阅读说明：本技术 压力烹饪器具的加热控制方法、系统及压力烹饪器具 (Heating control method and system of pressure cooking appliance and pressure cooking appliance ) 是由 顾青松 于 2018-06-20 设计创作，主要内容包括：本发明实施例提供一种压力烹饪器具的加热控制方法、系统及压力烹饪器具,属于厨电控制技术领域,解决了现有技术中在不同海拔地区的压力烹饪器具,由于固定温度的使用,导致的控制压力不满足烹饪要求的问题。所述系统包括：压力开关检测装置,用于检测压力开关的状态；温度检测装置,用于检测压力烹饪器具内的温度；加热装置,用于对压力烹饪器具内的食材进行加热；微控制器,用于以第一加热功率控制加热装置加热；当压力开关检测装置检测到压力开关的状态发生变化时,获取状态变化温度；根据状态变化温度、预设标定压力以及预设目标压力,得到目标温度；根据目标温度,控制加热装置加热。本发明实施例适用于不同海拔高度的压力烹饪器具烹饪食材。(The embodiment of the invention provides a heating control method and system of a pressure cooking appliance and the pressure cooking appliance, belongs to the technical field of kitchen electric control, and solves the problem that in the prior art, the control pressure of the pressure cooking appliance in different altitude areas cannot meet cooking requirements due to the use of fixed temperature. The system comprises: pressure switch detection means for detecting a state of the pressure switch; temperature detection means for detecting a temperature inside the pressure cooking appliance; a heating device for heating the food material in the pressure cooking appliance; the microcontroller is used for controlling the heating device to heat with first heating power; when the pressure switch detection device detects that the state of the pressure switch changes, acquiring state change temperature; obtaining a target temperature according to the state change temperature, the preset calibration pressure and the preset target pressure; and controlling the heating device to heat according to the target temperature. The embodiment of the invention is suitable for cooking food materials by pressure cooking appliances with different altitudes.)

1. A heating control system of a pressure cooking appliance including a pressure switch for sensing a pressure within the pressure cooking appliance and changing its state when the pressure within the pressure cooking appliance reaches a preset calibration pressure, the system comprising:

pressure switch detection means for detecting a state of the pressure switch;

temperature detection means for detecting a temperature inside the pressure cooking appliance;

a heating device for heating the food material in the pressure cooking appliance; and

a microcontroller for:

controlling the heating device to heat with first heating power;

when the pressure switch detection device detects that the state of the pressure switch changes, acquiring the state change temperature detected by the temperature detection device;

obtaining a target temperature according to the state change temperature, the preset calibration pressure and a preset target pressure; and

and controlling the heating device to heat at a heating power smaller than the first heating power according to the target temperature.

2. The system of claim 1, wherein said deriving a target temperature from said state change temperature, said preset calibration pressure, and a preset target pressure comprises:

and obtaining the target temperature according to Ts (T0 + (Ps-P0)/k), wherein Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, and k is a correlation coefficient of pressure and temperature, wherein k is more than or equal to 4 and less than or equal to 6.

3. The system of claim 1, wherein the controlling the heating device to heat at a heating power less than the first heating power based on the target temperature comprises:

judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not;

when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and

controlling the pressure cooking appliance to heat at a third heating power when the temperature in the pressure cooking appliance is greater than the target temperature,

wherein the first heating power, the second heating power and the third heating power are sequentially decreased in magnitude.

4. The system of claim 1, wherein the first heating power is a maximum heating power.

5. The system of claim 3, wherein the third heating power is zero.

6. A heating control method of a pressure cooking appliance, the method comprising:

controlling the pressure cooking appliance to heat at a first heating power;

when the state of the pressure switch is detected to be changed, detecting the corresponding state change temperature in the pressure cooking appliance;

obtaining a target temperature according to the state change temperature, a preset calibration pressure and a preset target pressure; and

and controlling the pressure cooking appliance to heat at a heating power smaller than the first heating power according to the target temperature.

7. The method of claim 6, wherein obtaining a target temperature from the state change temperature, a preset calibration pressure, and a preset target pressure comprises:

and obtaining the target temperature according to Ts (T0 + (Ps-P0)/k), wherein Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, the preset calibration pressure is the pressure in the pressure cooking appliance when the state of the pressure switch is changed, k is a correlation coefficient of the pressure and the temperature, and k is more than or equal to 4 and less than or equal to 6.

8. The method of claim 6, wherein said controlling the pressure cooking appliance to heat at a heating power less than the first heating power according to the target temperature comprises:

judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not;

when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and

controlling the pressure cooking appliance to heat at a third heating power when the temperature in the pressure cooking appliance is greater than the target temperature,

wherein the first heating power, the second heating power and the third heating power are sequentially decreased in magnitude.

9. The method of claim 6, wherein the first heating power is a maximum heating power.

10. The method of claim 8, wherein the third heating power is zero.

11. Pressure cooking appliance, characterized in that it comprises a heating control system of a pressure cooking appliance according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of kitchen electric control, in particular to a heating control method and system of a pressure cooking appliance and the pressure cooking appliance.

Background

The conventional electric pressure cooker generally utilizes the positive correlation between pressure and temperature, adopts a temperature sensor and controls the pressure according to the temperature.

Although the temperature and the pressure in the electric pressure cooker have positive correlation, because the altitude of the place where the product is used is different, when the same food is cooked, the temperature required in the high altitude area is lower, the pressure in the corresponding electric pressure cooker is lower, and the temperature required in the low altitude area is higher, the pressure in the corresponding electric pressure cooker is higher. In the prior art, the pressure in the electric pressure cooker is controlled by fixing the temperature, so that the problems that the product is over-pressurized due to overhigh pressure in a high altitude area and the pressure is insufficient due to overlow pressure in a low altitude area can occur.

Disclosure of Invention

The embodiment of the invention aims to provide a heating control method and system of a pressure cooking appliance and the pressure cooking appliance, which solve the problem that in the prior art, the control pressure of the pressure cooking appliance in different altitude areas cannot meet the cooking requirement due to the use of fixed temperature, and realize flexible cooking of food materials for different altitude.

In order to achieve the above object, an embodiment of the present invention provides a heating control system of a pressure cooking appliance, the pressure cooking appliance including a pressure switch for sensing a pressure in the pressure cooking appliance and changing a state of the pressure cooking appliance when the pressure in the pressure cooking appliance reaches a preset calibration pressure, the system including: pressure switch detection means for detecting a state of the pressure switch; temperature detection means for detecting a temperature inside the pressure cooking appliance; a heating device for heating the food material in the pressure cooking appliance; and a microcontroller for: controlling the heating device to heat with first heating power; when the pressure switch detection device detects that the state of the pressure switch changes, acquiring the state change temperature detected by the temperature detection device; obtaining a target temperature according to the state change temperature, the preset calibration pressure and a preset target pressure; and controlling the heating device to heat according to the target temperature by using heating power smaller than the first heating power.

Further, the obtaining a target temperature according to the state change temperature, the preset calibration pressure and a preset target pressure includes: and obtaining the target temperature according to Ts (T0 + (Ps-P0)/k), wherein Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, and k is a correlation coefficient of pressure and temperature, wherein k is more than or equal to 4 and less than or equal to 6.

Further, the controlling the heating device to heat with a heating power smaller than the first heating power according to the target temperature includes: judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not; when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and when the temperature in the pressure cooking appliance is higher than the target temperature, controlling the pressure cooking appliance to heat with a third heating power, wherein the first heating power, the second heating power and the third heating power are sequentially decreased in size.

Further, the first heating power is a maximum heating power.

Further, the third heating power is zero.

Correspondingly, the embodiment of the invention also provides a heating control method of the pressure cooking appliance, which comprises the following steps: controlling the pressure cooking appliance to heat at a first heating power; when the state of the pressure switch is detected to be changed, detecting the corresponding state change temperature in the pressure cooking appliance; obtaining a target temperature according to the state change temperature, a preset calibration pressure and a preset target pressure; and controlling the pressure cooking appliance to heat according to the target temperature and with heating power smaller than the first heating power.

Further, the obtaining of the target temperature according to the state change temperature, the preset calibration pressure and the preset target pressure includes: and obtaining the target temperature according to Ts (T0 + (Ps-P0)/k), wherein Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, the preset calibration pressure is the pressure in the pressure cooking appliance when the state of the pressure switch is changed, k is a correlation coefficient of the pressure and the temperature, and k is more than or equal to 4 and less than or equal to 6.

Further, the controlling the pressure cooking appliance to heat at a heating power smaller than the first heating power according to the target temperature includes: judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not; when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and when the temperature in the pressure cooking appliance is higher than the target temperature, controlling the pressure cooking appliance to heat with a third heating power, wherein the first heating power, the second heating power and the third heating power are sequentially decreased in size.

Further, the first heating power is a maximum heating power.

Further, the third heating power is zero.

Correspondingly, the embodiment of the invention also provides a pressure cooking appliance, which comprises the heating control system of the pressure cooking appliance.

According to the technical scheme, the state of the pressure switch in the pressure cooking appliance is detected by the pressure switch detection device, the corresponding state change temperature in the pressure cooking appliance is obtained, the target temperature is obtained according to the state change temperature, the preset calibration pressure and the preset target pressure, and the heating device is controlled to heat according to the target temperature. The embodiment of the invention solves the problem that the control pressure of the pressure cooking appliance in different altitude areas can not meet the cooking requirement due to the fixed temperature cooking, and realizes the flexible cooking of food materials aiming at different altitude.

Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.

Drawings

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

fig. 1 is a schematic structural diagram of a heating control system of a pressure cooking appliance according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a heating control method of a pressure cooking appliance according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of another heating control method for a pressure cooking appliance according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.

The principle of the pressure cooking utensil is that the physical phenomenon that the boiling point of liquid can be improved under higher air pressure actually applies pressure to water, so that the water can reach higher temperature without boiling, a high-temperature and high-pressure environment is formed in the utensil, and the efficiency of stewing food is accelerated. However, in the prior art, the control method for the pressure cooking appliance is preset fixed temperature, and cannot be adjusted according to different regions. Especially for areas with different altitudes, the corresponding atmospheric pressures are different, so that the boiling points of water are different according to the positive correlation between the atmospheric pressure and the temperature. If only depending on the same preset temperature to cook, the food cooked in different altitude areas will have different taste, and the phenomena that the food is over-pressurized and over-rotten in high altitude areas and the food is not cooked in low altitude areas because the pressure is too low will occur. Embodiments of the present invention have been made in view of the above problems.

The pressure cooking appliance comprises a pressure switch which is used for sensing the pressure in the pressure cooking appliance and changing the state of the pressure cooking appliance when the pressure in the pressure cooking appliance reaches a preset calibration pressure. Fig. 1 is a schematic structural diagram of a heating control system of a pressure cooking appliance according to an embodiment of the present invention. As shown in fig. 1, the system includes: pressure switch detection means 11 for detecting the state of a pressure switch (not shown); temperature detection means 12 for detecting a temperature inside the pressure cooking appliance; a heating device 13 for heating the food material in the pressure cooking appliance; and a microcontroller 14 for: controlling the heating device to heat with first heating power; when the pressure switch detection device detects that the state of the pressure switch changes, acquiring the state change temperature detected by the temperature detection device; obtaining a target temperature according to the state change temperature, the preset calibration pressure and a preset target pressure; and controlling the heating device to heat according to the target temperature by using heating power smaller than the first heating power.

Wherein, when the pressure switch senses that the pressure in the pressure cooking appliance reaches the preset calibrated pressure, the state of the pressure switch changes, for example, the pressure switch is changed from open to closed or from closed to open.

In addition, after the state change temperature detected by the temperature detection device is acquired, the state change temperature can be stored locally for use in subsequent calculation.

When the target temperature is obtained according to the state change temperature, the preset calibration pressure and the preset target pressure, the target temperature may be obtained according to Ts ═ T0+ (Ps-P0)/k, where Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, and k is a correlation coefficient of pressure and temperature, where k is greater than or equal to 4 and less than or equal to 6.

In the above-described embodiment, when the same pressure cooking appliance is used at different altitudes, since the water boiling point temperatures corresponding to the different altitudes are different, when the state of the pressure switch is changed, the state change temperature in the corresponding pressure cooking appliance at the time of acquisition is also different, so that the target temperature Ts ═ T0+ (Ps-P0)/k corresponding to the preset target pressure is also different. Therefore, the embodiment of the invention effectively solves the problem of different control pressures caused by different altitudes of pressure cooking appliances when a fixed pressure control temperature point is set, and can flexibly cook food materials aiming at different altitudes.

In addition, in an embodiment of the present invention, when the microcontroller controls the heating device to heat at a heating power smaller than the first heating power according to the target temperature, the microcontroller may control the heating device by:

judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not;

when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and

controlling the pressure cooking appliance to heat at a third heating power when the temperature in the pressure cooking appliance is greater than the target temperature,

wherein the first heating power, the second heating power and the third heating power are sequentially decreased in magnitude.

In this embodiment, the food in the pressure cooking appliance can be heated in stages by the state change of the pressure switch and the target temperature. That is, before the state of the pressure switch is changed, the heating device is controlled to heat with a first heating power, and the first heating power can be the maximum heating power. After the state of the pressure switch is changed and before the temperature in the pressure cooking appliance does not reach the target temperature, the pressure cooking appliance is controlled to heat by second heating power, and the second heating power is smaller than the first heating power. After the temperature in the pressure cooking appliance reaches the target temperature, controlling the pressure cooking appliance to heat at a third heating power, wherein the third heating power is smaller than the second heating power. In addition, the third heating power may be zero, that is, the heating device is turned off, and the heating of the food materials in the pressure cooking appliance is stopped.

The embodiment of the invention solves the problem that the control pressure of the pressure cooking appliance in different altitudes can not meet the cooking requirement due to the fixed temperature cooking, realizes flexible cooking of food materials under the condition of different altitudes, and can realize segmented heating of the food materials in the pressure cooking appliance according to the state change of the pressure switch and the target temperature.

Correspondingly, fig. 2 is a schematic flow chart of a heating control method of a pressure cooking appliance according to an embodiment of the present invention. As shown in fig. 2, the method comprises the steps of:

step 201, controlling the pressure cooking appliance to heat at a first heating power;

step 202, when detecting that the state of a pressure switch changes, detecting the corresponding state change temperature in the pressure cooking appliance;

step 203, obtaining a target temperature according to the state change temperature, a preset calibration pressure and a preset target pressure; and

and 204, controlling the pressure cooking appliance to heat at a heating power smaller than the first heating power according to the target temperature.

In step 203, a target temperature is obtained according to the state change temperature, a preset calibration pressure and a preset target pressure, and the target temperature may be obtained according to Ts ═ T0+ (Ps-P0)/k, where Ts is the target temperature, T0 is the state change temperature, Ps is the preset target pressure, P0 is the preset calibration pressure, the preset calibration pressure is the pressure inside the pressure cooking appliance when the state of the pressure switch changes, and k is a correlation coefficient between pressure and temperature, where k is greater than or equal to 4 and less than or equal to 6.

In step 204, controlling the pressure cooking appliance to heat at a heating power less than the first heating power according to the target temperature includes: judging whether the temperature in the pressure cooking appliance is higher than the target temperature or not; when the temperature in the pressure cooking appliance is less than or equal to the target temperature, controlling the pressure cooking appliance to heat at a second heating power; and when the temperature in the pressure cooking appliance is higher than the target temperature, controlling the pressure cooking appliance to heat with a third heating power, wherein the first heating power, the second heating power and the third heating power are sequentially decreased in size.

Namely, the food in the pressure cooking appliance can be heated in a segmented manner through the state change of the pressure switch and the target temperature. The first heating power may be the maximum heating power, and the third heating power may be zero, that is, the heating device is turned off, and the food materials in the pressure cooking appliance are stopped being heated.

For a better understanding of the embodiments of the present invention, fig. 3 shows a flow chart of a heating control method of a pressure cooking appliance. As shown in fig. 3, the method comprises the steps of:

step 301, controlling the pressure cooking appliance to heat with a first heating power;

step 302, judging whether the state of the pressure switch changes, if not, returning to step 301, continuing to control the pressure cooking appliance to heat with the first heating power, if so, implicitly indicating that the pressure in the pressure cooking appliance reaches a preset calibration pressure so that the state of the pressure switch in the pressure cooking appliance changes, and executing step 303;

step 303, detecting a corresponding state change temperature in the pressure cooking appliance;

step 304, obtaining a target temperature according to the state change temperature, the preset calibration pressure and a preset target pressure;

step 305, judging whether the temperature in the pressure cooking appliance is larger than the target temperature, if not, executing step 306, and if so, executing step 307;

step 306, controlling the pressure cooking appliance to heat at a second heating power;

and 307, controlling the pressure cooking appliance to heat at a third heating power.

The embodiment of the invention solves the problem that the control pressure of the pressure cooking appliance in different altitudes can not meet the cooking requirement due to the fixed temperature cooking, realizes flexible cooking of food materials under the condition of different altitudes, and can realize segmented heating of the food materials in the pressure cooking appliance according to the state change of the pressure switch and the target temperature.

Correspondingly, the embodiment of the invention also provides a pressure cooking appliance, which comprises the heating control system of the pressure cooking appliance.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.

Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.