Steaming oven heat preservation control method and system and steaming oven

Abstract

The invention relates to the technical field of kitchen appliances, in particular to a steaming oven heat preservation control method and system and a steaming oven. First temperature detection information obtained by conducting temperature detection on the surface of a target heat preservation object through a temperature detection unit is obtained; determining a first surface temperature of the target heat preservation object based on the first temperature detection information; a first timing instruction is sent to a timing unit, so that the timing unit starts timing of first preset time; after timing of the first preset time is finished, second temperature detection information is obtained in a preset period, and the second surface temperature of the target heat preservation object is determined based on the second temperature detection information; and in each preset period, the second surface temperature is compared with the first surface temperature, the heating unit of the steaming and baking oven is controlled to be turned on or turned off based on the comparison result, and in this way, intelligent circulating heating and heat preservation are achieved, it is guaranteed that dishes in the steaming and baking oven cannot be cooled, and the taste and freshness are kept.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a method and system for controlling heat preservation of a steaming oven and a steaming oven. Background Art

[0002] With economic development and social progress, people have higher and higher requirements for food variety and food processing technology. Therefore, steam ovens came into being to meet people's needs for cooking modes such as "steaming, baking, frying, and deep-frying" and different combinations of them. In daily cooking, people are usually not satisfied with making only one dish, but for traditional family kitchens, usually at most 2 to 3 dishes are made at the same time, so there will be a problem that a dish that is finished first will gradually cool down. Therefore, steam ovens are needed to achieve intelligent heat preservation of dishes to ensure the freshness and taste of the dishes. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method and system for controlling the heat preservation of a steam oven, and a steam oven, and the scheme is as follows:

[0004] In one aspect, the present invention provides a method for controlling heat preservation of a steam oven, comprising:

[0005] Acquire first temperature detection information; the first temperature detection information is obtained by the temperature detection unit detecting the temperature of the surface of the target heat preservation object; the target heat preservation object is placed in the cavity of the steam oven; the temperature detection unit is arranged on the inner wall of the steam oven;

[0006] Determine a first surface temperature of the target heat-keeping object based on the first temperature detection information;

[0007] Sending a first timing instruction to the timing unit so that the timing unit starts timing of a first preset time;

[0008] After the first preset time is over, second temperature detection information is obtained at a preset period, and a second surface temperature of the target heat preservation object is determined based on the second temperature detection information;

[0009] In each preset cycle, the second surface temperature is compared with the first surface temperature, and the heating unit of the steam oven is controlled to be turned on or off based on the comparison result.

[0010] Further, comparing the second surface temperature with the first surface temperature, and controlling the heating unit of the steam oven to turn on or off based on the comparison result includes:

[0011] If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is controlled to be turned on until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

[0012] Further, controlling the heating unit of the steam oven to turn on until the comparison result indicates that the second surface temperature is not less than the first surface temperature includes:

[0013] When the heating unit of the steam oven is turned on, a second timing instruction is sent to the timing unit so that the timing unit starts timing the second preset time;

[0014] After the second preset time has elapsed, the heating unit of the steam oven is controlled to be turned off;

[0015] Acquire second temperature detection information, and compare the second surface temperature with the first surface temperature;

[0016] If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is repeatedly controlled to turn on with a second preset time as a cycle until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

[0017] Further, comparing the second surface temperature with the first surface temperature, and controlling the heating unit of the steam oven to turn on or off based on the comparison result further includes:

[0018] Within the current preset cycle, if the comparison result indicates that the second surface temperature is not less than the first surface temperature, a third timing instruction is sent to the timing unit to enable the timing unit to start the timing of the third preset time and control the heating unit of the steam oven to remain turned off until the timing of the third preset time ends.

[0019] Furthermore, the duration of the second preset time and the third preset time is consistent with the duration of the preset cycle.

[0020] On the other hand, the present invention provides a steam oven heat preservation control system, which is applied to the steam oven, and includes: a control unit, a timing unit, a temperature detection unit and a heating unit;

[0021] The control unit is electrically connected to the timing unit, the temperature detection unit and the heating unit respectively;

[0022] The timing unit is used to start timing of a preset time based on a timing instruction issued by the control unit;

[0023] The temperature detection unit is used to detect the temperature of the surface of the target heat preservation object and generate temperature detection information to send to the control unit;

[0024] The heating unit is used to heat the target heat preservation object based on the heating instruction issued by the control unit.

[0025] Furthermore, the temperature detection unit is an infrared sensor.

[0026] Furthermore, the temperature detection unit is arranged on the inner wall of the steam oven.

[0027] Furthermore, the radiation direction of the temperature detection unit is toward the geometric center of the cavity of the steam oven.

[0028] On the other hand, the present invention further provides a steam oven, comprising the steam oven heat preservation control system as described above.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects:

[0030] The present invention first determines the first surface temperature of the target insulation object in the steam oven, and then periodically detects the second surface temperature of the target insulation object and compares it with the first surface temperature. If the second surface temperature is lower than the first surface temperature, heating and insulation are turned on; if the second surface temperature is not lower than the first surface temperature, the next second surface temperature detection and comparison with the first surface temperature are waited for. In this way, intelligent cycle heating and insulation are performed to ensure that the dishes in the steam oven will not get cold and maintain their taste and freshness.

[0031] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, where the same reference numerals generally represent the same components. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic diagram of the overall components of a steam oven heat preservation control system provided by an embodiment of the present invention;

[0034] Figure 2 A schematic flow chart of a method for controlling heat preservation of a steam oven provided by an embodiment of the present invention;

[0035] Figure 3 A schematic flow chart of a method for controlling the heat preservation of a steam oven according to an optional implementation manner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be used in an order other than those illustrated or described herein.

[0038] With economic development and social progress, people have higher and higher requirements for food variety and food processing technology. Therefore, steam ovens came into being to meet people's needs for cooking modes such as "steaming, baking, frying, and deep-frying" and different combinations of them. In daily cooking, people are usually not satisfied with making only one dish, but for traditional family kitchens, usually 2 to 3 dishes are made at the same time, so there will be a problem that a dish that is finished first will gradually cool down. The existing steam oven insulation mode uses a fixed temperature plus an inner tank temperature detection method to adjust the insulation temperature to achieve insulation. It is not smart enough and may cause the food to be reheated after it cools down, affecting the taste and freshness of the food. Therefore, a steam oven is needed to realize intelligent insulation of dishes to ensure the freshness and taste of the dishes.

[0039] In order to solve the above problems, the present invention provides a method and system for controlling the heat preservation of a steam oven and a steam oven, Figure 1 As shown, the control system includes a control unit, a timing unit, a temperature detection unit and a heating unit.

[0040] The control unit is a control unit of the steam oven, such as a main control MCU, including hardware and software, and can generate and transmit instructions and information by sending and receiving electric signals. The control unit is electrically connected to the timing unit, the temperature detection unit and the heating unit respectively.

[0041] The timing unit is used to start timing of a preset time based on a timing instruction issued by the control unit; the timing unit may be a timer.

[0042] The temperature detection unit is used to detect the temperature of the surface of the target heat preservation object and generate temperature detection information to send to the control unit, and the temperature detection information includes the surface temperature of the food. The temperature detection unit can be an infrared sensor, such as a thermocouple, a thermal imager, a photodiode, etc., and its working principle is usually based on the infrared radiation emitted by the object. These radiations can be detected by the infrared sensor and converted into electrical signals to generate temperature detection information. In the embodiment of the present invention, the temperature detection unit is arranged on the inner wall of the steam oven cavity, a hole is opened on the inner wall of the steam oven, and the temperature detection unit is installed. The radiation direction of the temperature detection unit is toward the geometric center of the steam oven cavity. Usually, the dishes are placed in the middle position inside the steam oven, so the temperature detection unit can measure the surface temperature of the food placed in the steam oven without contacting the food, ensuring accurate temperature detection without pollution.

[0043] The heating unit is used to heat the target insulation object based on the heating instruction issued by the control unit. The heating unit can be a heating tube in the steam oven. One or more heating tubes can be provided. Multiple heating tubes can achieve all-round heating of food, improve heating efficiency, and ensure heating effect.

[0044] The control unit obtains the temperature detection information sent by the temperature detection unit, and controls the timing unit and the heating unit based on the temperature detection information to achieve intelligent heating and heat preservation of food. Next, the control method for heat preservation of the steam oven according to the embodiment of the present invention is described in detail.

[0045] refer to Figure 2 , which shows a flow chart of a method for controlling the heat preservation of a steam oven provided by an embodiment of the present invention. It should be noted that this specification provides method operation steps as described in the embodiment or flow chart, but more or fewer operation steps may be included based on conventional or non-creative labor. The sequence of steps listed in the embodiment is only one way of executing the sequence of many steps and does not represent the only execution sequence. When the system device or product is executed in practice, it can be executed in sequence or in parallel according to the method shown in the embodiment or the accompanying drawings (for example, a parallel processor or a multi-threaded processing environment). The method for controlling the heat preservation of a steam oven provided by an embodiment of the present invention includes:

[0046] S201, obtaining first temperature detection information; the first temperature detection information is obtained by a temperature detection unit detecting the temperature of a surface of a target heat preservation object; the target heat preservation object is placed in a cavity of a steam oven; and the temperature detection unit is disposed on an inner wall of the steam oven.

[0047] Specifically, the control unit obtains first temperature detection information obtained by the temperature detection unit performing temperature detection on the surface of the target insulation object, the target insulation object is the dish placed in the steamer oven cavity, the temperature detection unit is arranged on the inner wall of the steamer oven cavity, a hole is opened on the inner wall of the steamer oven, and the temperature detection unit is installed, and the radiation direction of the temperature detection unit is toward the geometric center of the steamer oven cavity.

[0048] S202: Determine a first surface temperature of the target heat-keeping object based on first temperature detection information.

[0049] The temperature detection information includes the surface temperature of the target heat preservation object. The control unit analyzes the first temperature detection information to obtain the first surface temperature of the target heat preservation object as the initial temperature of the target heat preservation object. The first temperature detection information is detected when the target heat preservation object is placed in the steam oven and the heat preservation mode is turned on. The subsequent heat preservation is heated and kept warm based on the first surface temperature, that is, the surface temperature of the target heat preservation object is ensured not to be lower than the first surface temperature.

[0050] S203: Send a first timing instruction to the timing unit, so that the timing unit starts timing a first preset time.

[0051] Specifically, after obtaining the first surface temperature of the target insulation object, the control unit sends a first timing instruction to the technical unit. The timing unit responds to the first timing instruction to start the timing of the first preset time. The duration of the first preset time is set according to actual needs. In order to ensure that the temperature of the food is significantly reduced, the duration of the first preset time should not be too long. In the embodiment of the present invention, the duration of the first preset time is set to 10s. When the timing unit starts timing, if the duration of the first preset time has not been reached, the timing continues until the duration of the first preset time is reached.

[0052] S204, after the first preset time is over, second temperature detection information is obtained at a preset period, and a second surface temperature of the target heat-insulating object is determined based on the second temperature detection information.

[0053] Specifically, after the timing of the first preset time ends, the control unit starts to obtain the second temperature detection information generated by the temperature detection unit performing temperature detection on the target insulation object at a preset period, and parses the first temperature detection information to obtain the second surface temperature of the target insulation object. In one possible manner, the preset period is set according to actual needs. In some possible embodiments, the preset period is set to 10s per period.

[0054] S205, in each preset cycle, comparing the second surface temperature with the first surface temperature, and controlling the heating unit of the steam oven to turn on or off based on the comparison result.

[0055] Specifically, in each preset period, the second surface temperature is compared with the first surface temperature to obtain a comparison result. The second surface temperature is the surface temperature of the target heat preservation object after being left for a first preset time, which may be consistent with the first surface temperature or may be lower than the first surface temperature. Based on the comparison result, it is determined whether the target heat preservation object needs to be heated and kept warm, so as to control the heating unit of the steam oven to be turned on or off.

[0056] refer to Figure 3 In a possible implementation, step S205 may include:

[0057] If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is controlled to be turned on until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

[0058] Specifically, if the comparison result indicates that the second surface temperature is lower than the first surface temperature, it indicates that it is necessary to start heating and keeping the target heat preservation object. The control unit sends a heating instruction to the heating unit of the steam oven. The heating unit responds to the heating instruction and starts heating the target heat preservation object until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

[0059] In a possible implementation, controlling the heating unit of the steam oven to turn on until the comparison result indicates that the second surface temperature is not less than the first surface temperature includes:

[0060] When the heating unit of the steam oven is turned on, a second timing instruction is sent to the timing unit so that the timing unit starts timing the second preset time;

[0061] After the second preset time has elapsed, the heating unit of the steam oven is controlled to be turned off;

[0062] Acquire second temperature detection information, and compare the second surface temperature with the first surface temperature;

[0063] If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is repeatedly controlled to turn on with a second preset time as a cycle until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

[0064] Specifically, when the heating unit responds to the heating instruction and starts to heat the target heat preservation object, that is, when the heating unit is turned on, the control unit sends a second timing instruction to the timing unit to enable the timing unit to start the timing of the second preset time for timing the heating time. After the timing of the second preset time ends, the control unit first controls the heating unit to turn off, then obtains the second temperature detection information, and compares the second surface temperature with the first surface temperature again. If the comparison result indicates that the second surface temperature is less than the first surface temperature, the heating unit of the steam oven is repeatedly controlled to turn on with the second preset time as a cycle, which means that the heating unit is turned on for heating for the second preset time and then turned off. As long as the comparison result indicates that the second surface temperature is less than the first surface temperature, the heating unit is turned on again for heating for the second preset time and then turned off, so as to form a cycle until the comparison result indicates that the second surface temperature is not less than the first surface temperature, and the heating unit is kept turned off.

[0065] Continue to refer Figure 3 In a possible implementation, comparing the second surface temperature with the first surface temperature, and controlling the heating unit of the steam oven to turn on or off based on the comparison result further includes:

[0066] Within the current preset cycle, if the comparison result indicates that the second surface temperature is not less than the first surface temperature, a third timing instruction is sent to the timing unit to enable the timing unit to start the timing of the third preset time and control the heating unit of the steam oven to remain turned off until the timing of the third preset time ends.

[0067] Specifically, within the current preset cycle, if the comparison result indicates that the second surface temperature is not less than the first surface temperature, it indicates that the target insulation object does not need to be heated and kept warm temporarily, and the control unit sends a third timing instruction to the timing unit to enable the timing unit to start the timing of the third preset time. At this time, the heating unit of the steam oven is controlled to remain in a closed state, that is, no heating and insulation is required, until the timing of the third preset time ends, and then the second temperature detection information is detected again, and the step of comparing the second temperature detection information with the first temperature detection information is performed. If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is repeatedly controlled to be turned on with the second preset time as a cycle until the comparison result indicates that the second surface temperature is not lower than the first surface temperature. If the comparison result indicates that the second surface temperature is not lower than the first surface temperature, the heating unit is kept closed and the timing of the third preset time is started, thus forming a cycle.

[0068] In a possible implementation manner, the duration of the second preset time and the third preset time is consistent with the duration of the preset period.

[0069] Through the above-mentioned implementation mode, the present invention first determines the first surface temperature of the target insulation object in the steam oven, and then periodically detects the second surface temperature of the target insulation object and compares it with the first surface temperature. If the second surface temperature is lower than the first surface temperature, heating and insulation are turned on; if the second surface temperature is not lower than the first surface temperature, the next second surface temperature detection and comparison with the first surface temperature are waited for. In this way, intelligent cycle heating and insulation are performed to ensure that the dishes in the steam oven will not cool down and maintain their taste and freshness.

[0070] On the other hand, the present invention provides a steam oven heat preservation control system, which is applied to the steam oven, and includes: a control unit, a timing unit, a temperature detection unit and a heating unit;

[0071] The control unit is electrically connected to the timing unit, the temperature detection unit and the heating unit respectively;

[0072] The timing unit is used to start timing of a preset time based on a timing instruction issued by the control unit;

[0073] The temperature detection unit is used to detect the temperature of the surface of the target heat preservation object and generate temperature detection information to send to the control unit;

[0074] The heating unit is used to heat the target heat preservation object based on the heating instruction issued by the control unit.

[0075] Specifically, the control unit is a control unit of the steam oven, such as a main control MCU, including hardware and software, and can generate and transmit instructions and information by sending and receiving electric signals. The control unit is electrically connected to the timing unit, the temperature detection unit and the heating unit respectively.

[0076] The timing unit is used to start timing of a preset time based on a timing instruction issued by the control unit; the timing unit may be a timer.

[0077] The temperature detection unit is used to detect the temperature of the surface of the target heat preservation object and generate temperature detection information to send to the control unit, and the temperature detection information includes the surface temperature of the food. In a possible embodiment, the temperature detection unit is an infrared sensor, such as a thermocouple, a thermal imager, a photodiode, etc., and its working principle is usually based on the infrared radiation emitted by the object. These radiations can be detected by the infrared sensor and converted into electrical signals to generate temperature detection information. In a possible embodiment, the temperature detection unit is arranged on the inner wall of the steam oven. A hole is opened on the inner wall of the steam oven and the temperature detection unit is installed. Furthermore, the radiation direction of the temperature detection unit is toward the geometric center of the steam oven cavity. Usually, the dishes are placed in the middle position inside the steam oven, so the temperature detection unit can measure the surface temperature of the food placed in the steam oven without contacting the food, ensuring accurate temperature detection without pollution.

[0078] The heating unit is used to heat the target insulation object based on the heating instruction issued by the control unit. The heating unit can be a heating tube in the steam oven. One or more heating tubes can be provided. Multiple heating tubes can achieve all-round heating of food, improve heating efficiency, and ensure heating effect.

[0079] On the other hand, the present invention further provides a steam oven, comprising the steam oven heat preservation control system as described above.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling heat preservation of a steam oven, characterized in that: include Acquire first temperature detection information; the first temperature detection information is obtained by a temperature detection unit detecting the temperature of a surface of a target heat preservation object; the target heat preservation object is placed in a cavity of a steam oven; the temperature detection unit is disposed on an inner wall of the steam oven; Determine a first surface temperature of the target heat-keeping object based on the first temperature detection information; Sending a first timing instruction to the timing unit so that the timing unit starts timing a first preset time; After the first preset time is over, obtaining second temperature detection information at a preset period, and determining a second surface temperature of the target heat-insulating object based on the second temperature detection information; In each of the preset cycles, the second surface temperature is compared with the first surface temperature, and the heating unit of the steam oven is controlled to be turned on or off based on the comparison result.

2. The method for controlling the heat preservation of a steam oven according to claim 1, characterized in that: The comparing the second surface temperature with the first surface temperature and controlling the heating unit of the steam oven to turn on or off based on the comparison result comprises: If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is controlled to be turned on until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

3. The method for controlling the heat preservation of a steam oven according to claim 2, characterized in that: The controlling the heating unit of the steam oven to turn on until the comparison result indicates that the second surface temperature is not less than the first surface temperature comprises: When the heating unit of the steam oven is turned on, a second timing instruction is sent to the timing unit to enable the timing unit to start timing of a second preset time; After the second preset time has elapsed, controlling the heating unit of the steam oven to be turned off; Acquire the second temperature detection information, and compare the second surface temperature with the first surface temperature; If the comparison result indicates that the second surface temperature is lower than the first surface temperature, the heating unit of the steam oven is repeatedly controlled to be turned on with the second preset time as a cycle until the comparison result indicates that the second surface temperature is not lower than the first surface temperature.

4. The method for controlling the heat preservation of a steam oven according to claim 3, characterized in that: The comparing the second surface temperature with the first surface temperature and controlling the heating unit of the steam oven to turn on or off based on the comparison result further includes: Within the current preset period, if the comparison result indicates that the second surface temperature is not less than the first surface temperature, a third timing instruction is sent to the timing unit to enable the timing unit to start the timing of the third preset time and control the heating unit of the steam oven to remain turned off until the timing of the third preset time ends.

5. The method for controlling the heat preservation of a steam oven according to claim 4, characterized in that: The duration of the second preset time and the third preset time is consistent with the duration of the preset period.

6. A steam oven heat preservation control system, applied to a steam oven, characterized in that: include: A control unit, a timing unit, a temperature detection unit and a heating unit; The control unit is electrically connected to the timing unit, the temperature detection unit and the heating unit respectively; The timing unit is used to start timing of a preset time based on a timing instruction issued by the control unit; The temperature detection unit is used to detect the temperature of the surface of the target heat preservation object and generate temperature detection information to send to the control unit; The heating unit is used to heat the target heat-keeping object based on the heating instruction issued by the control unit.

7. The steam oven heat preservation control system according to claim 6, characterized in that: The temperature detection unit is an infrared sensor.

8. The heat preservation control system of the steam oven according to claim 7, characterized in that: The temperature detection unit is arranged on the inner wall of the steam oven.

9. The steam oven heat preservation control system according to claim 8, characterized in that: The radiation direction of the temperature detection unit is toward the geometric center of the cavity of the steam oven.

10. A steam oven, characterized in that: It comprises a steam oven heat preservation control system as described in any one of claims 6 to 9.

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