CN114052472A

CN114052472A - Cooking appliance, heat preservation and fresh keeping control method thereof and computer readable storage medium

Info

Publication number: CN114052472A
Application number: CN202010768079.8A
Authority: CN
Inventors: 王丽英; 李晶
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2022-02-18

Abstract

The invention discloses a cooking appliance, a heat preservation and fresh keeping control method thereof and a computer readable storage medium, wherein the cooking appliance comprises an appliance body and an air extraction device, the appliance body defines a cavity, the air extraction device is used for extracting air in the cavity to enable the cavity to be in a negative pressure state, and the heat preservation and fresh keeping control method comprises the following steps: when the cooking appliance performs heat preservation operation, controlling the cooking appliance to heat and detecting the temperature in the cavity; if the temperature in the cavity reaches the first preset temperature, controlling the cooking appliance to stop heating, and controlling the air exhaust device to work; the cooking appliance is controlled to be heated periodically according to the time when the cooking appliance stops heating and the temperature in the cavity, and the air exhaust device is controlled to work periodically according to the time when the air exhaust device works and the time when the air exhaust device stops working. According to the heat preservation and fresh keeping control method provided by the embodiment of the invention, the growth and the propagation of microorganisms are effectively inhibited, and the severe browning and the deterioration of the taste of food are prevented.

Description

Cooking appliance, heat preservation and fresh keeping control method thereof and computer readable storage medium

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a cooking appliance, a heat preservation and fresh keeping control method thereof and a computer readable storage medium.

Background

In the related art, in order to prevent the spoilage of foods such as rice and broth due to the growth and propagation of microorganisms, the problem is often solved by constantly maintaining a high keeping temperature during the keeping process. However, the method easily causes the problems of yellowing and drying of the surface of the rice, serious browning of meat and the like, and particularly, the taste of the rice and the meat is poor after long-time heat preservation, so that the user experience is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling heat preservation and freshness preservation of a cooking utensil, which can effectively inhibit the growth and propagation of microorganisms, prevent food from being seriously browned and taste from being deteriorated, and fully meet the needs of users.

A second object of the invention is to propose a computer-readable storage medium.

The third purpose of the invention is to provide a cooking appliance capable of realizing the heat preservation and fresh keeping control method.

A fourth object of the present invention is to provide a cooking appliance.

In order to achieve the above purpose, a first aspect of the present invention provides a heat preservation and fresh keeping control method for a cooking appliance, where the cooking appliance includes an appliance body defining a cavity to be suitable for containing food, and an air extractor for extracting air in the cavity to make the cavity in a negative pressure state, the heat preservation and fresh keeping control method includes the following steps: when the cooking appliance performs heat preservation operation, controlling the cooking appliance to heat and detecting the temperature in the cavity; judging whether the temperature in the cavity reaches a first preset temperature or not; if the temperature in the cavity reaches a first preset temperature, controlling the cooking appliance to stop heating, and controlling the air exhaust device to work; and controlling the cooking appliance to heat periodically according to the time for stopping heating of the cooking appliance and the temperature in the cavity, and controlling the air exhaust device to work periodically according to the time for working and the time for stopping working of the air exhaust device.

According to the heat preservation and fresh keeping control method of the cooking appliance, when the cooking appliance performs heat preservation operation, the cooking appliance is controlled to periodically heat and the air exhaust device is controlled to periodically work, so that the environment in the cavity is in an interval changing state through the cooperation of periodic heating and periodic vacuumizing, the microorganism is not favorably adaptive to the environment, the growth and the propagation of the microorganism are effectively inhibited, the heat preservation time is prolonged, the damage to food can be reduced as much as possible while the growth and the propagation of the microorganism are inhibited through periodic interval heating, the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation, the taste of the food is favorably improved, in addition, the air exhaust device periodically works, is not required to be in a working state all the time, and the service life can be prolonged.

In addition, the heat preservation and freshness preservation control method of the cooking appliance according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the invention, controlling the cooking appliance to heat periodically according to the time when the cooking appliance stops heating and the temperature in the cavity comprises: when the time that the cooking utensil stops heating reaches first preset time, control the cooking utensil heats to when the temperature in the cavity reaches first preset temperature control the cooking utensil stops heating, so go on repeatedly.

According to some embodiments of the invention, controlling the gas evacuation device to operate periodically in response to when the gas evacuation device is on and when the gas evacuation device is off comprises: and when the time for the air extracting device to work reaches second preset time, controlling the air extracting device to stop working, and when the time for the air extracting device to stop working reaches third preset time, controlling the air extracting device to work, and repeating the steps.

According to some embodiments of the invention, when the air exhaust device needs to be controlled to work while the cooking appliance is controlled to heat, and the air exhaust device is controlled to work after the cooking appliance is heated.

In order to achieve the above object, a computer-readable storage medium according to a second aspect of the present invention is provided, on which a heat preservation and fresh keeping control program of a cooking appliance is stored, and the heat preservation and fresh keeping control program, when executed by a processor, implements a heat preservation and fresh keeping control method of the cooking appliance according to the first aspect of the present invention.

In order to achieve the above object, a cooking appliance according to an embodiment of a third aspect of the present invention includes an appliance body defining a cavity adapted to contain food, and an air extractor for extracting air from the cavity to make the cavity in a negative pressure state, where the cooking appliance further includes a memory, a processor, and a heat and freshness preservation control program stored in the memory and executable on the processor, where the processor implements the heat and freshness preservation control method of the cooking appliance according to the embodiment of the first aspect of the present invention when executing the heat and freshness preservation control program.

In order to achieve the above object, a cooking appliance according to a fourth aspect of the present invention includes: an appliance body defining a cavity adapted to hold food; the air extracting device is used for extracting air in the cavity so as to enable the cavity to be in a negative pressure state; the temperature detection device is used for detecting the temperature in the cavity; control device, control device is used for when cooking utensil carries out the heat preservation operation cooking utensil heats, and judges whether the temperature in the cavity reaches first predetermined temperature, and is in control when the temperature in the cavity reaches first predetermined temperature cooking utensil stop heating, and control air exhaust device carries out work, wherein, control device still is used for the basis cooking utensil stop heating time with temperature control in the cavity cooking utensil heats periodically, and the basis air exhaust device carries out the time of work and the time control of stop work air exhaust device works periodically.

According to the cooking appliance provided by the embodiment of the invention, when the heat preservation operation is carried out, the control device controls the cooking appliance to periodically heat and controls the air exhaust device to periodically work, so that the environment in the cavity is in the state of interval change through the cooperation of periodic heating and periodic vacuumizing, the microorganism is not favorably adaptive to the environment, the growth and the propagation of the microorganism are effectively inhibited, the heat preservation time is prolonged, the damage to food can be reduced as much as possible while the growth and the propagation of the microorganism are inhibited through periodic interval heating, the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation, the taste of the food is favorably improved, in addition, the air exhaust device periodically works, the air exhaust device does not need to be in the working state all the time, and the service life can be prolonged.

According to some embodiments of the present invention, when the control device controls the cooking appliance to periodically perform heating according to the time when the cooking appliance stops heating and the temperature in the cavity, the control device controls the cooking appliance to perform heating when the time when the cooking appliance stops heating reaches a first preset time, and controls the cooking appliance to stop heating when the temperature in the cavity reaches the first preset temperature, and so on.

According to some embodiments of the present invention, when the control device controls the air exhaust device to periodically operate according to the time when the air exhaust device operates and the time when the air exhaust device stops operating, the control device controls the air exhaust device to stop operating when the time when the air exhaust device operates reaches a second preset time, and controls the air exhaust device to operate when the time when the air exhaust device stops operating reaches a third preset time, and so on.

According to some embodiments of the invention, the control device is further configured to, when the air exhaust device needs to be controlled to operate while the cooking appliance is controlled to heat, control the cooking appliance to heat first, and control the air exhaust device to operate after the cooking appliance finishes heating.

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.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of a heat preservation and fresh keeping control method according to an embodiment of the invention;

Fig. 2 is a schematic flow diagram of periodic heating of a cooking appliance according to an embodiment of the invention;

FIG. 3 is a schematic flow diagram of the periodic operation of a gas evacuation device according to an embodiment of the invention;

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

Description of the drawings:

a cooking appliance 100;

an appliance body 10; an air extraction device 20; a temperature detection device 30; and a control device 40.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following describes a heat preservation and freshness preservation control method for a cooking appliance, a computer readable storage medium, and a cooking appliance according to an embodiment of the present invention with reference to the accompanying drawings.

A method for controlling keeping warm and fresh of a cooking appliance according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 3. The cooking utensil can be an electric cooker, an electric pressure cooker, an electric stewpan and the like.

Specifically, the cooking appliance may include an appliance body and an air extraction device. Wherein the appliance body defines a cavity capable of holding food, including but not limited to rice, broth, dish, and the like. The air extractor is used for extracting air in the cavity so as to enable the cavity to be in a negative pressure state. In some embodiments, the air evacuation device may be an air pump.

As shown in fig. 1, the method for controlling the heat preservation and freshness keeping of the cooking appliance comprises the following steps:

s1: when the cooking appliance performs heat preservation operation, controlling the cooking appliance to heat and detecting the temperature in the cavity;

s2: judging whether the temperature in the cavity reaches a first preset temperature or not;

s3: if the temperature in the cavity reaches a first preset temperature, controlling the cooking appliance to stop heating, and controlling the air exhaust device to work;

s4: the cooking appliance is controlled to be heated periodically according to the time when the cooking appliance stops heating and the temperature in the cavity, and the air exhaust device is controlled to work periodically according to the time when the air exhaust device works and the time when the air exhaust device stops working.

Wherein, when cooking utensil carried out the heat preservation operation (for example the heat preservation button on the cooking utensil was triggered carries out the heat preservation operation), if start air exhaust device and bleed in the heating, the steam is continuously produced to the heating in-process, and the atmospheric pressure lasts the increase in the cavity, is unfavorable for the formation of the interior negative pressure of cavity, leads to the negative pressure value in the final cavity to be littleer easily. Therefore, in the heat preservation and fresh keeping control method, the temperature in the cavity is heated to the first preset temperature, and the air exhaust device is controlled to exhaust air after the heating is stopped, so that the negative pressure in the cavity is maintained more favorably.

In some embodiments, the first predetermined temperature T is T, and 50 ℃ ≦ T ≦ 80 ℃, e.g., in some embodiments, the first predetermined temperature T may be 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃, and so forth. In the temperature range, the effect of inhibiting the growth and the propagation of microorganisms is good, the taste of food is moderate, the food cannot be too soft or hard, the damage to the food can be reduced, the food is prevented from being seriously browned, and the temperature range also more meets the temperature requirement of direct eating of most users.

In addition, the cooking appliance is controlled to be periodically heated according to the heating stopping time of the cooking appliance and the temperature in the cavity, namely, interval heating is realized, so that the damage to food is reduced as much as possible while the growth and propagation of organisms are effectively inhibited, and the serious browning and the mouth feel deterioration of the food caused by long-time heat preservation are prevented.

The air extractor is controlled to periodically work according to the working time and the stopping time of the air extractor, namely, the air extraction at intervals is realized, on one hand, a certain negative pressure environment is continuously maintained in the cavity, the oxygen content is reduced, the osmotic pressure is increased, and therefore the effect of inhibiting the growth of microorganisms is achieved; on the other hand, the interval air exhaust is favorable for continuously increasing the negative pressure value in the cavity and the osmotic pressure, and the environment in the cavity is in the environment with interval change, which is more unfavorable for the microorganism to adapt to the environment, thereby inhibiting the growth and the reproduction of the microorganism and prolonging the heat preservation time. In addition, in the working process, the air exhaust device does not need to be in a working state all the time, and the service life of the air exhaust device is prolonged.

In addition, in the heat preservation and fresh keeping control method provided by the embodiment of the invention, as the air exhaust device exhausts air to form a negative pressure state in the cavity, the heating temperature can be lower, and the heat preservation time is longer, so that the heating stopping time can be longer, and the browning of food or the deterioration of taste can be prevented more favorably. And the air extractor is controlled to work according to the working time and the stopping time of the air extractor, so that the heat preservation and fresh-keeping control method is simpler. Therefore, better heat preservation and fresh-keeping effects are realized through a simpler control method.

According to the heat preservation and fresh keeping control method of the cooking appliance in the embodiment of the first aspect of the invention, when the cooking appliance performs heat preservation operation, the cooking appliance is controlled to periodically heat and control the air exhaust device to periodically work, so that the environment in the cavity is in an interval changing state through the cooperation of periodic heating and periodic vacuumizing, the microorganism is not favorably adaptive to the environment, the growth and propagation of the microorganism are effectively inhibited, the heat preservation time is prolonged, the damage to food can be reduced as much as possible while the growth and propagation of the microorganism is inhibited through the periodic interval heating, the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation, the taste of the food is favorably improved, in addition, the air exhaust device periodically works, the air exhaust device does not need to be in a working state all the time, and the service life can be prolonged.

According to some embodiments of the present invention, as shown in fig. 2, controlling the cooking appliance to heat periodically according to a time when the cooking appliance stops heating and a temperature inside the cavity includes:

when the time for stopping heating of the cooking utensil reaches the first preset time, the cooking utensil is controlled to heat, and when the temperature in the cavity reaches the first preset temperature, the cooking utensil is controlled to stop heating, and the operation is repeated.

For example, when the cooking appliance performs the heat preservation operation, after the temperature in the cavity reaches a first preset temperature T, the cooking appliance is controlled to stop heating, and the temperature in the cavity is controlled to be reduced in the heating process; when the time for stopping heating of the cooking appliance for the first time reaches a first preset time T1, controlling the cooking appliance to heat, and controlling the cooking appliance to stop heating after the temperature in the cavity rises to the first preset temperature T again; and when the time for stopping heating for the second time of the cooking appliance reaches the first preset time t1, controlling the cooking appliance to perform heating … …, and repeating the cycle until the heat preservation operation process is finished. The time for stopping heating of the cooking utensil is determined by the preset first preset time, so that the control method is simpler.

In some embodiments, the first preset time t1 may satisfy: t1 is more than 0h and less than or equal to 4 h. For example, in some embodiments, the first preset time t1 may be 0.5h, 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, and the like. Within the time range, the heat preservation effect is effectively ensured, and the food is prevented from seriously browning and the taste of the food is prevented from deteriorating.

According to some embodiments of the present invention, as shown in FIG. 3, controlling the gas evacuation device to operate periodically based on when the gas evacuation device is on and when it is off comprises:

and when the time for the air extracting device to work reaches the second preset time, controlling the air extracting device to stop working, and when the time for the air extracting device to stop working reaches the third preset time, controlling the air extracting device to work, and repeating the steps.

For example, when the cooking appliance performs a heat preservation operation, after the temperature in the cavity reaches a first preset temperature T, the cooking appliance is controlled to stop heating, and the air extraction device is started for the first time to extract air in the cavity, so that the air in the cavity is gradually reduced, and a negative pressure environment is formed; when the first working time of the air extracting device reaches a second preset time t2, controlling the air extracting device to stop working, and maintaining a certain negative pressure environment in the cavity; when the first stop time of the air extracting device reaches a third preset time t3, starting the air extracting device for the second time; when the time of the second work of the air extraction device reaches a second preset time t2, controlling the air extraction device to stop working; and when the time for stopping the air extracting device for the second time reaches the third preset time t3, starting the air extracting device for the third time to work … …, and repeating the cycle until the heat preservation operation process is finished. The heating time and the heating stopping time of the air extracting device are both determined by the preset second preset time and the preset third preset time, so that the control method is simpler.

In some embodiments, the second preset time t2 may satisfy: t2 is more than 0min and less than or equal to 10 min. For example, in some embodiments, the second preset time t2 may be 1min, 2min, 3min, 4min, 5min, 6min, 7min, 8min, 9min, and the like. In the time range, a negative pressure value which is high enough can be generated in the cavity to ensure the heat preservation and fresh-keeping effect, and the working time of the air extracting device is short, which is beneficial to prolonging the service life of the air extracting device.

According to some embodiments of the invention, when the cooking appliance is controlled to heat and the air exhaust device is controlled to work if necessary, the cooking appliance is controlled to heat, and the air exhaust device is controlled to work after the cooking appliance is heated. Because the steam is continuously generated in the heating process, the air pressure in the cavity is continuously increased, the negative pressure in the cavity is not favorably formed, the air exhaust device is controlled to exhaust air after the heating, the air exhaust process is not influenced by the steam generated in the heating process, the negative pressure is more favorably formed, and the formed negative pressure value is more accordant with the heat preservation and freshness preservation requirements.

The advantageous effects of the present invention are described below by way of examples of the present invention and comparison with comparative examples.

Comparative example 1: keeping the temperature at 73 ℃ without air exhaust;

Comparative example 2: the first preset temperature T is 50 ℃, heating is carried out every 4 hours, and air extraction is not carried out;

example 1: the first preset temperature T is 50 ℃, heating is carried out once every 2 hours, and air extraction is carried out once every 1 hour;

example 2: the first preset temperature T is 55 ℃, heating is carried out every 4 hours, and air extraction is carried out every 2 hours;

example 3: the first preset temperature T is 60 ℃, heating is carried out every 4 hours, and air extraction is carried out every 4 hours.

The total heat preservation time is 24 hours, the heat preservation and fresh keeping effects of the examples and the comparative examples are analyzed according to the meat hardness and sensory evaluation, and the detection results are shown in the following table 1.

TABLE 1

As can be seen from table 1, according to the heat preservation and fresh-keeping control method provided by the embodiment of the invention, the required heat preservation temperature can be obviously reduced, the time interval between two times of heating is increased, the heat preservation and fresh-keeping time is prolonged, the effect of preventing food from being seriously browned is better, and the taste of the food is better by controlling the air exhaust device to work periodically.

According to the computer readable storage medium of the embodiment of the second aspect of the present invention, the keep-warm and keep-fresh control program of the cooking appliance is stored on the computer readable storage medium, and when being executed by the processor, the keep-warm and keep-fresh control program realizes the keep-warm and keep-fresh control method of the cooking appliance according to the embodiment of the first aspect of the present invention. Since the heat preservation and fresh-keeping control method of the cooking appliance according to the first aspect of the present invention has the above-mentioned beneficial technical effects, the computer-readable storage medium according to the second aspect of the present invention, which stores the heat preservation and fresh-keeping control program to be executed by the processor, implements the heat preservation and fresh-keeping control method described in the above-mentioned embodiments, by matching the periodic heating and the periodic vacuuming, the environment in the cavity is in an alternate state, so as to be unfavorable for the adaptation of the microorganisms to the environment, effectively inhibit the growth and reproduction of the microorganisms, prolong the heat preservation time, and the periodic alternate heating can inhibit the growth and reproduction of the microorganisms, simultaneously reduce the damage to the food as much as possible, prevent the food from being seriously browned and the taste from being deteriorated due to the long-time heat preservation, be beneficial to the improvement of the taste of the food, and in addition, the air pumping device works periodically, the working state is not required to be kept all the time, and the service life can be prolonged.

The cooking appliance according to the third aspect of the present invention includes an appliance body defining a cavity capable of containing food, and an air extractor for extracting air from the cavity to make the cavity in a negative pressure state, wherein the cooking appliance further includes a memory, a processor, and a heat preservation and fresh keeping control program of the cooking appliance stored in the memory and operable on the processor, and when the processor executes the heat preservation and fresh keeping control program, the heat preservation and fresh keeping control method of the cooking appliance according to the first aspect of the present invention is implemented.

Because the heat preservation and fresh-keeping control method of the cooking appliance in the first aspect of the invention has the beneficial technical effects, the cooking appliance in the third aspect of the invention enables the environment in the cavity to be in the state of interval change through the matching of the periodic heating and the periodic vacuumizing, so that the adaptation of microorganisms to the environment is not facilitated, the growth and the propagation of the microorganisms are effectively inhibited, the heat preservation time is prolonged, the damage to food can be reduced as much as possible while the growth and the propagation of the microorganisms are inhibited through the periodic interval heating, the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation, the taste of the food is favorably improved, in addition, the air exhaust device works periodically, the air exhaust device does not need to be in the working state all the time, and the service life can be prolonged.

As shown in fig. 4, a cooking appliance 100 according to a fourth embodiment of the present invention includes: an appliance body 10, an air-extracting device 20, a temperature detecting device 30 and a control device 40. The cooking appliance 100 herein may be an electric rice cooker, an electric pressure cooker, an electric stewpan, or the like.

Wherein the appliance body 10 defines a cavity capable of holding food, including but not limited to rice, broth, dish, etc. The air extracting device 20 is used for extracting air in the cavity so as to enable the cavity to be in a negative pressure state. In some embodiments, the air-extracting device 20 may be an air pump. The temperature detecting device 30 is used for detecting the temperature in the cavity, so that the control device 40 controls the heating state of the cooking appliance 100 according to the detection result of the temperature detecting device 30. The control device 40 is configured to control the cooking appliance 100 to heat when the cooking appliance 100 performs a heat preservation operation, determine whether the temperature in the cavity reaches a first preset temperature, control the cooking appliance 100 to stop heating when the temperature in the cavity reaches the first preset temperature, and control the air exhaust device 20 to work. Wherein, the control device 40 is further configured to control the cooking appliance 100 to periodically heat according to the time when the cooking appliance 100 stops heating and the temperature in the cavity, and control the air extractor 20 to periodically operate according to the time when the air extractor 20 operates and the time when the air extractor 20 stops operating.

When the cooking utensil 100 performs the heat preservation operation, if the control device 40 controls the cooking utensil 100 to heat and simultaneously controls the air extractor 20 to extract air, steam is continuously generated in the heating process, the air pressure in the cavity is continuously increased, which is not beneficial to the formation of negative pressure in the cavity, and the negative pressure value in the final cavity is easy to be small. Therefore, according to the cooking apparatus 100 of the embodiment of the present invention, the control device 40 controls the temperature inside the cavity to be heated to the first preset temperature, and controls the air extractor 20 to extract air after the heating is stopped, so that the negative pressure inside the cavity is maintained more favorably.

In some embodiments, the first predetermined temperature T is T, and 50 ℃ ≦ T ≦ 80 ℃, e.g., in some embodiments, the first predetermined temperature T may be 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃, and so forth. In the temperature range, the effect of inhibiting the growth and the reproduction of microorganisms is good, the taste of food is moderate, the food cannot be excessively soft or hard, the damage to the food can be reduced, the food is prevented from being seriously browned, and the temperature range also more meets the temperature requirement of direct eating of most users.

In addition, the control device 40 controls the cooking appliance 100 to periodically heat according to the time when the cooking appliance 100 stops heating and the temperature in the cavity, namely, interval heating is realized, so that the damage to food is reduced as much as possible while the growth and propagation of organisms are effectively inhibited, and the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation.

The control device 40 controls the air extraction device 20 to periodically work according to the working time and the stopping time of the air extraction device 20, namely, the interval air extraction is realized, on one hand, a certain negative pressure environment is continuously maintained in the cavity, the oxygen content is reduced, the osmotic pressure is increased, and therefore the effect of inhibiting the growth of microorganisms is achieved; on the other hand, the interval air exhaust is favorable for continuously increasing the negative pressure value in the cavity and the osmotic pressure, and the environment in the cavity is in the environment with interval change, which is more unfavorable for the microorganism to adapt to the environment, thereby inhibiting the growth and the reproduction of the microorganism and prolonging the heat preservation time. In the working process, the air extracting device 20 does not need to be in a working state all the time, which is beneficial to prolonging the service life of the air extracting device 20.

Because the air exhaust device 20 exhausts air to form a negative pressure state in the cavity, the heating temperature can be lower, the heat preservation time is longer, and the heating stopping time can be longer, thereby being more beneficial to preventing food from browning or taste deterioration. And the air extractor 20 is controlled to work according to the working time and the stopping time of the air extractor 20, so that the heat preservation and fresh-keeping control method is simpler. Therefore, better heat preservation and fresh-keeping effects are realized through a simpler control method.

According to the cooking appliance of the fourth aspect of the invention, when the heat preservation operation is performed, the control device controls the cooking appliance to periodically heat and controls the air exhaust device to periodically work, so that the environment in the cavity is in the state of interval change through the cooperation of the periodic heating and the periodic vacuumizing, the microorganism is not favorably adapted to the environment, the growth and the propagation of the microorganism are effectively inhibited, the heat preservation time is prolonged, the periodic interval heating can inhibit the growth and the propagation of the microorganism, the damage to food is reduced as much as possible, the food is prevented from being seriously browned and the taste of the food is prevented from being deteriorated due to long-time heat preservation, the taste of the food is favorably improved, in addition, the air exhaust device periodically works, is not required to be in the working state all the time, and the service life can be prolonged.

In some embodiments, the cooking appliance 100 further includes a steam pipeline for communicating the cavity of the appliance body 10 with the external atmosphere, and a switch assembly for controlling the communication and closing of the steam pipeline with the external atmosphere, and the control device 40 controls the state switching of the switch assembly to realize the communication and non-communication state switching of the cavity with the external atmosphere.

According to some embodiments of the present invention, when the control device 40 controls the cooking appliance 100 to periodically perform heating according to the time when the cooking appliance 100 stops heating and the temperature in the cavity, the control device controls the cooking appliance 100 to perform heating when the time when the cooking appliance 100 stops heating reaches a first preset time, and controls the cooking appliance 100 to stop heating when the temperature in the cavity reaches the first preset temperature, and so on.

For example, when the cooking appliance 100 performs the heat preservation operation, and the temperature in the cavity reaches the first preset temperature T, the control device 40 controls the cooking appliance 100 to stop heating, and stops the temperature reduction in the cavity during the heating process; when the time for stopping heating of the cooking appliance 100 for the first time reaches a first preset time t1, the control device 40 controls the cooking appliance 100 to heat; after the temperature in the cavity rises to the first preset temperature T again, the control device 40 controls the cooking appliance 100 to stop heating; when the time for stopping heating of the cooking appliance 100 for the second time reaches the first preset time t1, the control device 40 controls the cooking appliance 100 to perform heating … … so as to repeat the cycle until the heat preservation operation process is finished. The time for stopping heating of the cooking appliance 100 is determined by the preset first preset time, so that the control method is simpler.

According to some embodiments of the present invention, when the control device 40 controls the air exhaust device 20 to periodically operate according to the time when the air exhaust device 20 operates and the time when the air exhaust device 20 stops operating, the control device controls the air exhaust device 20 to stop operating when the time when the air exhaust device 20 operates reaches a second preset time, and controls the air exhaust device 20 to operate when the time when the air exhaust device 20 stops operating reaches a third preset time, and so on.

For example, when the cooking appliance 100 performs a heat preservation operation, and after the temperature in the cavity reaches the first preset temperature T, the control device 40 controls the cooking appliance 100 to stop heating and starts the air extraction device 20 to work for the first time, so as to extract air in the cavity, so that the air in the cavity is gradually reduced, and a negative pressure environment is formed; when the time of the first operation of the air extracting device 20 reaches a second preset time t2, the control device 40 controls the air extracting device 20 to stop operating, so that a certain negative pressure environment is maintained in the cavity; when the time for stopping the operation of the air extracting device 20 for the first time reaches the third preset time t3, the control device 40 starts the operation of the air extracting device 20 for the second time; when the time for the second operation of the air extracting device 20 reaches the second preset time t2, the control device 40 controls the air extracting device 20 to stop operating; when the time for stopping the operation of the air extractor 20 for the second time reaches the third preset time t3, the control device 40 starts the operation … … of the air extractor 20 for the third time, and the cycle is repeated until the heat preservation operation process is finished. The heating time and the heating stopping time of the air extracting device 20 are both determined by the preset second preset time and the preset third preset time, so that the control method is simpler.

In some embodiments, the second preset time t2 may satisfy: t2 is more than 0min and less than or equal to 10 min. For example, in some embodiments, the second preset time t2 may be 1min, 2min, 3min, 4min, 5min, 6min, 7min, 8min, 9min, and the like. In the time range, a sufficiently high negative pressure value can be generated in the cavity to ensure the heat preservation and fresh-keeping effects, and the working time of the air extracting device 20 is shorter, which is beneficial to prolonging the service life of the air extracting device 20.

According to some embodiments of the present invention, the control device 40 is further configured to control the cooking appliance 100 to heat when it is necessary to control the air exhaust device 20 to operate while controlling the cooking appliance 100 to heat, and control the air exhaust device 20 to operate after the cooking appliance 100 finishes heating. Because steam is continuously generated in the heating process, the air pressure in the cavity is continuously increased, the formation of negative pressure in the cavity is not facilitated, the control device 40 controls the air exhaust device 20 to exhaust air after heating, the air exhaust process is not influenced by the steam generated in the heating process, the negative pressure is more favorably formed, and the formed negative pressure value is more in accordance with the requirements of heat preservation and fresh keeping.

Other constructions and operations of the cooking appliance 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A heat preservation and fresh keeping control method of a cooking appliance is characterized by comprising an appliance body and an air extracting device, wherein the appliance body defines a cavity to be suitable for containing food, the air extracting device is used for extracting air in the cavity to enable the cavity to be in a negative pressure state, and the heat preservation and fresh keeping control method comprises the following steps:

When the cooking appliance performs heat preservation operation, controlling the cooking appliance to heat and detecting the temperature in the cavity;

judging whether the temperature in the cavity reaches a first preset temperature or not;

if the temperature in the cavity reaches a first preset temperature, controlling the cooking appliance to stop heating, and controlling the air exhaust device to work;

and controlling the cooking appliance to heat periodically according to the time for stopping heating of the cooking appliance and the temperature in the cavity, and controlling the air exhaust device to work periodically according to the time for working and the time for stopping working of the air exhaust device.

2. The method for controlling keeping warm and fresh of a cooking appliance according to claim 1, wherein the step of controlling the cooking appliance to be periodically heated according to the time when the cooking appliance stops heating and the temperature in the cavity comprises the following steps:

when the time that the cooking utensil stops heating reaches first preset time, control the cooking utensil heats to when the temperature in the cavity reaches first preset temperature control the cooking utensil stops heating, so go on repeatedly.

3. The method for controlling keeping temperature and freshness of a cooking appliance according to claim 1, wherein controlling the air-extracting device to periodically operate according to the time when the air-extracting device is operated and the time when the air-extracting device is stopped comprises:

And when the time for the air extracting device to work reaches second preset time, controlling the air extracting device to stop working, and when the time for the air extracting device to stop working reaches third preset time, controlling the air extracting device to work, and repeating the steps.

4. The method for controlling heat preservation and freshness preservation of a cooking appliance according to any one of claims 1 to 3, wherein when the air extractor needs to be controlled to operate while the cooking appliance is controlled to heat, and the air extractor is controlled to operate after the cooking appliance is heated.

5. A computer-readable storage medium, on which a heat and freshness preservation control program of a cooking appliance is stored, the heat and freshness preservation control program, when executed by a processor, implementing a heat and freshness preservation control method of the cooking appliance according to any one of claims 1 to 4.

6. A cooking appliance, comprising an appliance body and an air extracting device, wherein the appliance body defines a cavity suitable for containing food, the air extracting device is used for extracting air in the cavity to enable the cavity to be in a negative pressure state, the cooking appliance further comprises a memory, a processor and a heat and freshness preservation control program of the cooking appliance stored on the memory and capable of running on the processor, and when the processor executes the heat and freshness preservation control program, the heat and freshness preservation control method of the cooking appliance according to any one of claims 1-4 is realized.

7. A cooking appliance, comprising:

an appliance body defining a cavity adapted to hold food;

the air extracting device is used for extracting air in the cavity so as to enable the cavity to be in a negative pressure state;

the temperature detection device is used for detecting the temperature in the cavity;

a control device, which is used for controlling the cooking utensil to heat when the cooking utensil carries out heat preservation operation, judging whether the temperature in the cavity reaches a first preset temperature, controlling the cooking utensil to stop heating when the temperature in the cavity reaches the first preset temperature, and controlling the air exhaust device to work, wherein,

the control device is also used for controlling the cooking appliance to heat periodically according to the time when the cooking appliance stops heating and the temperature in the cavity, and controlling the air exhaust device to work periodically according to the time when the air exhaust device works and the time when the air exhaust device stops working.

8. The cooking appliance according to claim 7, wherein the control means controls the cooking appliance to be heated periodically according to the time when the cooking appliance stops heating and the temperature in the cavity, controls the cooking appliance to be heated when the time when the cooking appliance stops heating reaches a first preset time, and controls the cooking appliance to stop heating when the temperature in the cavity reaches the first preset temperature, and so on.

9. The cooking appliance according to claim 7, wherein the control device controls the pumping device to operate periodically according to the time when the pumping device operates and the time when the pumping device stops, controls the pumping device to stop operating when the time when the pumping device operates reaches a second preset time, and controls the pumping device to operate when the time when the pumping device stops operating reaches a third preset time, and the operation is repeated.

10. The cooking appliance according to any one of claims 7 to 9, wherein the control device is further configured to control the cooking appliance to heat when the air extractor needs to be controlled to operate while the cooking appliance is controlled to heat, and to control the air extractor to operate after the cooking appliance is heated.