematic structural view of a heating cooker according to an embodiment of the present invention. Fig. 2 is a structural diagram of a heating cooker according to an embodiment of the present invention. As shown in Figures 1 and 2, a heating cooker 1 includes: a heating chamber 2 for heating food, an openable and closable oven door 3, and a heating unit for heating food. The heating unit is mainly composed of a magnetron 5 and a heating tube. The magnetron 5 heats the food through high-frequency energy waves. not specifically shown). The bottom is provided with a platform 4 for placing food, and the platform 4 is made of tempered glass, and the heating pipe is arranged under the platform 4 . In addition, a sensor 6 for detecting the temperature of food is provided on the side of the heating chamber 2, and the sensor 6 is fixed by a pipe 7 and covered by a resin case.

Fig. 3 and Fig. 4 are schematic diagrams of heating food by a heating cooker according to an embodiment of the present invention. As shown in Figures 3 and 4, the sensor 6 has a specific line-of-sight angle (as shown by 8 in Figure 3), so it can observe the temperature of the food placed within the line-of-sight angle range. An operation unit 9 for performing various operations on the cooking device 1 is provided on the front of the cooking device 1 , and a display unit 10 for displaying operations, cooking status, time, etc. is provided inside or near the operation unit 9 . The operation unit 9 has a processor for controlling the heating cooker 1, and can select an appropriate heating time according to the user's operation or the information obtained by the sensor 6, so as to cook food.

Example 1

Fig. 5 is a flowchart of a food thawing method of the heating cooker according to the embodiment of the present invention. As shown in Figure 5, the food thawing method of the heating cooker of the embodiment of the present invention comprises the following steps:

S101, heating and thawing the food to be thawed, and acquiring a first detection value output by the temperature sensor within a first predetermined time period and a second detection value output by the temperature sensor within a second predetermined time period.

Fig. 9 is a graph of data collection for heating and thawing food by the heating cooker according to the embodiment of the present invention. In order to reduce the impact of the heating of the heating cooker on data collection, the heating cooker suspends the heating work during the first predetermined time period and the second predetermined time period. That is, the first predetermined time period and the second predetermined time period may be the first 20 seconds, the second 20 seconds, or the third 20 seconds in FIG. 9 .

S102, according to the first detection value, the second detection value and the time difference between the first predetermined time period and the second predetermined time period, determine the component coefficient of the food to be thawed, and according to the relationship between the pre-acquired component and the component coefficient, To determine the amount of food to be thawed.

S103. Determine the heating time according to the amount of the food to be thawed to thaw the food to be thawed.

According to the method of the embodiment of the present invention, the food can be thawed effectively and automatically, so as to be convenient for users.

The method of the present invention will be further described in detail below.

In the embodiment of the present invention, 200g and 400g of minced meat were respectively used as thawed food for heating and thawing. After the heating starts, turn on the cooling fan outside the heating chamber to make the temperature inside the heating chamber even, so as to reduce the error when detecting the temperature of the frozen minced meat. For example, within 10 seconds after pressing the heating button, only the cooling fan and The infrared sensor operates, and the output voltage of the infrared sensor within the 10 seconds is acquired as the minimum value Vs. If Vs is greater than a certain value, it is determined that the object to be heated is not a frozen product, and the heating is stopped and a prompt message is issued, so as to prevent users from using it incorrectly.

In the present invention, the graph shown in Figure 6 is obtained by recording the output voltage and time of the infrared sensor when 200g and 400g of minced meat are heated and thawed. Among Fig. 6, 16a is the graph of heating and thawing 400g minced meat, and 16b is the graph of heating and thawing 200g of minced meat. As shown in Figure 6, the output voltage of the infrared sensor when 200g of minced meat is heated and thawed changes faster than the output voltage of the infrared sensor when 40g of minced meat is heated and thawed.

In an embodiment of the present invention, foods with known different quantities are heated and thawed separately, and the fourth detection value output by the temperature sensor within the third predetermined time period and the temperature within the fourth predetermined time period of the food with different quantities are respectively obtained. The fourth detection value output by the sensor, according to the third detection value, the fourth detection value and the time difference between the third predetermined time period and the fourth predetermined time period, determine the component coefficient corresponding to each known different component, and calculate the component Relationship with component coefficients. The specific process is as follows:

Fig. 7 is a detailed analysis diagram of the voltage output of the infrared sensor when 200g and 400g of minced meat are heated and defrosted. Usually, when heating and thawing, in order to prevent uneven heating or local overheating, heating units such as magnetrons will be turned on or off in a predetermined cycle, that is, heating for a predetermined time and then stopping for a certain period of time, and then heating for a predetermined time, repeating this process process. In the embodiment shown in FIG. 7 , the magnetron is heated for 9 seconds, then stopped for 20 seconds, then heated for 9 seconds, and then stopped for 20 seconds, and the process is repeated. In order to prevent the noise caused by the heating of the heating unit such as the magnetron to the temperature acquisition, in the embodiment of the present invention, the temperature of the minced meat is collected within 20 seconds after the magnetron stops heating, so as to obtain the unfreezing temperature according to the collected sensor output voltage. Relationship between components and component coefficients. After detecting and calculating a large amount of data, the following relational formula M=A×k+B... (Formula 1) is obtained, where M represents a component, A and B represent constant coefficients, and K represents a component coefficient.

In one embodiment of the present invention, the average values within 20 seconds of non-action in the third and fifth cycles of the on-off action are used. The reason is that, as shown in FIG. 7 , the change trend of the output voltage curve of the temperature sensor is relatively more obvious within this time period. According to the average value obtained by the third and fifth cycle detection, the slope (that is, k) can be obtained according to the following formula:

dv/dt=(V2－V1)×100/(time difference between the 5th cycle and the 3rd cycle)

V1; (the average value of the output voltage during the OFF time of the third cycle)

V2; (the average value of the output voltage during the OFF time of the fifth cycle)

Since the voltage difference is relatively small, for the convenience of calculation and comparison, the slope is multiplied by 100 in the embodiment of the present invention.

As shown in Figure 7, the average voltage of 200g minced meat in the third cycle is 1.063V, and the average voltage in the fifth cycle is 1.118V. The average voltage of 400g minced meat in the third cycle is 1.025V, and the average voltage in the fifth cycle is 1.062V. Calculation by the above formula 1 can be obtained when 400g minced meat is heated and thawed as: 1.062-1.025)×100/58=0.06. It can also be obtained that k is (1.118-1.063)×100/58=0.09 when 200g of minced meat is heated and thawed. In order to facilitate the operation and the computing power of the processor, k can be multiplied by 100 in the actual operation. At this time, A calculated according to Formula 1 is -66.7, and B is 800. Therefore, Equation 1 can be expressed as M=-66.7*k+800.

In one embodiment of the present invention, on the basis of the above-mentioned determined components, by heating and thawing foods of different components and recording their heating time and components, the following relationship between thawing components and heating time can be obtained, T=M×X+Y ···(Equation 2), where T represents the heating time for the thawed food, M represents the weight of the food to be thawed, and X and Y are constant coefficients. In the embodiment of the present invention, in order to reduce errors and noises, methods such as removing the average value of the above calculation results may be used.

In one embodiment of the present invention, the time difference between the first predetermined time period and the heating start time matches the time difference between the third predetermined time period and the heating start time, and the second predetermined time period matches the heating start time The time difference between, and the time difference between the fourth predetermined time period and the heating start time match. For example, in the above embodiment, the time periods used to determine the relationship between the components and the component coefficients are the 3rd and 5th cycles, then the time period collected when it is determined that the food to be thawed is heated and thawed is also in the The time period of the 3rd and 5th cycle when the food is heated and thawed. The validity and consistency of the data can be ensured by adopting a matching time period when determining the relationship between the component and the component coefficient and when heating and thawing the food to be thawed, so that the thawing can be performed accurately.

In one embodiment of the present invention, after determining the relationship between different components and the component coefficient k, in the subsequent heating and thawing, as long as the component coefficient k is determined, the component to be thawed can be obtained, so that the heating time can be determined according to formula 2 , to heat defrost the defrosted food.

In one embodiment of the present invention, when the food to be thawed is heated and thawed, the output voltages of the infrared sensors of the food to be thawed in multiple intervals where the magnetron stops working are obtained, and the average voltage in each interval is calculated, And the time difference of the detection point corresponding to the connected average voltage. In order to reduce the amount of calculation and ensure accuracy, the detection interval is the same as the detection interval when the component coefficient k is determined above. For example, detecting the third cycle, the fifth cycle, etc., may be determined by the acquisition interval when determining the relationship between different components and the component coefficient k. The variation of the output voltage is obtained through the output voltage and time of the infrared sensor, that is, the component coefficient k is obtained. For the convenience of calculation, the value of k can be set as k*100. Thus, the thawed portion can be obtained by formula 1, and the heating time can be further obtained by formula 2, so that the heating and thawing control of the thawed food can be performed.

Example 2

Fig. 8 is a block diagram of a food defrosting system of the heating cooker according to the embodiment of the present invention. As shown in FIG. 8 , the food thawing system 10 of the heating cooker according to the embodiment of the present invention includes: an acquisition module 11 , a defrosting component determination module 12 , and a control module 13 .

In one embodiment of the present invention, the acquisition module 11 is used for heating and thawing the food to be thawed, and acquiring the first detection value output by the temperature sensor within the first predetermined time period and the first detected value output by the temperature sensor within the second predetermined time period. Two detection values. The thawing component determination module 12 is used to determine the component coefficient of the food to be thawed according to the first detection value, the second detection value and the time difference between the first predetermined time period and the second predetermined time period. The relationship between to determine the amount of food to be thawed. The control module 13 is used for determining the heating time to thaw the food to be thawed according to the portion of the food to be thawed.

Fig. 9 is a graph of data collection for heating and thawing food by the heating cooker according to the embodiment of the present invention. In order to reduce the impact of the heating of the heating cooker on data collection, the heating cooker suspends the heating work during the first predetermined time period and the second predetermined time period. That is, the first predetermined time period and the second predetermined time period may be the first 20 seconds, the second 20 seconds, or the third 20 seconds in FIG. 9 .

The process of determining the relationship between the unfreezing component and the component coefficient k will be described in detail below.

In the embodiment of the present invention, 200g and 400g of minced meat were respectively used as thawed food for heating and thawing. After the heating starts, the cooling fan outside the heating chamber is turned on to make the temperature in the heating chamber uniform, so as to reduce the error that occurs when the temperature of the frozen minced meat is detected. For example, within 10 seconds after the heating button is pressed, only the cooling fan and the infrared sensor are operated, and the output voltage of the infrared sensor within the 10 seconds is acquired as the minimum value Vs. If Vs is greater than a certain value, it is determined that the object to be heated is not a frozen product, and the heating is stopped and a prompt message is issued, so as to prevent users from using it incorrectly.

In the embodiment of the present invention, the graph shown in FIG. 6 is obtained by recording the output voltage and time of the infrared sensor when 200g and 400g of minced meat are heated and thawed. Among Fig. 6, 16a is the graph of heating and thawing 400g minced meat, and 16b is the graph of heating and thawing 200g of minced meat. As shown in Figure 6, the output voltage of the infrared sensor when 200g of minced meat is heated and thawed changes faster than the output voltage of the infrared sensor when 400g of minced meat is heated and thawed.

In the embodiment of the present invention, it further includes: a module for obtaining component coefficients of different components. The component coefficient acquisition module of different components is used to separately heat and defrost the known different components of food, and respectively obtain the fourth detection value output by the temperature sensor within the third predetermined time period and the fourth predetermined time period of the food with different components The fourth detection value output by the internal temperature sensor, according to the third detection value, the fourth detection value and the time difference between the third predetermined time period and the fourth predetermined time period, determine the component coefficient corresponding to each known different component, and calculate The relationship between output components and component coefficients.

Fig. 7 is a detailed analysis diagram of the voltage output of the infrared sensor when 200g and 400g of minced meat are heated and defrosted. Usually, when heating and thawing, in order to prevent uneven heating or local overheating, heating units such as magnetrons will be turned on or off in a predetermined cycle, that is, heating for a predetermined time and then stopping for a certain period of time, and then heating for a predetermined time, repeating this process process. In the embodiment shown in FIG. 7 , the magnetron is heated for 9 seconds, then stopped for 20 seconds, then heated for 9 seconds, and then stopped for 20 seconds, and the process is repeated. In order to prevent the noise caused by the heating of the heating unit such as the magnetron to the temperature acquisition, in the embodiment of the present invention, the temperature of the minced meat is collected within 20 seconds after the magnetron stops heating, so as to obtain the unfreezing temperature according to the collected sensor output voltage. Relationship between components and component coefficients. The coefficient determining module 11 obtains the following relational formula M=A×k+B...(Formula 1) after detecting and calculating a large amount of data, M represents a component, A and B represent constant coefficients, and K represents a component coefficient.

In one embodiment of the present invention, choose the 3rd and the 5th cycle that the heating cooker stops working as the time period for detecting the temperature of the thawed food, and take the average value of the collected values in this time period as the time period in this time period. Data collection. The 3rd and 5th cycles are taken as the detection time period because the change trend of the output voltage curve of the temperature sensor is relatively more obvious in this time period. According to the average value obtained by the third and fifth cycle detection, the slope (that is, k) can be obtained according to the following formula:

dv/dt=(V2－V1)×100/(time difference between the 5th cycle and the 3rd cycle)

V1; (the average value of the output voltage during the OFF time of the third cycle)

V2; (the average value of the output voltage during the OFF time of the fifth cycle)

Since the voltage difference is relatively small, for the convenience of calculation and comparison, the slope is multiplied by 100 in the embodiment of the present invention. In the embodiment of the present invention, as an example, as shown in FIG. 7 , the average voltages in the third cycle and the fifth cycle are respectively collected. The average voltage of 200g minced meat in the third cycle is 1.063V, and the average voltage in the fifth cycle is 1.118V. The average voltage of 400g minced meat in the third cycle is 1.025V, and the average voltage in the fifth cycle is 1.062V. Calculation by the above formula 1 can be obtained when 400g minced meat is heated and thawed as: 1.062-1.025)×100/58=0.06. It can also be obtained that k is (1.118-1.063)×100/58=0.09 when 200g of minced meat is heated and thawed. In order to facilitate the operation and the computing power of the processor, k can be multiplied by 100 in the actual operation. At this time, A calculated according to Formula 1 is -66.7, and B is 800. Therefore, Equation 1 can be expressed as M=-66.7*k+800.

In one embodiment of the present invention, on the basis of determining the components by the coefficient determination module 11, by heating and thawing food of different components and recording the heating time and components, the relationship between the thawing components and the heating time can be obtained as follows: T=M×X+Y...(Equation 2), where T represents the heating time for the thawed food, M represents the weight of the food to be thawed, and X and Y are constant coefficients. In the embodiment of the present invention, in order to reduce errors and noises, methods such as removing the average value of the above calculation results may be used.

In one embodiment of the present invention, the time difference between the first predetermined time period and the heating start time matches the time difference between the third predetermined time period and the heating start time, and the second predetermined time period matches the heating start time The time difference between, and the time difference between the fourth predetermined time period and the heating start time match. For example, in the above embodiment, the time periods used to determine the relationship between the components and the component coefficients are the 3rd and 5th cycles, then the time period collected when it is determined that the food to be thawed is heated and thawed is also in the The time period of the 3rd and 5th cycle when the food is heated and thawed. The validity and consistency of the data can be ensured by using a matching time period when determining the relationship between the component and the component coefficient and when heating and thawing the food to be thawed, so that the thawing can be performed accurately.

In one embodiment of the present invention, after the coefficient determination module 11 determines the relationship between different components and the component coefficient k, the defrosting component determination module 13 can obtain the component to be defrosted as long as the component coefficient k is determined during heating and defrosting, thereby The heating time can be determined according to Formula 2, so that the control module 14 can heat and defrost the defrosted food.

In one embodiment of the present invention, when the food to be thawed is heated and thawed, the acquisition module 12 acquires the output voltages of the infrared sensors in multiple intervals of the food to be thawed when the magnetron stops working, and calculates the output voltage of the infrared sensor in each interval. The average voltage, and the time difference of the detection points corresponding to the connected average voltage. In order to reduce the amount of calculation and ensure accuracy, the detection interval is the same as the detection interval when the component coefficient k is determined above. For example, detecting the third cycle, the fifth cycle, etc., may be determined by the acquisition interval when determining the relationship between different components and the component coefficient k. The unfreezing component determination module 13 obtains the variation of the output voltage through the output voltage and time of the infrared sensor, that is, obtains the component coefficient k. For the convenience of calculation, the value of k can be set as k*100 as above, and the unfreezing can be obtained by further formula 1 portion. Then, the heating time is obtained through Formula 2, so that the control module 14 can control the heating and thawing of the defrosted food.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations to the present invention. Variations, modifications, substitutions, and modifications to the above-described embodiments are possible within the scope of the present invention.

Claims (16)

1. the food defrosting method of a heating device, it is characterised in that including:

Obtaining step, treats defrosting food and is heated thawing, and obtains the second detected value of temperature sensor output in the first detected value and the second given time section that temperature sensor exports in the first given time section;

Defrosting component determines step, according to the time difference between described first detected value, the second detected value and described first given time section and described second given time section, the component coefficient of defrosting food is treated described in determining, according to the relation between the component obtained in advance and component coefficient, to treat the component of defrosting food described in determining; And

According to the described component treating defrosting food, rate-determining steps, determines to described, heat time heating time treats that defrosting food is thawed.

2. method according to claim 1, it is characterised in that the component coefficient of described different components is obtained by following steps:

The food of known different components is respectively heated defrosting, and respectively obtain the 4th detected value of temperature sensor output in the 4th detected value of food temperature sensor output in the 3rd given time section of described different component and the 4th given time section, determine the component coefficient corresponding with each known different components described according to described 3rd detected value, time difference between the 4th detected value and described 3rd given time section and described 4th given time section, calculate the relation between component and component coefficient.

3. method according to claim 1, it is characterised in that described first given time section suspends heating work with described heating device in described second given time section.

4. the method according to any one of claim 1-3, it is characterised in that in described rate-determining steps, according to the described component treating defrosting food and utilize equation below to determine described heat time heating time, to treat that defrosting food is heated thawing to described,

T=M �� X+Y,

Wherein, T represents described heat time heating time, M represent described in treat the component of defrosting food, X, Y are constant coefficient.

5. the method according to any one of claim 1-3, it is characterised in that the relation between described component and component coefficient is represented by equation below,

M=A �� k+B,

Wherein, M represents described component, and A, B represent that constant coefficient, K represent described component coefficient.

6. the method according to any one of claim 1-3, it is characterised in that obtain the multiple detected value of temperature sensor in described first given time section, average as described first detected value using the plurality of detected value, and/or

The multiple detected value of temperature sensor, average as described second detected value using the plurality of detected value is obtained in described second given time section.

7. the method according to any one of claim 1-3, it is characterised in that the time difference between described first given time section and heating start-up time, and the time difference between described 3rd given time section and heating start-up time matches, and/or

Time difference between described second given time section and heating start-up time, and the time difference between described 4th given time section and heating start-up time matches.

8. method according to claim 7, it is characterised in that described first��the 4th given time section be arranged at described in treat the defrosting food intensification trend comparatively significantly stage.

9. the food defrosting system of a heating device, it is characterised in that including:

Acquisition module, is used for treating defrosting food and is heated thawing, and obtain the second detected value of temperature sensor output in the first detected value and the second given time section that temperature sensor exports in the first given time section;

Defrosting component determines module, for according to the time difference between described first detected value, the second detected value and described first given time section and described second given time section, the component coefficient of defrosting food is treated described in determining, according to the relation between the component obtained in advance and component coefficient, to treat the component of defrosting food described in determining; And

Control module, described in basis, treat that the component of defrosting food determines to described, heat time heating time treats that defrosting food is thawed.

10. system according to claim 9, it is characterised in that also include:

The component coefficient acquisition module of different components, for the food of known different components is respectively heated defrosting, and respectively obtain the 4th detected value of temperature sensor output in the 4th detected value of food temperature sensor output in the 3rd given time section of described different component and the 4th given time section, determine the component coefficient corresponding with each known different components described according to described 3rd detected value, time difference between the 4th detected value and described 3rd given time section and described 4th given time section, calculate the relation between component and component coefficient.

11. system according to claim 9, it is characterised in that described first given time section suspends heating work with described heating device in described second given time section.

12. the system according to any one of claim 9-11, it is characterised in that described control module according to described in treat the component of defrosting food and utilize equation below to determine described heat time heating time, with to described treat defrosting food be heated thaw,

T=M �� X+Y,

Wherein, T represents described heat time heating time, M represent described in treat the component of defrosting food, X, Y are constant coefficient.

13. the system according to any one of claim 9-11, it is characterised in that the relation between described component and component coefficient is represented by equation below,

M=A �� k+B,

Wherein, M represents described component, and A, B represent that constant coefficient, K represent described component coefficient.

14. the system according to any one of claim 9-11, it is characterised in that described acquisition module performs following steps:

The multiple detected value of temperature sensor is obtained in described first given time section, average as described first detected value using the plurality of detected value, and/or

The multiple detected value of temperature sensor, average as described second detected value using the plurality of detected value is obtained in described second given time section.

15. the system according to any one of claim 9-11, it is characterised in that described acquisition module also executes the following steps:

Time difference between described first given time section and heating start-up time, and the time difference between described 3rd given time section and heating start-up time matches, and/or

Time difference between described second given time section and heating start-up time, and the time difference between described 4th given time section and heating start-up time matches.

16. system according to claim 15, it is characterised in that described first��the 4th given time section be arranged at described in treat the defrosting food intensification trend comparatively significantly stage.