Cooking state detection equipment and cooking device
By setting up light sources and receiving modules outside the oven, multiple reflection circuits are formed using the reflective surface to detect the gas concentration in the oven, and combining temperature information, the problems of short life of traditional oven sensors and complex structure of external devices are solved, achieving high precision, Low-cost cooking status detection.
Patent Information
- Application Number
- CN202420143901.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-19
AI Technical Summary
The built-in sensor of the existing oven has a short life, poor accuracy and high cost. The external exhaust device has a complex structure and delays and errors in detection.
Design a cooking state detection device, including a light source module, a receiving module and a detection module, the light source module and a receiving module are arranged outside the cavity, and reflecting surfaces on both sides form multiple reflection circuits. The incident light is formed after being reflected by the reflection surface several times. The detection module outputs gas concentration information based on the light intensity information, and combines the temperature acquisition module to obtain the cooking state.
It realizes cooking state detection with simple structure, high detection accuracy and low cost, avoids the short life and complex structure problems in traditional methods, and provides real-time and accurate gas concentration information.
Smart Images
Figure CN222171956U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of smart home appliances, and in particular to a cooking state detection device and a cooking apparatus. Background Art
[0002] As people's living standards continue to improve, using cooking devices, such as ovens to bake food has become more and more common in people's daily lives. In the process of using an oven to steam and bake food, the food will produce volatile gases.
[0003] At present, most ovens are equipped with sensors to detect volatile gases, so as to quickly know the status of food in the oven. However, due to the high internal temperature of the oven during operation, the built-in sensors have a short life and poor accuracy. The sensors need to be resistant to high temperatures, which is costly.
[0004] There is also an oven that uses an external exhaust device, in which the sensor is arranged in the exhaust device outside the oven, but this oven has a complex structure and there are delays and errors in gas detection. Utility Model Content
[0005] The technical problem to be solved by the present disclosure is to overcome the defects in the prior art such as short life, poor accuracy and high cost of ovens with built-in sensors, and complex structure, delay and error in gas detection of ovens with external exhaust devices, and to provide a cooking status detection device and a cooking device.
[0006] The present invention solves the above technical problems through the following technical solutions:
[0007] The present disclosure provides a cooking state detection device, which is applied in a cooking device, and comprises a light source module, a receiving module and a detection module, wherein the light source module and the receiving module are arranged outside the cavity of the cooking device;
[0008] A plurality of reflecting surfaces are respectively disposed on two opposite sides of the cavity, and the reflecting surfaces on the two sides form a plurality of reflecting loops;
[0009] The light source module is used to generate incident light; wherein the incident light enters the cavity through the incident port on the cavity, and forms an outgoing light after multiple reflections on the plurality of reflecting surfaces of the cavity; the outgoing light is emitted through the outgoing port on the cavity and reaches the receiving module;
[0010] The receiving module is used to output the emitted light to the detection module;
[0011] The detection module is used to detect the light intensity information of the emitted light, and output the gas concentration information of the gas in the cavity based on the light intensity information, so as to output the actual cooking state of the cooking device.
[0012] Preferably, the distance between the plurality of reflecting surfaces on each side of the cavity and the center position of the side surfaces where the plurality of reflecting surfaces are located is less than a set threshold.
[0013] Preferably, the cavity is provided with a first reflecting surface and a second reflecting surface;
[0014] The first reflecting surface is disposed on a first side of the cavity, and the second reflecting surface is disposed on a second side of the cavity, wherein the first side and the second side are two opposite sides of the cavity;
[0015] The incident light is reflected by the first reflecting surface and the second reflecting surface in sequence inside the cavity to form the outgoing light.
[0016] Preferably, the first reflecting surface is disposed at a center position of the first side, and the second reflecting surface is disposed at a center position of the second side.
[0017] Preferably, the cavity is provided with a third reflecting surface and at least two fourth reflecting surfaces;
[0018] The third reflection surface is disposed on a third side of the cavity, and the fourth reflection surface is disposed on a fourth side of the cavity, and the third side and the fourth side are two opposite sides of the cavity;
[0019] The incident light is alternately reflected by the fourth reflection surface and the third reflection surface in sequence inside the cavity to form the outgoing light.
[0020] Preferably, the third reflection surface is arranged at a central position of the third side, and at least two fourth reflection surfaces are symmetrically arranged at a central position of the fourth side.
[0021] Preferably, the light source module comprises a light emitting unit and a first light focusing unit;
[0022] The light emitting unit is used to generate the incident light;
[0023] The first focusing unit is used to focus the incident light so that the focused incident light is incident into the cavity.
[0024] Preferably, the receiving module includes a second light focusing unit;
[0025] The second light focusing unit is used to focus the outgoing light so that the focused outgoing light is output to the detection module.
[0026] Preferably, the cooking status detection device further includes a temperature acquisition module;
[0027] The temperature acquisition module is used to detect the gas temperature of the gas in the cavity and output the gas temperature to the detection module;
[0028] The detection module is also used to output the gas concentration information based on the light intensity information and the gas temperature.
[0029] The present disclosure also provides a cooking device, the cooking device comprising a control module and the cooking state detection device as described above;
[0030] The control module is used to receive the gas concentration information output by the cooking state detection device, output the actual cooking state of the cooking device based on the gas concentration information, and drive the cooking device.
[0031] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.
[0032] The positive and progressive effects of this disclosure are:
[0033] The present invention provides a plurality of reflective surfaces on two opposite sides of a cavity, and the reflective surfaces on the two sides form a plurality of reflective loops. The light source module generates incident light that is incident on the cavity of the cooking device, and the incident light is reflected multiple times by the reflective surfaces of the cavity to form outgoing light that is emitted to the receiving module. The detection module detects the light intensity information of the outgoing light received by the receiving module, and outputs the gas concentration information in the cavity according to the light intensity information, so as to output the actual cooking status of the cooking device. The invention has the advantages of simple structure, high cooking status detection accuracy, low detection cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 This is a module diagram of the cooking status detection device of Example 1 of the present disclosure.
[0035] Figure 2 This is a schematic diagram of the first working principle of the cooking status detection device of Example 2 of the present disclosure.
[0036] Figure 3 This is a schematic diagram of the second working principle of the cooking status detection device of Example 2 of the present disclosure.
[0037] Figure 4 This is a module diagram of the cooking status detection device of embodiment 2 of the present disclosure.
[0038] Figure 5 This is a module schematic diagram of the cooking device of Example 3 of the present disclosure. DETAILED DESCRIPTION
[0039] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.
[0040] Example 1
[0041] This embodiment provides a cooking status detection device, which is applied in a cooking apparatus.
[0042] like Figure 1 As shown, the cooking state detection device comprises a light source module 1, a receiving module 2 and a detection module 3, and the light source module 1 and the receiving module 2 are arranged outside the cavity of the cooking device;
[0043] A plurality of reflecting surfaces are respectively disposed on two opposite sides of the cavity, and the plurality of reflecting surfaces on the two sides form a plurality of reflecting loops;
[0044] The light source module 1 is used to generate incident light; wherein the incident light enters the cavity through the incident port on the cavity, and forms an outgoing light after multiple reflections on several reflecting surfaces of the cavity; the outgoing light is emitted through the outgoing port on the cavity and reaches the receiving module 2;
[0045] The receiving module 2 is used to output the outgoing light to the detection module 3;
[0046] The detection module 3 is used to detect the light intensity information of the emitted light, and output the gas concentration information of the gas in the cavity based on the light intensity information, so as to output the actual cooking state of the cooking device.
[0047] Specifically, the detection module includes a detector or an optical sensor. The detection module is not arranged inside the cavity of the cooking device. The ambient temperature of the detection module is much lower than the temperature inside the cooking device. The detection module does not need to be exposed to oil, smoke, and water vapor, etc., which can effectively extend the service life of the detection module and reduce costs. The light intensity received by the detection module changes with the composition and concentration of the gas in the cooking device, that is, the characteristic absorption of the gas. By detecting the light absorption of a specific gas, the actual cooking state of the cooking device can be inferred.
[0048] By arranging a plurality of reflective surfaces on opposite sides of the cavity, and the plurality of reflective surfaces on both sides form a plurality of reflective loops, a vacuum device is not required, the detection result responds quickly and in real time, and the optical path of the incident light generated by the light source module after it enters the cavity of the cooking device is increased, thereby improving the detection accuracy. When the gas concentration of the gas in the cavity is low, the signal in the detection process is small, and the signal is enhanced by increasing the optical path, thereby improving the detection accuracy. The optical path is the path length of the light in the gas in the cavity.
[0049] In this embodiment, by respectively arranging a plurality of reflective surfaces on two opposite sides of the cavity, and the plurality of reflective surfaces on both sides form a plurality of reflective loops, the light source module generates incident light that is incident on the cavity of the cooking device, which is reflected multiple times by the plurality of reflective surfaces of the cavity to form outgoing light that is emitted to the receiving module. The detection module detects the light intensity information of the outgoing light received by the receiving module, and outputs the gas concentration information in the cavity according to the light intensity information, so as to output the actual cooking status of the cooking device. The invention has the advantages of simple structure, high detection accuracy of the cooking status, and low detection cost.
[0050] Example 2
[0051] This embodiment provides a cooking status detection device, which is a further improvement on Embodiment 1.
[0052] In an implementable solution, the distance between the plurality of reflective surfaces on each side of the cavity and the center position of the side surface where the plurality of reflective surfaces are located is less than a set threshold.
[0053] In this scheme, by setting the distance between the center position of the side surfaces where the multiple reflecting surfaces are located on each side of the cavity to be less than a set threshold, the incident light is transmitted in the middle area of the cavity, and the light intensity information of the generated outgoing light can better characterize the gas concentration information of the gas in the cavity, thereby improving the accuracy and reliability of the gas concentration information.
[0054] In an implementable solution, the cavity is provided with a first reflecting surface and a second reflecting surface;
[0055] The first reflecting surface is disposed on a first side of the cavity, and the second reflecting surface is disposed on a second side of the cavity, wherein the first side and the second side are opposite sides of the cavity;
[0056] The incident light is reflected by the first reflection surface and the second reflection surface in sequence inside the cavity to form an outgoing light.
[0057] Specifically, Figure 2 This is a schematic diagram of the working principle of the cooking status detection device of this solution. Figure 2 The incident port is the first light-transmitting window A1, and the exit port is the second light-transmitting window A2. The second light-transmitting window A2 is arranged on the first side B1, and the first light-transmitting window A1 is arranged on the second side B2. The first light-transmitting window A1 and the second light-transmitting window A2 can be lenses. The incident light L1 enters the cavity through the first light-transmitting window A1, and is reflected by the first reflection surface C1 and the second reflection surface C2 in the cavity in sequence to form an exit light L2, and the exit light L2 is emitted through the second light-transmitting window A2.
[0058] In addition, a plurality of first and second reflection surfaces may be provided, and the incident light enters the cavity through the first light-transmitting window, and is reflected by the first reflection surface, the second reflection surface, the first reflection surface, the second reflection surface, etc. in the cavity to form an outgoing light, and the outgoing light is emitted through the second light-transmitting window. The number of the first and second reflection surfaces may be adjusted or set according to actual needs.
[0059] In this solution, by arranging the first reflecting surface and the second reflecting surface on different sides of the cavity, the incident light is reflected by the first reflecting surface and the second reflecting surface in sequence inside the cavity to form an outgoing light, thereby increasing the optical path of the incident light and improving the accuracy and reliability of the gas concentration information.
[0060] In an implementable solution, the first reflective surface is disposed at a center position of the first side, and the second reflective surface is disposed at a center position of the second side.
[0061] In this solution, by setting the first reflecting surface at the center position of the first side and the second reflecting surface at the center position of the second side, the incident light is transmitted in the middle position of the cavity, and the light intensity information of the generated outgoing light can better characterize the gas concentration information of the gas in the cavity, thereby improving the accuracy and reliability of the gas concentration information.
[0062] In another feasible solution, the cavity is provided with a third reflecting surface and at least two fourth reflecting surfaces;
[0063] The third reflection surface is arranged on the third side of the cavity, and the fourth reflection surface is arranged on the fourth side of the cavity, and the third side and the fourth side are two opposite sides of the cavity;
[0064] The incident light is reflected alternately by the fourth reflection surface and the third reflection surface in the cavity to form an outgoing light.
[0065] Specifically, Figure 3 This is a schematic diagram of the working principle of the cooking status detection device of this solution. Figure 3 The incident port is the third light-transmitting window A3, the exit port is the fourth light-transmitting window A4, the third reflection surface C3, the third light-transmitting window A3 and the fourth light-transmitting window A4 are arranged on the third side B3, and the fourth reflection surface C4 is arranged on the fourth side B4. The third light-transmitting window A3 and the fourth light-transmitting window A4 can be lenses. The incident light L1 enters the cavity through the third light-transmitting window A3, and is reflected by the fourth reflection surface C4, the third reflection surface C3 and the fourth reflection surface C4 in the cavity in sequence to form an exit light, and the exit light L2 is emitted through the fourth light-transmitting window A4.
[0066] In this solution, by providing a third reflection surface and at least two fourth reflection surfaces on different sides of the cavity, the incident light is reflected by the fourth reflection surface, the third reflection surface, and the fourth reflection surface in sequence inside the cavity to form an outgoing light, thereby increasing the optical path of the incident light and improving the accuracy and reliability of the gas concentration information.
[0067] In an implementable solution, the third reflection surface is disposed at the center of the third side, and at least two fourth reflection surfaces are symmetrically disposed at the center of the fourth side.
[0068] Specifically, the plurality of fourth reflection surfaces may be contacted in sequence and symmetrically arranged at the center position of the fourth side of the cavity.
[0069] In this solution, by arranging the third reflection surface at the center position of the third side and at least two fourth reflection surfaces symmetrically arranged at the center position of the fourth side, the incident light is transmitted in the middle position of the cavity, and the light intensity information of the generated outgoing light can better characterize the gas concentration information of the gas in the cavity, thereby improving the accuracy and reliability of the gas concentration information.
[0070] In one feasible solution, Figure 4 As shown, the light source module 1 includes a light emitting unit 11 and a first light focusing unit 12;
[0071] The light emitting unit 11 is used to generate incident light;
[0072] The first focusing unit 12 is used to focus the incident light so that the focused incident light is incident into the cavity.
[0073] Specifically, when the cavity is provided with a first reflection surface and a second reflection surface, the first focusing unit 12 is provided between the light emitting unit 11 and the second side of the cavity; when the cavity is provided with a third reflection surface and at least two fourth reflection surfaces, the first focusing unit 12 is provided between the light emitting unit and the third side. The incident light may be infrared light, and the first focusing unit 12 may be a collimating focusing lens.
[0074] In this solution, a first focusing unit is used to converge the incident light and then incident on the cavity, thereby ensuring the integration of the incident light and the reliability and practicability of the gas concentration detection in the cavity.
[0075] In an practicable solution, the receiving module 2 includes a second light focusing unit;
[0076] The second focusing unit is used to focus the outgoing light so that the focused outgoing light is output to the detection module 3 .
[0077] Specifically, when the cavity is provided with a first reflection surface and a second reflection surface, the second light focusing unit is provided between the detection module and the first side; when the cavity is provided with a third reflection surface and at least two fourth reflection surfaces, the second light focusing unit is provided between the detection module and the third side. The second light focusing unit may be a receiving lens.
[0078] In this solution, a second focusing unit is used to converge the outgoing light outside the cavity and then emit it to the detection module, thereby ensuring the integration of the outgoing light and ensuring the reliability and practicality of the gas concentration detection in the cavity.
[0079] In an implementable solution, the cooking state detection device further includes a temperature acquisition module 4;
[0080] The temperature acquisition module 4 is used to detect the gas temperature of the gas in the cavity and output the gas temperature to the detection module 3;
[0081] The detection module 3 is also used to output gas concentration information based on the light intensity information and the gas temperature.
[0082] Specifically, based on some historical light intensity information, some historical gas temperatures and some historical gas concentration information, several groups of data corresponding to the historical light intensity information, historical gas temperature and historical gas concentration information are constructed to form a corresponding mapping relationship table; the corresponding gas concentration information is obtained from the mapping relationship table according to the currently measured light intensity information and gas temperature.
[0083] For example, in the historical measurement process, when the light intensity information is R and the gas temperature is room temperature (25°C), the gas concentration information is S, and when the light intensity information is R and the gas temperature is 100°C, the gas concentration information is T. A mapping relationship table is constructed based on data like this. During actual measurement, if the light intensity information is detected to be R and the gas temperature is 100°C, the gas concentration information can be obtained as T according to the mapping relationship table. The more data obtained in the historical measurement process, the more accurate the gas concentration information obtained in the end.
[0084] In this solution, a temperature acquisition module is set up to detect the temperature of the gas in the cavity, and the gas concentration information is calculated by combining the light intensity information and the gas temperature, thereby ensuring the accuracy and reliability of the gas concentration information.
[0085] The working principle of the cooking state detection device of this embodiment is explained below with reference to specific examples:
[0086] After receiving the instruction to output the actual cooking status from the cooking device, Figure 3As shown, the light source module of the cooking status detection device outside the cooking device generates incident light, which is converged by the first focusing unit and incident into the cooking device cavity through the third light-transmitting window on the third side of the cooking device cavity. The incident light is reflected by the fourth reflection surface, the third reflection surface, and the fourth reflection surface in the cavity in sequence to form an outgoing light, which is emitted through the fourth light-transmitting window and collected by the receiving module to the detection module.
[0087] The degree of light absorption by a gas in its absorption band follows the Beer-Lambert law.
[0088]
[0089] Among them, I represents the light intensity of the outgoing light, I0 represents the light intensity of the incident light, K represents the absorption coefficient, b represents the optical path, and C represents the gas concentration.
[0090] When the intensity of the incident light is fixed, the outgoing light intensity can represent the gas concentration along the light path.
[0091] Food produces various specific gases during the cooking process. For example, amino acids and sugars will form imidazole, pyrroline, pyrrole, pyrazine, oxazolidinone, thiophene and other aroma substances during the Maillard reaction. The carbon-hydrogen bonds and nitrogen-hydrogen bonds in these gases have characteristic spectral absorption in the mid-infrared band. Optical sensors with corresponding wavelengths can detect the concentration of the corresponding gases in real time to determine the actual cooking status.
[0092] After receiving the outgoing light, the detection module detects the corresponding light intensity information, and links the temperature acquisition module to perform temperature compensation. The light intensity information is combined with information such as gas temperature to calculate the gas concentration information in the cavity, and the cooking node is determined based on the gas concentration curve.
[0093] In this embodiment, by respectively arranging a plurality of reflective surfaces on two opposite sides of the cavity, and the plurality of reflective surfaces on both sides form a plurality of reflective loops, the light source module generates incident light that is incident on the cavity of the cooking device, which is reflected multiple times by the plurality of reflective surfaces of the cavity to form outgoing light that is emitted to the receiving module. The detection module detects the light intensity information of the outgoing light received by the receiving module, and outputs the gas concentration information in the cavity according to the light intensity information, so as to output the actual cooking status of the cooking device. The invention has the advantages of simple structure, high detection accuracy of the cooking status, and low detection cost.
[0094] Example 3
[0095] This embodiment provides a cooking device, such as Figure 5 As shown, the cooking device includes a control module 5 and a cooking state detection device 6 as described in Example 1 or Example 2;
[0096] The control module 5 is used to receive the gas concentration information output by the cooking state detection device 6, output the actual cooking state of the cooking device based on the gas concentration information, and drive the cooking device.
[0097] In this embodiment, the control module receives the gas concentration information output by the cooking status detection device, and outputs the actual cooking status of the cooking device based on the gas concentration information, thereby driving the cooking device and improving the product performance of the cooking device.
[0098] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.
Claims
1. A cooking status detection device, characterized in that: The cooking state detection device is applied in a cooking device, and comprises a light source module, a receiving module and a detection module, wherein the light source module and the receiving module are arranged outside the cavity of the cooking device; A plurality of reflecting surfaces are respectively disposed on two opposite sides of the cavity, and the reflecting surfaces on the two sides form a plurality of reflecting loops; The light source module is used to generate incident light; wherein the incident light enters the cavity through the incident port on the cavity, and forms an outgoing light after multiple reflections on the plurality of reflecting surfaces of the cavity; the outgoing light is emitted through the outgoing port on the cavity and reaches the receiving module; The receiving module is used to output the emitted light to the detection module; The detection module is used to detect the light intensity information of the emitted light, and output the gas concentration information of the gas in the cavity based on the light intensity information, so as to output the actual cooking state of the cooking device.
2. The cooking status detection device according to claim 1, characterized in that: The distance between the plurality of reflecting surfaces on each side of the cavity and the center position of the side surfaces where the plurality of reflecting surfaces are located is less than a set threshold.
3. The cooking status detection device according to claim 1, characterized in that: The cavity is provided with a first reflecting surface and a second reflecting surface; The first reflecting surface is disposed on a first side of the cavity, and the second reflecting surface is disposed on a second side of the cavity, wherein the first side and the second side are two opposite sides of the cavity; The incident light is reflected by the first reflecting surface and the second reflecting surface in sequence inside the cavity to form the outgoing light.
4. The cooking state detection device according to claim 3, characterized in that: The first reflecting surface is disposed at a center position of the first side, and the second reflecting surface is disposed at a center position of the second side.
5. The cooking status detection device according to claim 1, characterized in that: The cavity is provided with a third reflecting surface and at least two fourth reflecting surfaces; The third reflection surface is disposed on a third side of the cavity, and the fourth reflection surface is disposed on a fourth side of the cavity, and the third side and the fourth side are two opposite sides of the cavity; The incident light passes through the fourth reflection surface and the third reflection surface in the cavity in sequence and then is alternately reflected to form the outgoing light.
6. The cooking status detection device according to claim 5, characterized in that: The third reflection surface is arranged at the center position of the third side, and at least two fourth reflection surfaces are symmetrically arranged at the center position of the fourth side.
7. The cooking status detection device according to any one of claims 1 to 6, characterized in that: The light source module comprises a light emitting unit and a first light focusing unit; The light emitting unit is used to generate the incident light; The first focusing unit is used to focus the incident light so that the focused incident light is incident into the cavity.
8. The cooking status detection device according to any one of claims 1 to 6, characterized in that: The receiving module includes a second light focusing unit; The second light focusing unit is used to focus the outgoing light so that the focused outgoing light is output to the detection module.
9. The cooking status detection device according to any one of claims 1 to 6, characterized in that: The cooking state detection device also includes a temperature acquisition module; The temperature acquisition module is used to detect the gas temperature of the gas in the cavity and output the gas temperature to the detection module; The detection module is also used to output the gas concentration information based on the light intensity information and the gas temperature.
10. A cooking device, characterized in that: The cooking device comprises a control module and a cooking state detection device as claimed in any one of claims 1 to 9; The control module is used to receive the gas concentration information output by the cooking state detection device, output the actual cooking state of the cooking device based on the gas concentration information, and drive the cooking device.