Control method of microwave oven

Abstract

The invention discloses a control method of a microwave oven, the microwave oven comprises a cavity, an exhaust port communicated with the outside is formed in the cavity, and at least one gas sensor is arranged at the exhaust port, the control method of the microwave oven comprises the following steps: starting the microwave oven to perform heating work; gas at the position of the exhaust port is collected; analyzing the collected gas so as to obtain current gas component information; the obtained gas component information accords with the component information of the early warning gas; the concentration value of the current gas is compared with a preset concentration value, and whether the metal sparking phenomenon occurs in the cavity or not is judged according to the comparison result. The method is simple and feasible, and the metal sparking phenomenon of the microwave oven can be effectively detected, so that the safety problem caused by human negligence in the use process of the microwave cooking utensil is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a control method for a microwave oven. Background Art

[0002] Microwave ovens have become an indispensable household appliance in modern kitchens because they heat food quickly and efficiently. However, when using microwave ovens, safety accidents often occur due to the placement of metal utensils or the aging of the microwave oven itself.

[0003] The working principle of a microwave oven is to use a microwave generator to generate microwaves, which stimulate the water molecules and other polar molecules in the food to produce high-frequency collisions and friction, thereby causing the food to heat up rapidly in a short period of time. However, microwaves cannot penetrate metal and will be reflected back. The back-and-forth collisions can cause problems such as sparks and burning of metal utensils, thereby causing damage to the core components of the microwave oven, and in severe cases, can cause a fire.

[0004] In the prior art, most microwave ovens with metal utensil detection functions are rarely launched. On the one hand, the metal detection device is expensive. On the other hand, the detection device needs to be placed in the cavity, which will be interfered by microwaves, making it difficult for the device to function normally. Summary of the invention

[0005] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a control method for a microwave oven. The method is simple and feasible and can effectively detect the metal ignition phenomenon of the microwave oven, thereby improving the safety of microwave cooking appliances caused by human negligence during use.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A control method for a microwave oven, the microwave oven comprising a cavity, an exhaust port communicating with the outside being provided on the cavity, at least one gas sensor being provided at the exhaust port, the control method for the microwave oven comprising the following steps:

[0008] Starting the microwave oven to perform heating;

[0009] Collecting gas at the exhaust port;

[0010] Analyze the collected gas to obtain the current gas composition information;

[0011] Until the obtained gas composition information matches the warning gas composition information;

[0012] The current gas concentration value is compared with the preset concentration value, and whether metal ignition occurs in the cavity is determined based on the comparison result.

[0013] In some embodiments, the step of obtaining the gas composition information until it meets the warning gas condition includes:

[0014] Determine whether the current gas composition information obtained is consistent with the composition information of the warning gas;

[0015] If yes, the current gas concentration value is compared with the preset concentration value;

[0016] If not, continue to detect the gas at the exhaust port position.

[0017] In some embodiments, the step of comparing the current gas concentration value with a preset concentration value and determining whether metal sparking occurs in the cavity according to the comparison result includes:

[0018] Determine whether the current gas concentration value exceeds the preset concentration value;

[0019] If so, it is determined that metal sparking occurs in the cavity;

[0020] If not, it is determined that no metal sparking occurs in the cavity.

[0021] In some embodiments, the step of determining that metal sparking occurs in the cavity comprises:

[0022] The microwave generator of the microwave oven is controlled to stop working.

[0023] In some embodiments, the step of controlling the microwave generator of the microwave oven to stop working comprises:

[0024] The microwave oven is controlled to send out an alarm signal.

[0025] In some embodiments, a metal ignition phenomenon is generated in advance in the microwave oven, and the generated gas is collected to obtain the composition information of the warning gas.

[0026] In some embodiments, the number of the gas sensors is 3, the first gas sensor is suitable for collecting ozone, the second gas sensor is suitable for collecting zinc oxide, and the third gas sensor is suitable for collecting sulfur dioxide.

[0027] In some embodiments, a buzzer is further included, and the buzzer is disposed at a location outside the cavity to emit an alarm signal to the outside.

[0028] In some embodiments, a display is further included, wherein the display is disposed at a location outside the cavity to issue an alarm signal to the outside.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] 1. The control method of the microwave oven of the present invention is simple and feasible, and can effectively detect the metal sparking phenomenon of the microwave oven, thereby improving the safety problem caused by human negligence during the use of microwave cooking utensils. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 1 is a flow chart of a microwave oven control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in combination with the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, but not all of the embodiments. The components of the embodiment of the present invention can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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 the technical solution claimed for protection of the present invention.

[0035] Example:

[0036] like Figure 1As shown, this embodiment provides a control method for a microwave oven, wherein a cavity is defined in the microwave oven, a microwave generator is arranged in the cavity, an exhaust port connected to the outside is opened on the cavity to discharge the gas in the cavity to the outside, and at least one gas sensor is arranged at the exhaust port. When the microwave generator is working, the gas in the cavity is discharged to the outside through the exhaust port, so that the gas sensor monitors the gas flowing through the exhaust port until the currently acquired gas composition information meets the warning gas composition information and the current gas concentration value exceeds the preset concentration value, thereby determining that metal ignition occurs in the cavity. The method is simple and feasible, and can effectively detect the metal ignition phenomenon of the microwave oven, thereby improving the safety of microwave cooking utensils caused by human negligence during use.

[0037] Specifically, it also includes a buzzer, which is arranged at a position outside the cavity to send out an alarm signal.

[0038] Preferably, the device further comprises a display, which is arranged at a position outside the cavity to send out an alarm signal.

[0039] In this embodiment, a buzzer and / or a display is provided at an external position of the microwave oven cavity. If it is determined that metal sparks occur in the cavity, the controller of the microwave oven sends out a sound alarm through the buzzer and / or displays an alarm signal on the display, thereby allowing the operator to quickly determine whether metal sparks occur in the cavity.

[0040] The control method of the microwave oven in this embodiment comprises the following steps:

[0041] Step S101, start the microwave oven to perform heating.

[0042] Step S102, collecting gas at the exhaust port.

[0043] In this embodiment, the operator puts the food to be heated and cooked into the microwave oven, then starts the microwave oven for heating, and then starts the gas sensor to collect the gas at the exhaust port, thereby collecting one or more gases.

[0044] Step S103: Analyze the collected gas to obtain current gas composition information.

[0045] In this embodiment, the gas sensor feeds back the acquired gas data to the controller of the microwave oven, and the controller of the microwave oven analyzes the collected gas to obtain current gas composition information and gas concentration information.

[0046] Preferably, since the placement of baking trays, grills, metal utensils in the cavity and the aging of the cavity itself can cause metal ignition in the cavity of the microwave oven, and when metal ignition occurs in the cavity of the microwave oven, a variety of gases will be generated, that is, the metal ionization ignition process will produce ozone gas, and the metal ablation process will produce zinc oxide, sulfur dioxide and other gases. Therefore, three gas sensors can be set at the exhaust port, wherein the first gas sensor is suitable for collecting ozone, the second gas sensor is suitable for collecting zinc oxide, and the third gas sensor is suitable for collecting sulfur dioxide, so that the current gas composition information can be quickly obtained, and the accuracy of gas collection can be effectively improved. In addition, the number of gas sensors is not limited to 3, and the appropriate number can be selected according to actual needs.

[0047] Step S104, until the acquired gas composition information is consistent with the warning gas composition information.

[0048] Preferably, the steps until the acquired gas composition information meets the conditions of the warning gas include:

[0049] Determine whether the current gas composition information obtained is consistent with the composition information of the warning gas;

[0050] If yes, the current gas concentration value is compared with the preset concentration value;

[0051] If not, continue to detect the gas at the exhaust port.

[0052] In this embodiment, since the metal ignition phenomenon is generated in the microwave oven in advance, the generated gas is collected to obtain the composition information of the warning gas. The warning gas in this embodiment is the gas generated when the metal ignition phenomenon occurs in the cavity of the microwave oven. Specifically, when the metal ignition phenomenon occurs in the cavity of the microwave oven, multiple gases are generated, that is, the metal ionization ignition process generates ozone gas, and the metal ablation process generates gases such as zinc oxide and sulfur dioxide. In this way, the warning gas in this embodiment is preferably ozone gas, zinc oxide gas, and sulfur dioxide gas. Then, by judging whether the composition information of the current gas is any one or more of ozone gas, zinc oxide gas, and sulfur dioxide gas, it is determined whether the current gas composition information meets the composition information of the warning gas.

[0053] Step S105, comparing the current gas concentration value with the preset concentration value, and determining whether metal sparking occurs in the cavity according to the comparison result.

[0054] Preferably, the step of comparing the current gas concentration value with the preset concentration value and determining whether metal ignition occurs in the cavity according to the comparison result includes:

[0055] Determine whether the current gas concentration value exceeds the preset concentration value;

[0056] If so, it is concluded that metal sparking occurs in the cavity;

[0057] If not, it is concluded that no metal sparking occurs in the cavity.

[0058] Further, the steps after determining that metal sparking occurs in the cavity include:

[0059] Control the microwave generator of the microwave oven to stop working;

[0060] Control the microwave oven to send out an alarm signal.

[0061] In this embodiment, after the acquired gas composition information matches the warning gas composition information, it is determined whether the current gas concentration value exceeds the preset concentration value;

[0062] If so, it is concluded that metal sparking occurs in the cavity;

[0063] If not, it is concluded that no metal sparking occurs in the cavity.

[0064] In this embodiment, metal ignition is generated in the microwave oven in advance, and the generated gas is collected to obtain the composition information of the warning gas. At the same time, the gas concentration when the metal ignition occurs is collected and then the gas concentration value is calibrated to ensure the accuracy of gas detection by setting a preset gas concentration signal value, that is, the accuracy of gas detection is ensured by setting a preset concentration value.

[0065] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for controlling a microwave oven, characterized in that: The microwave oven comprises a cavity, an exhaust port communicating with the outside is provided on the cavity, at least one gas sensor is provided at the exhaust port, and the control method of the microwave oven comprises the following steps: Starting the microwave oven to perform heating; Collecting gas at the exhaust port; Analyze the collected gas to obtain the current gas composition information; Until the obtained gas composition information matches the warning gas composition information; The current gas concentration value is compared with the preset concentration value, and whether metal ignition occurs in the cavity is determined based on the comparison result.

2. The method for controlling a microwave oven according to claim 1, characterized in that: The steps until the gas composition information obtained meets the warning gas condition include: Determine whether the current gas composition information obtained is consistent with the composition information of the warning gas; If yes, the current gas concentration value is compared with the preset concentration value; If not, continue to detect the gas at the exhaust port position.

3. The method for controlling a microwave oven according to claim 1, characterized in that: The step of comparing the current gas concentration value with the preset concentration value and determining whether metal ignition occurs in the cavity according to the comparison result includes: Determine whether the current gas concentration value exceeds the preset concentration value; If so, it is determined that metal sparking occurs in the cavity; If not, it is determined that no metal sparking occurs in the cavity.

4. The method for controlling a microwave oven according to claim 3, characterized in that: The steps after determining that metal sparking occurs in the cavity include: The microwave generator of the microwave oven is controlled to stop working.

5. The method for controlling a microwave oven according to claim 4, characterized in that: The step of controlling the microwave generator of the microwave oven to stop working comprises: The microwave oven is controlled to send out an alarm signal.

6. The method for controlling a microwave oven according to claim 1, characterized in that: A metal ignition phenomenon is generated in the microwave oven in advance, and the generated gas is collected to obtain the composition information of the warning gas.

7. The method for controlling a microwave oven according to claim 1, characterized in that: The number of the gas sensors is 3, the first gas sensor is suitable for collecting ozone, the second gas sensor is suitable for collecting zinc oxide, and the third gas sensor is suitable for collecting sulfur dioxide.

8. The method for controlling a microwave oven according to claim 1, characterized in that: A buzzer is also included, and the buzzer is arranged at a position outside the cavity to send out an alarm signal.

9. The method for controlling a microwave oven according to claim 1, characterized in that: A display is also included, and the display is arranged at a position outside the cavity to send out an alarm signal to the outside.

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