Electromagnetic oven

Abstract

The embodiment of the specification provides an induction cooker. The induction cooker comprises an induction cooker body, a processor, an ultrasonic transmitting unit, an ultrasonic receiving unit and a buzzer, the ultrasonic transmitting unit is used for transmitting an ultrasonic detection signal in a room; the ultrasonic receiving unit is used for receiving an ultrasonic feedback signal fed back by an object in a room aiming at the ultrasonic detection signal; the buzzer is used for controlling the buzzer to send out an alarm signal by the processor under the condition that the induction cooker body works for a preset working time length and the time that the ultrasonic feedback signal tends to be gentle is longer than a first preset time length; the ultrasonic transmitting unit, the ultrasonic receiving unit and the buzzer are connected with the processor; and a power line of the induction cooker body is connected with the processor. According to the technical scheme provided by the embodiment of the invention, a fire hazard caused by continuous high temperature of a common induction cooker under the condition of no supervision can be avoided to a certain extent.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of household appliances, and specifically to an induction cooker. Background Art

[0002] More and more people are using induction cookers for boiling water, cooking, and other tasks. However, when cooking soup or stewing, users may leave the cooker to do other things and forget to turn it off. The continued combustion of an induction cooker can cause a fire, primarily because its high temperature can ignite surrounding flammable materials (such as paper, plastic, and fabric). Furthermore, if the induction cooker's internal wiring or components malfunction due to overheating, short circuits or sparks may occur, causing fire accidents. Induction cookers that are left unmonitored for extended periods can also easily overcook or even burn food, releasing smoke and harmful gases, further increasing the risk of fire. Summary of the Invention

[0003] In view of this, multiple embodiments of this specification are dedicated to providing an induction cooker that can, to a certain extent, avoid fires caused by continuous high temperatures in ordinary induction cookers when left unsupervised.

[0004] An embodiment of the present specification proposes an induction cooker, which includes: an induction cooker body, a processor, an ultrasonic transmitting unit, an ultrasonic receiving unit, and a buzzer; the ultrasonic transmitting unit is used to send an ultrasonic detection signal in a room; the ultrasonic receiving unit is used to receive an ultrasonic feedback signal fed back by an object in the room in response to the ultrasonic detection signal; the buzzer is used to control the processor to send an alarm signal when the induction cooker body has been working for a preset working time and the time for the ultrasonic feedback signal to become flat is greater than a first preset time; the ultrasonic transmitting unit, ultrasonic receiving unit, and the buzzer are connected to the processor; and the power cord of the induction cooker body is connected to the processor.

[0005] In some embodiments, the induction cooker further includes a power-off module, the two ends of which are respectively connected to the power cord of the induction cooker body and the processor; the power-off module is used to control the processor to disconnect the power-off module from the power cord of the induction cooker body when the duration of the buzzer sending an alarm signal is greater than or equal to a second preset duration.

[0006] In some embodiments, the ultrasound transmitting unit is a speaker.

[0007] In some embodiments, the ultrasound receiving unit is a microphone.

[0008] In some embodiments, the induction cooker further includes a communication unit, which is configured to send a notification message indicating that the working time of the induction cooker has reached an upper limit to a smart device held by a user.

[0009] In some embodiments, the induction cooker further includes a gravity sensing device, which is used to sense the weight carried by the induction cooker body and feed back the weight data to the processor so that the processor can control the preset working time according to the weight data.

[0010] In some embodiments, a through hole is provided on a side of the induction cooker body, and the ultrasonic transmitting unit and the ultrasonic receiving unit are provided beside the through hole.

[0011] The embodiment of this specification provides an induction cooker. First, when the power is turned on, the user can use the induction cooker to make soup, stew, etc. At this time, the ultrasonic transmitting unit transmits an ultrasonic detection signal outward, and then the ultrasonic receiving unit receives the ultrasonic feedback signal reflected by the object in the space in response to the ultrasonic detection signal. Since the sound has a Doppler effect, at this time, the processor can determine whether there is anyone active near the induction cooker based on the ultrasonic feedback signal. If the working time of the induction cooker is equal to the preset working time, if it is determined based on the Doppler effect of the sound and the analysis based on the ultrasonic feedback signal that there is no one near the induction cooker, the buzzer will be triggered to emit a buzzing sound, which can remind the user to prevent the food in the pot from scorching and prevent the induction cooker from overworking and causing a fire, thereby improving the safety of using the induction cooker to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shown is a schematic diagram of an induction cooker structure provided by one embodiment.

[0013] Figure 2 Shown is a schematic diagram of an electromagnetic circuit structure provided by another embodiment.

[0014] Figure 3 Shown is a schematic diagram of the positions of the through holes on the side of an induction cooker provided by one embodiment.

[0015] Description of reference numerals:

[0016] 10. Induction cooker body; 20. Processor; 21. Ultrasonic transmitting unit; 22. Ultrasonic receiving unit; 23. Buzzer; 30. Power-off module; 40. Communication unit; 50. Gravity sensing device; 60. Through hole. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solutions of this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this specification.

[0018] Currently, more and more users are turning to induction cookers for boiling water, cooking, and other purposes. However, when cooking soup or stewing, users may leave the induction cooker to do other things and forget to turn it off, which can cause the food in the pot to burn. Furthermore, the continued combustion of the induction cooker can cause fires, primarily because the high temperature can ignite surrounding flammable materials (such as paper, plastic, and fabric). Furthermore, if the internal circuits or components of the induction cooker malfunction due to overheating, short circuits or sparks may occur, causing fire accidents. Induction cookers that are not monitored for extended periods of time can also easily cause food to overcook or even burn, releasing smoke and harmful gases, further increasing the risk of fire.

[0019] Therefore, the embodiments of this specification provide an induction cooker, which can, on the one hand, prevent the water in the pot from drying up and causing the food to burn, and on the other hand, can also prevent the induction cooker from malfunctioning due to long-term operation, which may further lead to the occurrence of a fire.

[0020] See also Figure 1 , an embodiment of the present specification provides an induction cooker, which may include: an induction cooker body 10, a processor 20, an ultrasonic transmitting unit 21, an ultrasonic receiving unit 22, and a buzzer 23; the ultrasonic transmitting unit 21 is used to send an ultrasonic detection signal in the room; the ultrasonic receiving unit 22 is used to receive an ultrasonic feedback signal fed back by an object in the room in response to the ultrasonic detection signal; the buzzer 23 is used to control the processor 20 to send an alarm signal when the induction cooker body 10 has been working for a preset working time and the time for the ultrasonic feedback signal to become flat is greater than a first preset time; the ultrasonic transmitting unit 21, the ultrasonic receiving unit 22 and the buzzer 23 are connected to the processor 20; and the power cord of the induction cooker body 10 is connected to the processor 20.

[0021] In some cases, when using an induction cooker for stewing or making soup, people tend to be less likely to keep an eye on the pot and instead engage in other activities. This can cause the food in the pot to burn and scorch due to prolonged cooking. Furthermore, the induction cooker's continuous operation can cause the cooker itself to malfunction, potentially leading to a fire. Therefore, a device is needed that can monitor the presence of people around the induction cooker while it is operating. If no one is around for an extended period, an alarm signal can be issued to alert the user.

[0022] In this embodiment, the induction cooker body 10 can be a common induction cooker, which is a kitchen appliance that uses the principle of electromagnetic induction to heat pots. It generates high-frequency electromagnetic waves to generate eddy currents in the metal material in the pot, thereby achieving rapid heating.

[0023] In this embodiment, the ultrasonic transmitting unit 21 can be a piezoelectric ultrasonic transmitter, a magnetostrictive ultrasonic transmitter, an electromagnetic ultrasonic transmitter, a pneumatic ultrasonic transmitter, a speaker, etc. The embodiment of this specification does not limit the specific form of the ultrasonic transmitting unit 21.

[0024] In this embodiment, the ultrasonic receiving unit 22 may be a piezoelectric ultrasonic receiver, a magnetostrictive ultrasonic receiver, an electromagnetic ultrasonic receiver, a pneumatic ultrasonic receiver, a microphone, etc. The embodiment of this specification does not limit the specific form of the ultrasonic receiving unit 22.

[0025] In this embodiment, the buzzer 23 is used to detect that the frequency change of the ultrasonic feedback signal received by the ultrasonic receiving unit 22 by the processor 20 is small within a period of time, indicating that there is no human activity during this period or the distance between the person and the induction cooker is not close enough to monitor the induction cooker. This time period can be set to 3-5 minutes. Of course, it can also be set according to specific needs. The embodiment of this specification does not limit the specific time of the frequency change amplitude. At the same time, the buzzer 23 emits an alarm signal similar to a buzzing sound to remind the user to pay attention to the situation inside the pot.

[0026] In this embodiment, the processor 20 is configured to send instructions to the ultrasonic transmitting unit 21 and the ultrasonic receiving unit 22. The processor 20 is also configured to process the ultrasonic feedback signal received by the ultrasonic receiving unit 22. If the frequency of the ultrasonic feedback signal fluctuates slightly over a period of time, the processor 20 controls the buzzer 23 to emit an alarm signal, allowing the user to promptly detect the problem.

[0027] In this embodiment, when the induction cooker is powered on and operating, and the cooker's combustion reaches a preset operating time, the ultrasonic transmitting unit 21 is controlled to emit an ultrasonic signal, and the ultrasonic receiving unit 22 receives the reflected signal of the ultrasonic signal, generating an ultrasonic feedback signal. This ultrasonic feedback signal can be processed to determine the presence of a person. If the ultrasonic feedback signal remains flat for a first preset time, it indicates that the induction cooker is no longer within the user's monitoring range. At this time, the buzzer 23 emits a buzzing sound to remind the user to pay attention to the food cooking in the pot and avoid accidents.

[0028] In some embodiments, the induction cooker may further include a power-off module 30, the two ends of which are respectively connected to the power cord of the induction cooker body 10 and the processor 20; the power-off module 30 is used to control the processor 20 to disconnect the power-off module 30 from the power cord of the induction cooker body 10 when the duration of the buzzer 23 emitting an alarm signal is greater than or equal to a second preset duration.

[0029] See also Figure 2 In this embodiment, if the user does not take timely action and is not within the monitoring range of the induction cooker, a power-off module 30 can be added to prevent the induction cooker from burning for a long time and causing accidents. If no one takes further action on the induction cooker within a period of time (greater than or equal to a second preset time period) after the alarm signal is issued, the power-off module 30 controls the induction cooker to disconnect from the power supply, thereby preventing accidents.

[0030] In some cases, the ultrasonic transmitting unit 21 may be a speaker.

[0031] In this embodiment, the speaker is a device specifically designed to transmit ultrasonic signals. They typically have high-frequency response capabilities and can operate in a frequency range of tens of kilohertz to several megahertz. When an ultrasonic signal is input into the ultrasonic speaker, it converts the signal into ultrasonic waves and transmits them. The speaker can also be used in an alarm unit to emit an audible sound to the outside world.

[0032] In some embodiments, the ultrasound receiving unit 22 is a microphone.

[0033] In this embodiment, ultrasonic signals refer to high-frequency signals exceeding the human audible frequency range (20 Hz-20 kHz). Microphones, such as piezoelectric microphones or quartz microphones, are designed with high frequency response capabilities and can receive ultrasonic signals. These microphones typically operate in the frequency range of tens of kilohertz to several megahertz.

[0034] In some embodiments, the induction cooker may further include a communication unit 40, which is configured to send a notification message indicating that the working time of the induction cooker has reached an upper limit to a smart device held by a user.

[0035] See also Figure 2 In this embodiment, since the user is far away from the induction cooker, he may forget that the induction cooker is still working. At this time, a communication module can be built into the induction cooker. If no one takes further measures on the induction cooker within a period of time (greater than or equal to the second preset time length) after the alarm signal is issued, the communication unit 40 is used to send the information that the induction cooker is still working to the user's mobile phone.

[0036] In some embodiments, the induction cooker may further include a gravity sensing device 50, which is used to sense the weight carried by the induction cooker body 10 and feed back the weight data to the processor 20 so that the processor 20 can control the preset working time according to the weight data.

[0037] See also Figure 2 In this embodiment, the stewing time can be determined based on the total amount of food and water in the pot, thereby preventing the fire from being turned off before it is cooked when there is a lot of food, and preventing the pot from being burnt due to cooking for too long when there is less food. Therefore, a gravity sensing device 50 can be set on the induction cooker panel to sense the total amount of food and water in the pot, and then the preset working time is determined based on this. Of course, the preset working time can also be determined based on the firepower and the weight of the food and water in the pot. In general, the greater the total amount of food and water in the pot and the smaller the firepower, the longer the preset working time can be set; if the total amount of food and water in the pot is smaller and the firepower is higher, the preset working time needs to be set shorter.

[0038] In some embodiments, a through hole 60 may be provided on a side of the induction cooker body 10 , and the ultrasonic transmitting unit 21 and the ultrasonic receiving unit 22 are disposed beside the through hole 60 .

[0039] See also Figure 3 Since sound is not penetrable, it can be reflected after being reflected by the wall. Therefore, in order to ensure better sound transmission and reception effects, the ultrasonic transmitting unit 21 and the ultrasonic receiving unit 22 can be placed together and provided with a through hole 60 so that the ultrasonic transmitting unit 21 can transmit the sound and the ultrasonic receiving unit 22 can better receive the ultrasonic feedback signal.

[0040] The descriptions of the various embodiments of this specification are made in a progressive manner. Different embodiments focus on describing the parts that are different from other embodiments. After reading this specification, those skilled in the art will know that the various embodiments in this specification, as well as the various technical features disclosed in the embodiments, can be combined in more ways. To make the description concise, not all possible combinations of the various technical features in the embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0042] The various embodiments in this specification emphasize the differences between the various embodiments, and the various embodiments can be interpreted in comparison with each other. Any combination of the various embodiments in this specification based on general technical knowledge by those skilled in the art is within the scope of this specification.

[0043] The foregoing description is merely an embodiment of the present invention and is not intended to limit the scope of the claims. Persons skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements within the spirit and principles of the present invention are intended to be encompassed by the claims.

Claims

1. An induction cooker, characterized in that: The induction cooker comprises: an induction cooker body (10), a processor (20), an ultrasonic transmitting unit (21), an ultrasonic receiving unit (22), and a buzzer (23); The ultrasonic transmitting unit (21) is used to send ultrasonic detection signals in the room; The ultrasonic receiving unit (22) is used to receive an ultrasonic feedback signal fed back by an object in the room in response to the ultrasonic detection signal; The buzzer (23) is used for controlling the processor (20) to emit an alarm signal when the induction cooker body (10) has been operating for a preset operating time and the ultrasonic feedback signal has been flat for a time period greater than a first preset time period; The ultrasonic transmitting unit (21), the ultrasonic receiving unit (22) and the buzzer (23) are connected to the processor (20); and the power line of the induction cooker body (10) is connected to the processor (20).

2. The induction cooker according to claim 1, characterized in that The induction cooker further comprises a power-off module (30), two ends of which are respectively connected to a power line of the induction cooker body (10) and the processor (20); The power-off module (30) is used for controlling the processor (20) to disconnect the power cord from the induction cooker body (10) when the duration of the buzzer (23) emitting the alarm signal is greater than or equal to a second preset duration.

3. The induction cooker according to claim 1, characterized in that The ultrasonic transmitting unit (21) is a loudspeaker.

4. The induction cooker according to claim 1, characterized in that The ultrasonic receiving unit (22) is a microphone.

5. The induction cooker according to claim 1, characterized in that The induction cooker further comprises a communication unit (40), and the communication unit (40) is used to send notification information indicating that the operating time of the induction cooker has reached an upper limit to a smart device held by a user.

6. The induction cooker according to claim 1, characterized in that The induction cooker further comprises a gravity sensing device (50), wherein the gravity sensing device (50) is used to sense the weight carried by the induction cooker body (10) and feed back the weight data to the processor (20), so that the processor (20) can control the preset working time according to the weight data.

7. The induction cooker according to claim 1, characterized in that A through hole (60) is provided on the side of the induction cooker body (10), and the ultrasonic transmitting unit (21) and the ultrasonic receiving unit (22) are arranged beside the through hole (60).

Images