CN113738684A

CN113738684A - Temperature control method and device and cooking appliance

Info

Publication number: CN113738684A
Application number: CN202010478380.5A
Authority: CN
Inventors: 方斌
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-12-03
Anticipated expiration: 2040-05-29
Also published as: CN113738684B

Abstract

The invention discloses a temperature control method and device and a cooking appliance. Wherein, the method comprises the following steps: acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the previous moment of the current moment; obtaining a difference value between the current temperature and the historical temperature to obtain a current temperature variation; determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation; and controlling the fan to operate according to the target rotating speed. The invention solves the technical problem of lower accuracy of the temperature control method of the electronic device in the related technology.

Description

Temperature control method and device and cooking appliance

Technical Field

The invention relates to the field of household appliances, in particular to a temperature control method and device and a cooking appliance.

Background

Cooking appliances using Induction Heating (IH), such as electric pressure cookers and rice cookers, have the advantages of high power and high cooking speed, but the Heating power is high, which may cause the temperature rise of electronic devices to be too high. In order to avoid damage to the electronic device caused by overhigh temperature rise of the electronic device, a high-rotation-speed fan can be arranged inside the cooking appliance, the cooking appliance works at a fixed rotation speed in the heating work process, the adjustment cannot be carried out according to the real-time temperature of the electronic device, the control accuracy is low, and large noise can be generated.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the invention provides a temperature control method and device and a cooking utensil, and aims to at least solve the technical problem that the accuracy of a temperature control method of an electronic device in the related art is low.

According to an aspect of an embodiment of the present invention, there is provided a temperature control method including: acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the previous moment of the current moment; obtaining a difference value between the current temperature and the historical temperature to obtain a current temperature variation; determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation; and controlling the fan to operate according to the target rotating speed.

In the embodiment of the invention, the fan is adopted to radiate the electronic device, the rotating speed of the fan is related to the real-time temperature and the temperature variation of the electronic device, the temperature rise of the electronic device is controlled in a closed-loop manner, the aim of controlling the trend of the temperature rise variation of the electronic device in advance is fulfilled, the technical effects of improving the control accuracy and reducing the noise of the fan are achieved, and the technical problem that the accuracy of the temperature control method of the electronic device in the related art is lower is further solved.

Optionally, determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation includes: determining a current rotating speed corresponding to the current temperature based on the corresponding relation between the temperature and the rotating speed; determining a current rotation speed variation corresponding to the current temperature variation based on the corresponding relation between the temperature variation and the rotation speed variation; and acquiring the sum of the current rotating speed and the current rotating speed variable quantity to obtain the target rotating speed. The temperature rise of the electronic device is controlled in a closed loop mode by combining the trend of temperature rise change on the basis of real-time temperature through the pre-constructed corresponding relationship between the temperature and the rotating speed and the corresponding relationship between the temperature change amount and the rotating speed change amount, and the purpose of controlling the trend of the temperature rise change of the electronic device in advance is achieved.

Optionally, determining a current rotation speed corresponding to the current temperature based on the corresponding relationship between the temperature and the rotation speed includes: acquiring a first proportional value of the temperature and the rotating speed, wherein the first proportional value is the ratio of the rotating speed difference of the fan to the temperature difference of the electronic device, the rotating speed difference is the difference of the maximum rotating speed and the minimum rotating speed of the fan, and the temperature difference is the difference of the highest temperature and the lowest temperature of the electronic device; obtaining the difference between the current temperature and the lowest temperature to obtain a first difference value; obtaining a product of the first difference value and the first proportional value to obtain a first product value; and acquiring the sum of the minimum rotating speed and the first product value to obtain the current rotating speed. Under the condition that the temperature and the rotating speed are in a linear proportional relation, the current rotating speed is determined through the current temperature, the minimum rotating speed of the fan and the minimum temperature of the electronic device, and the purpose of rapidly determining the current rotating speed variation and meeting the use requirements of different types of cooking appliances is achieved.

Optionally, determining a current rotation speed corresponding to the current temperature based on the corresponding relationship between the temperature and the rotation speed includes: acquiring a first proportional value of temperature and rotating speed; obtaining the difference between the highest temperature and the current temperature of the electronic device to obtain a second difference value; obtaining a product of the second difference value and the first proportional value to obtain a second product value; and acquiring the difference between the maximum rotating speed of the fan and the second product value to obtain the current rotating speed. Under the condition that the temperature and the rotating speed are in a linear proportional relation, the current rotating speed is determined through the current temperature, the maximum rotating speed of the fan and the maximum temperature of the electronic device, and the purpose of rapidly determining the current rotating speed variation and meeting the use requirements of different types of cooking appliances is achieved.

Optionally, determining a current rotation speed corresponding to the current temperature based on the corresponding relationship between the temperature and the rotation speed includes: acquiring a plurality of temperature intervals and a preset rotating speed corresponding to each temperature interval; determining a target temperature interval corresponding to the current temperature; and acquiring a preset rotating speed corresponding to the target temperature interval to obtain the current rotating speed. The current rotating speed is determined through the segmented corresponding relation between the temperature and the rotating speed, so that the aim of meeting the use requirements of different types of cooking appliances while the current rotating speed is rapidly determined is fulfilled.

Optionally, determining a current rotation speed variation corresponding to the current temperature variation based on a corresponding relationship between the temperature variation and the rotation speed variation, including: acquiring a second proportional value of the temperature variation and the rotating speed variation, wherein the second proportional value is the ratio of a preset speed value and preset acquisition time of the cooking utensil; obtaining a product of the current temperature variation and the second proportional value to obtain a third product value; and acquiring the sum of the third product and a preset value to obtain the current rotating speed variation. The current rotating speed variation is determined through the linear proportional relation between the temperature variation and the rotating speed variation, so that the purpose of meeting the use requirements of different types of cooking appliances while the current rotating speed variation is rapidly determined is achieved.

Optionally, determining a current rotation speed variation corresponding to the current temperature variation based on a corresponding relationship between the temperature variation and the rotation speed variation, including: acquiring a plurality of temperature variation intervals and a preset rotating speed variation corresponding to each temperature variation interval; determining a target temperature variation interval corresponding to the current temperature variation; and acquiring a preset rotating speed variation corresponding to the target temperature variation interval to obtain the current rotating speed variation. The current rotating speed variation is determined according to the segmented corresponding relation of the temperature variation and the rotating speed variation, so that the purpose of meeting the use requirements of cooking utensils of different types while the current rotating speed variation is rapidly determined is achieved.

Optionally, before controlling the fan to operate at the target rotation speed, the method further comprises: judging whether the target rotating speed is less than the minimum rotating speed of the fan or not or whether the target rotating speed is greater than the maximum rotating speed of the fan or not; controlling the fan to operate according to the minimum rotating speed under the condition that the target rotating speed is less than the minimum rotating speed; controlling the fan to operate according to the maximum rotating speed under the condition that the target rotating speed is greater than the maximum rotating speed; and controlling the fan to operate according to the target rotating speed under the condition that the target rotating speed is greater than the minimum rotating speed and less than the maximum rotating speed. By comparing the target rotating speed with the maximum rotating speed and the minimum rotating speed, the problem that the rotating speed of the fan cannot reach the target rotating speed and the temperature control effect is influenced is avoided.

According to another aspect of the embodiments of the present invention, there is also provided a temperature control apparatus including: the acquisition module is used for acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the moment before the current moment; the processing module is used for acquiring a difference value between the current temperature and the historical temperature to obtain a current temperature variation; the determining module is used for determining the target rotating speed of a fan in the cooking appliance based on the current temperature and the current temperature variation; and the control module is used for controlling the fan to operate according to the target rotating speed.

Optionally, the determining module includes: the first determining unit is used for determining the current rotating speed corresponding to the current temperature based on the corresponding relation between the temperature and the rotating speed; a second determining unit configured to determine a current rotation speed variation corresponding to the current temperature variation based on a correspondence between the temperature variation and the rotation speed variation; and the processing unit is used for acquiring the sum of the current rotating speed and the current rotating speed variable quantity to obtain the target rotating speed.

According to another aspect of the embodiments of the present invention, there is also provided a cooking appliance including: an electronic device; a fan for blowing air to the electronic device; the temperature sensor is used for acquiring the temperature of the electronic device; and the controller is connected with the fan and the temperature sensor and used for determining a target rotating speed of the fan based on the current temperature acquired by the temperature sensor at the current moment and the historical temperature acquired by the temperature sensor at the previous moment of the current moment and controlling the fan to operate at the target rotating speed, wherein the target rotating speed is determined based on the current temperature and the difference value between the current temperature and the historical temperature.

Optionally, the controller is further configured to obtain a current rotation speed corresponding to the current temperature, and a sum of a current rotation speed variation corresponding to a difference between the current temperature and the historical temperature, to obtain the target rotation speed, where the current rotation speed is determined based on a corresponding relationship between the temperature and the rotation speed, and the current rotation speed variation is determined based on a corresponding relationship between the temperature variation and the rotation speed variation.

Optionally, the cooking appliance is an electric pressure cooker.

According to another aspect of the embodiments of the present invention, there is also provided a storage medium including a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the above temperature control method.

According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes the temperature control method described above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a flow chart of a temperature control method according to an embodiment of the invention;

FIG. 2 is a flow chart of an alternative temperature control method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a temperature control device according to an embodiment of the present invention; and

fig. 4 is a schematic view of a cooking appliance according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In order to avoid overhigh temperature rise of an electronic device, the conventional temperature control method can control the rotating speed of a fan by acquiring the current temperature of the electronic device in real time, but the temperature control is delayed and the control accuracy is limited because the control is not performed in advance aiming at the trend of temperature rise change of the electronic device.

In accordance with an embodiment of the present invention, there is provided a temperature control method, it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than that described herein.

Fig. 1 is a flowchart of a temperature control method according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:

step S102, acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the previous moment of the current moment;

the electronic device in the above step may be a power device in a cooking appliance, for example, an Insulated Gate Bipolar Transistor (IGBT) or the like, and the cooking appliance may be an appliance capable of realizing high-power fast cooking, for example, an electric pressure cooker, an induction cooker, an electric rice cooker or the like that heats by IH method, but is not limited thereto, and in the present embodiment, an electric pressure cooker is taken as an example for description.

The temperature of the electronic device can be acquired through the temperature sensor arranged near the electronic device, and the temperature sensor acquires according to a preset acquisition period, so that different temperature values can be acquired at different moments. After receiving the temperature value collected by the temperature sensor, the control chip of the cooking appliance can store the temperature value so as to be convenient for use in the next control process.

In an optional embodiment, the control chip may use a temperature value acquired by the temperature sensor in the current acquisition period as a current temperature, and use a temperature value acquired last time as a historical temperature, so that the temperature rise change of the electronic device in the current sampling period can be determined based on the current temperature and the historical temperature, and the trend of the temperature rise change in the next sampling period can be estimated.

Step S104, acquiring a difference value between the current temperature and the historical temperature to obtain a current temperature variation;

the current temperature variation in the above step may be a variation of temperature rise in the current collection period, that is, in a process from the last collected temperature value to the current collected temperature value, the temperature rise of the electronic device changes, and therefore, the current temperature variation is the current temperature — the historical temperature.

Step S106, determining a target rotating speed of a fan in the cooking appliance based on the current temperature and the current temperature variation;

the target rotating speed in the above step may be the rotating speed of the fan determined according to the real-time temperature of the electronic device and the trend of temperature rise change of the electronic device, so that heat dissipation may be performed by the fan to avoid an excessive temperature rise of the electronic device.

And step S108, controlling the fan to operate according to the target rotating speed.

In an alternative embodiment, in order to avoid the temperature of the electronic device being too high during the heating process of the cooking appliance, a fan may be provided in the cooking appliance, and the electronic device is cooled by the fan. In the heating process of the cooking appliance, the current temperature of the electronic device can be acquired in real time, and the rotating speed of the fan is controlled by combining the trend of temperature rise change, so that the temperature of the electronic device is ensured to be within a normal working range, and overhigh temperature rise is avoided.

Based on the above embodiment of the invention, the fan is adopted to radiate the electronic device, the rotating speed of the fan is associated with the real-time temperature and the temperature variation of the electronic device, the temperature rise of the electronic device is controlled in a closed-loop manner, and the purpose of controlling the trend of the temperature rise variation of the electronic device in advance is achieved, so that the technical effects of improving the control accuracy and reducing the noise of the fan are achieved, and the technical problem of lower accuracy of the temperature control method of the electronic device in the related art is solved.

Optionally, determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation includes: determining a current rotating speed corresponding to the current temperature based on the corresponding relation between the temperature and the rotating speed; determining a current rotation speed variation corresponding to the current temperature variation based on the corresponding relation between the temperature variation and the rotation speed variation; and acquiring the sum of the current rotating speed and the current rotating speed variable quantity to obtain the target rotating speed.

For different types of cooking appliances, the two corresponding relations in the steps can be linear relations or nonlinear relations, the two corresponding relations can be preset for the different types of cooking appliances and stored in the control chip in advance, so that the control chip can conveniently and rapidly determine the rotating speed of the fan, and the use requirements of the different types of cooking appliances are met.

The current rotation speed in the above step may be a theoretical value of the fan rotation speed corresponding to the real-time temperature of the electronic device, and the current rotation speed variation may be a compensation value of the fan rotation speed determined according to a trend of temperature rise variation of the electronic device.

In an optional embodiment, the temperature rise of the electronic device is controlled in a closed-loop manner by combining the trend of temperature rise change on the basis of real-time temperature and combining a corresponding relation between temperature and rotation speed which can be constructed in advance and a corresponding relation between temperature change and rotation speed change, and the purpose of controlling the trend of temperature rise change of the electronic device in advance is achieved.

It should be noted that, the obtaining of the sum of the current rotation speed and the current rotation speed variation means obtaining an algebraic sum of the current rotation speed and the current rotation speed variation, when the historical temperature is greater than the current temperature, the current temperature variation is a negative value, the corresponding current rotation speed variation is a negative value, and the sum of the current rotation speed and the current rotation speed variation is equivalent to a reduction of a positive value on the basis of the current rotation speed, where the positive value is equal to an absolute value of the current rotation speed variation.

Alternatively, in the above-described embodiment of the present invention, in the case where the correspondence relationship between the temperature and the rotation speed is a linear relationship, the first proportional value indicating the temperature and the rotation speed is a fixed value, and therefore, the first proportional value may be determined in advance according to different fans and electronic devices. The normal operating speeds of the fans are different for different fans and can generally run between a minimum speed and a maximum speed. The normal temperature is different for different electronic devices, and is generally allowed to operate in a temperature range between a minimum temperature and a maximum temperature. Thus, the first ratio may be determined based on a ratio of a rotational speed difference of the fan, which is a difference between a maximum rotational speed and a minimum rotational speed of the fan, to a temperature difference of the electronic device, which is a difference between a maximum temperature and a minimum temperature of the electronic device.

It should be noted that, in order to simplify the processing procedure of the control chip, the first proportional value may be stored in the control chip in advance, so that only reading operation is required in the temperature control procedure, and repeated calculation is not required.

After the first proportional value of the temperature and the rotating speed is obtained, the current rotating speed of the fan can be determined in the following modes so as to achieve the purpose of rapidly determining the current rotating speed.

The first mode can determine the current rotating speed through the current temperature, the minimum rotating speed of the fan and the minimum temperature of the electronic device, and the specific implementation steps comprise: obtaining the difference between the current temperature and the lowest temperature to obtain a first difference value; obtaining a product of the first difference value and the first proportional value to obtain a first product value; and acquiring the sum of the minimum rotating speed and the first product value to obtain the current rotating speed.

The second way can determine the current rotation speed through the current temperature, the maximum rotation speed of the fan and the maximum temperature of the electronic device, and the specific implementation steps include: obtaining the difference between the highest temperature and the current temperature to obtain a second difference value; obtaining a product of the second difference value and the first proportional value to obtain a second product value; and acquiring the difference between the maximum rotating speed of the fan and the second product value to obtain the current rotating speed.

It should be noted that, the current rotation speed may be determined not only by the above-mentioned method, but also by the current temperature, the historical temperature, and the historical rotation speed corresponding to the historical temperature, and the specific steps include: obtaining the product of the current temperature variation and the first proportional value; and obtaining the sum of the product and the historical rotating speed to obtain the current rotating speed.

Optionally, in the above embodiment of the present invention, in the case that the corresponding relationship between the temperature and the rotation speed is a non-linear relationship, the determining step of the current rotation speed includes: acquiring a plurality of temperature intervals and a preset rotating speed corresponding to each temperature interval; determining a target temperature interval corresponding to the current temperature; and acquiring a preset rotating speed corresponding to the target temperature interval to obtain the current rotating speed.

The plurality of temperature intervals in the above steps can be obtained by equally dividing the lowest temperature and the highest temperature of the electronic device, and the rotating speed corresponding to each temperature interval is solidified as the preset rotating speed corresponding to each temperature interval.

Alternatively, in the above-described embodiment of the invention, in the case where the correspondence relationship between the temperature change amount and the rotation speed change amount is a linear relationship, the second proportional value indicating the temperature change amount and the rotation speed change amount is a fixed value, and therefore, the second proportional value may be determined in advance according to different fans and electronic devices. For different cooking appliances, the preset speeds of the dynamic adjustment of the fan are different, and the preset acquisition time of the temperature acquisition is also different, so that the second proportional value can be determined based on the ratio of the preset speed value of the cooking appliance to the preset acquisition time.

It should be noted that, in order to simplify the processing procedure of the control chip, the second proportional value may be stored in the control chip in advance, so that only reading operation is required in the temperature control procedure, and repeated calculation is not required.

After the second proportional value of the temperature variation and the rotation speed variation is obtained, the current rotation speed variation of the fan can be determined in the following manner, so that the purpose of rapidly determining the current rotation speed variation is achieved: obtaining a product of the current temperature variation and the second proportional value to obtain a third product value; and acquiring the sum of the third product and a preset value to obtain the current rotating speed variation.

Optionally, in the above embodiment of the present invention, in a case that the corresponding relationship between the temperature variation and the rotation speed variation is a non-linear relationship, the determining of the current rotation speed variation includes: acquiring a plurality of temperature variation intervals and a preset rotating speed variation corresponding to each temperature variation interval; determining a target temperature variation interval corresponding to the current temperature variation; and acquiring a preset rotating speed variation corresponding to the target temperature variation interval to obtain the current rotating speed variation.

The target rotating speed determined based on the above manner may exceed the normal rotating speed of the fan allowed to operate, so that the fan cannot reach the target rotating speed, and the temperature control effect is affected. In order to avoid the above problem, optionally, in the above embodiment of the present invention, before controlling the fan to operate at the target rotation speed, it may be determined whether the target rotation speed is less than the minimum rotation speed of the fan, or whether the target rotation speed is greater than the maximum rotation speed of the fan; controlling the fan to operate according to the minimum rotating speed under the condition that the target rotating speed is less than the minimum rotating speed; controlling the fan to operate according to the maximum rotating speed under the condition that the target rotating speed is greater than the maximum rotating speed; and controlling the fan to operate according to the target rotating speed under the condition that the target rotating speed is greater than the minimum rotating speed and less than the maximum rotating speed.

A preferred embodiment of the present invention is described below with reference to fig. 2, and as shown in fig. 2, the method comprises the steps of:

and step S21, acquiring the temperature t1 of the power device.

And step S22, calculating a temperature change Δ t of the last cycle to be t1-t0, where t0 is the temperature of the power device collected at the last time.

In step S23, the fan Speed is calculated as Fn1(t 1).

Alternatively, Fn1() may be a linear or non-linear relationship as a function of temperature and rotational speed.

For the linear relationship, Speed ═ SpeedMin + (t1-TBas) × (SpeedMax-SpeedMin)/(Tmax-TBas), where SpeedMin is the minimum rotation Speed of the fan, SpeedMax is the maximum rotation Speed of the fan, TBas is the basic temperature value of the power device (i.e., the minimum temperature mentioned above), and Tmax is the maximum temperature of the power device, i.e., the IGBT temperature protection point.

For non-linear relationships, Tmax is segmented with TBas average, the Speed within each segment is cured, e.g., t1< TBas, Speed ═ S1; (TBas, TBas + T (segmentation)), Speed ═ S2; … …, respectively; t1> Tmax, Speed ═ Sn, where S1, S2, … …, Sn are constants.

In step S24, Δ S is Fn2(Δ t).

Alternatively, Fn1() may be a linear relationship or a nonlinear relationship as a functional relationship between Δ t and Δ S.

For the linear relationship, Δ S ═ S × Δ t/Time + b, where S is the preset rotation speed, Time is the preset acquisition Time, and b is a constant.

For non-linear relationships, Δ t < Δtmin (setting a minimum), Δ S ═ Δ S1; (Δtmin, Δ tmin + t), Δ S ═ Δ S2; … …, respectively; Δ t >. DELTA.tmax (set to a maximum value), Δ S ═ Δ Sn, where Δ S1, Δ S2, … …, Δ Sn are constants.

In step S25, the actual fan Speed +. DELTA.S.

In step S26, it is determined whether the actual rotational speed is greater than the maximum rotational speed of the fan or less than the minimum rotational speed of the fan.

Alternatively, if yes, i.e. greater than the maximum rotational speed of the fan, or less than the minimum rotational speed of the fan, the process goes to step S27; if not, i.e., less than the maximum rotational speed of the fan and greater than the minimum rotational speed of the fan, the process proceeds to step S28.

In step S27, the rotation speed of the fan is limited to the maximum rotation speed or the minimum rotation speed.

Optionally, in the case of being greater than the maximum rotation speed of the fan, limiting the rotation speed of the fan to the maximum rotation speed; and limiting the rotation speed of the fan to be the minimum rotation speed under the condition of being less than the minimum rotation speed of the fan.

In step S28, the fan is controlled.

Alternatively, in the case that the calculated rotation speed of the fan is less than the maximum rotation speed and greater than the minimum rotation speed, the calculated rotation speed may be output, and the fan is controlled to operate to dissipate heat of the power device, and then the step S21 is executed again until the cooking appliance stops heating.

Through the steps, the rotating speed of the fan, the temperature point and the temperature variation can be correlated, and the effects of temperature rise and advanced control of the closed-loop control power device are achieved; the low-temperature low-speed low-noise power device has the advantages of low rotating speed and low noise, and can be controlled in advance when the temperature changes rapidly, so that the trend of temperature rise change of the power device is effectively suppressed, and high noise is avoided or reduced.

According to an embodiment of the present invention, a temperature control apparatus is further provided, which can perform the method provided in the foregoing embodiment, and the detailed description of the preferred embodiment is omitted here.

Fig. 3 is a schematic view of a temperature control apparatus according to an embodiment of the present invention, as shown in fig. 3, the apparatus including:

an obtaining module 32, configured to obtain a current temperature of the electronic device collected at a current time and a historical temperature of the electronic device collected at a previous time of the current time;

the processing module 34 is configured to obtain a difference between the current temperature and the historical temperature to obtain a current temperature variation;

a determination module 36 for determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation;

and a control module 38 for controlling the fan to operate at the target speed.

Optionally, in the above embodiment of the present invention, the first determining unit is further configured to perform the following steps: acquiring a first proportional value of the temperature and the rotating speed, wherein the first proportional value is the ratio of the rotating speed difference of the fan to the temperature difference of the electronic device, the rotating speed difference is the difference of the maximum rotating speed and the minimum rotating speed of the fan, and the temperature difference is the difference of the highest temperature and the lowest temperature of the electronic device; obtaining the difference between the current temperature and the lowest temperature to obtain a first difference value; obtaining a product of the first difference value and the first proportional value to obtain a first product value; and acquiring the sum of the minimum rotating speed and the first product value to obtain the current rotating speed.

Optionally, in the above embodiment of the present invention, the first determining unit is further configured to perform the following steps: acquiring a first proportional value of temperature and rotating speed; obtaining the difference between the highest temperature and the current temperature of the electronic device to obtain a second difference value; obtaining a product of the second difference value and the first proportional value to obtain a second product value; and acquiring the difference between the maximum rotating speed of the fan and the second product value to obtain the current rotating speed.

Optionally, in the above embodiment of the present invention, the first determining unit is further configured to perform the following steps: acquiring a plurality of temperature intervals and a preset rotating speed corresponding to each temperature interval; determining a target temperature interval corresponding to the current temperature; and acquiring a preset rotating speed corresponding to the target temperature interval to obtain the current rotating speed.

Optionally, in the foregoing embodiment of the present invention, the second determining unit is further configured to perform the following steps: acquiring a second proportional value of the temperature variation and the rotating speed variation, wherein the second proportional value is the ratio of a preset speed value and preset acquisition time of the cooking utensil; obtaining a product of the current temperature variation and the second proportional value to obtain a third product value; and acquiring the sum of the third product and a preset value to obtain the current rotating speed variation.

Optionally, in the foregoing embodiment of the present invention, the second determining unit is further configured to perform the following steps: acquiring a plurality of temperature variation intervals and a preset rotating speed variation corresponding to each temperature variation interval; determining a target temperature variation interval corresponding to the current temperature variation; and acquiring a preset rotating speed variation corresponding to the target temperature variation interval to obtain the current rotating speed variation.

Optionally, in the above embodiment of the present invention, the apparatus further includes: the judging module is used for judging whether the target rotating speed is less than the minimum rotating speed of the fan or not or whether the target rotating speed is greater than the maximum rotating speed of the fan or not; the control module is also used for controlling the fan to operate according to the minimum rotating speed under the condition that the target rotating speed is less than the minimum rotating speed; controlling the fan to operate according to the maximum rotating speed under the condition that the target rotating speed is greater than the maximum rotating speed; and controlling the fan to operate according to the target rotating speed under the condition that the target rotating speed is greater than the minimum rotating speed and less than the maximum rotating speed.

According to an embodiment of the present invention, a cooking appliance is further provided, where the cooking appliance may perform the method provided in the foregoing embodiment, and the description of the preferred embodiment is omitted here.

Fig. 4 is a schematic view of a cooking appliance according to an embodiment of the present invention, as shown in fig. 4, the cooking appliance including: electronics 10, fan 20, temperature sensor 30, and controller 40, controller 40 is connected with fan 20 and temperature sensor 30.

Wherein the fan 20 is used for blowing air to the electronic device 10; the temperature sensor 30 is used for acquiring the temperature of the electronic device 10; the controller 40 is configured to determine a target rotation speed of the fan 20 based on a current temperature collected by the temperature sensor 30 at a current time and a historical temperature collected by the temperature sensor 30 at a previous time before the current time, and control the fan 20 to operate at the target rotation speed, wherein the target rotation speed is determined based on the current temperature and a difference between the current temperature and the historical temperature.

Optionally, in the foregoing embodiment of the present invention, the controller is further configured to obtain a first proportional value of the temperature and the rotation speed, obtain a difference between the current temperature and the lowest temperature, obtain a first difference value, obtain a product of the first difference value and the first proportional value, obtain a first product, obtain a sum of the minimum rotation speed and the first product, and obtain the current rotation speed, where the first proportional value is a ratio of a rotation speed difference value of the fan to a temperature difference value of the electronic device, the rotation speed difference value is a difference value of the maximum rotation speed and the minimum rotation speed of the fan, and the temperature difference value is a difference value of the highest temperature and the lowest temperature of the electronic device.

Optionally, in the foregoing embodiment of the present invention, the controller is further configured to obtain a first proportional value of the temperature and the rotation speed, obtain a difference between a highest temperature of the electronic device and a current temperature, obtain a second difference value, obtain a product of the second difference value and the first proportional value, obtain a second product value, and obtain a difference between a maximum rotation speed of the fan and the second product value, so as to obtain the current rotation speed.

Optionally, in the above embodiment of the present invention, the controller is further configured to obtain a plurality of temperature intervals, and a preset rotation speed corresponding to each temperature interval, and obtain a preset rotation speed corresponding to a target temperature interval to which the current temperature belongs, so as to obtain the current rotation speed.

Optionally, in the foregoing embodiment of the present invention, the controller is further configured to obtain a second proportional value of the temperature variation and the rotation speed variation, obtain a product of the current temperature variation and the second proportional value, obtain a third product, and obtain a sum of the third product and a preset value, so as to obtain the current rotation speed variation, where the second proportional value is a ratio of a preset speed value of the cooking appliance to a preset collection time.

Optionally, in the above embodiment of the present invention, the controller is further configured to obtain a plurality of temperature variation intervals, and preset rotation speed variation corresponding to each temperature variation interval, and obtain a preset rotation speed variation corresponding to a target temperature variation interval to which a current temperature variation belongs, so as to obtain the current rotation speed variation.

Optionally, in the foregoing embodiment of the present invention, the controller is further configured to determine whether the target rotation speed is less than a minimum rotation speed of the fan, or is greater than a maximum rotation speed of the fan, where in a case that the target rotation speed is less than the minimum rotation speed, the fan is controlled to operate at the minimum rotation speed; controlling the fan to operate according to the maximum rotating speed under the condition that the target rotating speed is greater than the maximum rotating speed; and controlling the fan to operate according to the target rotating speed under the condition that the target rotating speed is greater than the minimum rotating speed and less than the maximum rotating speed.

According to an embodiment of the present invention, there is also provided a storage medium including a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the temperature control method in the above-described embodiment.

According to an embodiment of the present invention, there is also provided a processor, where the processor is configured to execute a program, where the program executes the temperature control method in the foregoing embodiment.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A method of temperature control, comprising:

acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the moment before the current moment;

obtaining a difference value between the current temperature and the historical temperature to obtain a current temperature variation;

determining a target rotation speed of a fan in the cooking appliance based on the current temperature and the current temperature variation;

and controlling the fan to operate according to the target rotating speed.

2. The method of claim 1, wherein determining a target speed of a fan in a cooking appliance based on the current temperature and the current temperature delta comprises:

determining a current rotating speed corresponding to the current temperature based on the corresponding relation between the temperature and the rotating speed;

determining a current rotation speed variation corresponding to the current temperature variation based on a corresponding relation between the temperature variation and the rotation speed variation;

and acquiring the sum of the current rotating speed and the current rotating speed variable quantity to obtain the target rotating speed.

3. The method of claim 2, wherein determining a current rotational speed corresponding to the current temperature based on a correspondence of temperature and rotational speed comprises:

acquiring a first proportional value of temperature and rotation speed, wherein the first proportional value is a ratio of a rotation speed difference value of the fan to a temperature difference value of the electronic device, the rotation speed difference value is a difference value of a maximum rotation speed and a minimum rotation speed of the fan, and the temperature difference value is a difference value of a maximum temperature and a minimum temperature of the electronic device;

obtaining the difference between the current temperature and the lowest temperature to obtain a first difference value;

obtaining a product of the first difference value and the first proportional value to obtain a first product value;

and acquiring the sum of the minimum rotating speed and the first product value to obtain the current rotating speed.

4. The method of claim 2, wherein determining a current rotational speed corresponding to the current temperature based on a correspondence of temperature and rotational speed comprises:

acquiring a first proportional value of temperature and rotating speed;

obtaining the difference between the highest temperature of the electronic device and the current temperature to obtain a second difference value;

obtaining a product of the second difference value and the first proportional value to obtain a second product value;

and acquiring the difference between the maximum rotating speed of the fan and the second product value to obtain the current rotating speed.

5. The method of claim 2, wherein determining a current rotational speed corresponding to the current temperature based on a correspondence of temperature and rotational speed comprises:

acquiring a plurality of temperature intervals and a preset rotating speed corresponding to each temperature interval;

determining a target temperature interval corresponding to the current temperature;

and acquiring a preset rotating speed corresponding to the target temperature interval to obtain the current rotating speed.

6. The method of claim 2, wherein determining a current amount of change in the rotational speed corresponding to the current amount of change in the temperature based on a correspondence between the amount of change in the temperature and the amount of change in the rotational speed comprises:

acquiring a second proportional value of the temperature variation and the rotating speed variation, wherein the second proportional value is the ratio of a preset speed value and a preset acquisition time of the cooking appliance;

obtaining a product of the current temperature variation and the second proportional value to obtain a third product value;

and acquiring the sum of the third product and a preset value to obtain the current rotating speed variation.

7. The method of claim 2, wherein determining a current amount of change in the rotational speed corresponding to the current amount of change in the temperature based on a correspondence between the amount of change in the temperature and the amount of change in the rotational speed comprises:

acquiring a plurality of temperature variation intervals and a preset rotating speed variation corresponding to each temperature variation interval;

determining a target temperature variation interval corresponding to the current temperature variation;

and acquiring a preset rotating speed variation corresponding to the target temperature variation interval to obtain the current rotating speed variation.

8. The method of claim 1, wherein prior to controlling the fan to operate at the target speed, the method further comprises:

judging whether the target rotating speed is less than the minimum rotating speed of the fan or not or whether the target rotating speed is greater than the maximum rotating speed of the fan or not;

controlling the fan to operate at the minimum rotating speed under the condition that the target rotating speed is less than the minimum rotating speed;

controlling the fan to operate according to the maximum rotating speed under the condition that the target rotating speed is greater than the maximum rotating speed;

and controlling the fan to operate according to the target rotating speed under the condition that the target rotating speed is greater than the minimum rotating speed and less than the maximum rotating speed.

9. A temperature control apparatus, comprising:

the acquisition module is used for acquiring the current temperature of the electronic device acquired at the current moment and the historical temperature of the electronic device acquired at the moment before the current moment;

the processing module is used for acquiring a difference value between the current temperature and the historical temperature to obtain a current temperature variation;

a determination module, configured to determine a target rotation speed of a fan in a cooking appliance based on the current temperature and the current temperature variation;

and the control module is used for controlling the fan to operate according to the target rotating speed.

10. The apparatus of claim 9, wherein the determining module comprises:

the first determining unit is used for determining the current rotating speed corresponding to the current temperature based on the corresponding relation between the temperature and the rotating speed;

a second determining unit configured to determine a current rotation speed variation corresponding to the current temperature variation based on a correspondence between the temperature variation and the rotation speed variation;

and the processing unit is used for acquiring the sum of the current rotating speed and the current rotating speed variable quantity to obtain the target rotating speed.

11. A cooking appliance, comprising:

an electronic device;

a fan for blowing air to the electronic device;

the temperature sensor is used for acquiring the temperature of the electronic device;

and the controller is connected with the fan and the temperature sensor and used for determining a target rotating speed of the fan based on the current temperature acquired by the temperature sensor at the current moment and the historical temperature acquired by the temperature sensor at the previous moment of the current moment and controlling the fan to operate according to the target rotating speed, wherein the target rotating speed is determined based on the current temperature and the difference value between the current temperature and the historical temperature.

12. The cooking appliance according to claim 11, wherein the controller is further configured to obtain a current rotation speed corresponding to the current temperature, and a sum of a current rotation speed variation corresponding to a difference between the current temperature and the historical temperature, to obtain the target rotation speed, wherein the current rotation speed is determined based on a corresponding relationship between the temperature and the rotation speed, and the current rotation speed variation is determined based on a corresponding relationship between the temperature variation and the rotation speed variation.

13. The cooking appliance of claim 11, wherein the cooking appliance is an electric pressure cooker.

14. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program is run, a device in which the storage medium is located is controlled to execute the temperature control method according to any one of claims 1 to 8.

15. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the temperature control method according to any one of claims 1 to 8 when running.