Induction cooking utensil

Abstract

The utility model relates to the technical field of cooking utensils, and discloses an induction cooking utensil which comprises a cooking main body, an infrared temperature measurement module and a shading body with a light channel, and the cooking main body is provided with a glass panel used for placing cookware and a heating wire coil arranged below the glass panel; the infrared temperature measurement module comprises an indium gallium arsenic infrared detection head and a circuit board, the indium gallium arsenic infrared detection head is installed on the circuit board and electrically connected with the circuit board, and the circuit board and the heating wire coil are both electrically connected with the control assembly. The shading body on the heating wire coil and the coil panel are integrally formed; according to the utility model, the shading body is arranged on the heating wire coil, so that the influence of external ambient light on the detector is reduced; and an airflow channel is reserved between the infrared temperature measurement module and the shading body of the heating wire coil, so that airflow can pass through the airflow channel, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking appliances, and particularly to an induction cooking appliance. Background Art

[0002] Patent CN221099897U induction cooking appliance discloses an induction cooking appliance, including a cooking main body, an infrared temperature measurement module and a light-shielding body with a light channel.

[0003] This technical solution can better solve the influence of ambient light on the detector. The function of the light-shielding body in this technical solution is to block light and prevent foreign objects such as cockroaches.

[0004] However, in this solution, a sealed cavity is formed between the light-shielding body, the panel and the infrared temperature measurement module, and the heat dissipation is not good. In some cases, the temperature in this cavity will be relatively high, which will affect the service life of the detector of the infrared temperature measurement module. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] To solve the above problems existing in the prior art, the utility model provides an induction cooking appliance, which has the advantages of being able to reduce the influence of external ambient light on the detector and having good heat dissipation effect.

[0007] (II) Technical Solutions

[0008] To achieve the purpose of being able to reduce the influence of external ambient light on the detector and having good heat dissipation effect, the utility model provides the following technical solution: an induction cooking appliance, including:

[0009] A cooking main body, having a glass panel for placing a cooking pot and a heating wire coil disposed below the glass panel;

[0010] An infrared temperature measurement module, including an indium gallium arsenide infrared detector head and a circuit board, the indium gallium arsenide infrared detector head is installed on the circuit board and electrically connected thereto; and,

[0011] A light-shielding body with a light channel, the light-shielding body on the heating wire coil is integrally formed with the coil disk.

[0012] Preferably, an air flow channel is provided between the infrared temperature measurement module and the light-shielding body.

[0013] Preferably, both the infrared temperature measurement module and the heating wire coil are disposed inside the cooking main body.

[0014] Preferably, the lower end of the light channel is located at the opening, and an air flow channel is provided between the light channel and the infrared temperature measurement module.

[0015] Preferably, the light shielding body includes an upper opening for receiving the infrared rays of the cookware and a lower opening for accommodating the infrared temperature measurement module.

[0016] Preferably, the indium gallium arsenide infrared detector includes a photosensitive unit and a light filter covering the photosensitive unit, and is used to receive the infrared rays emitted by the cookware above the cooking heating area of the electromagnetic stove glass panel, and then generate and output an electrical signal.

[0017] Preferably, the light filter filters the light with a wavelength ≤ 0.94 μm.

[0018] Compared with the prior art, the present utility model provides an induction cooking appliance, which has the following beneficial effects:

[0019] In this induction cooking appliance, by arranging a light shielding body on the heating wire coil to cover or partially cover the infrared temperature measurement module, the influence of external ambient light on the detector is reduced; the contact area between the infrared temperature measurement module and the heating wire coil is small or there is no contact, and there is an air flow channel between the infrared temperature measurement module and the light shielding body of the heating wire coil for air to flow through, improving the heat dissipation effect. Description of the Drawings

[0020] Figure 1 is a cross-sectional view of an embodiment of the induction cooking appliance provided by the present utility model;

[0021] Figure 2 is a cross-sectional view of an embodiment of the induction cooking appliance provided by the present utility model;

[0022] Figure 3 is a cross-sectional view of an embodiment of the induction cooking appliance provided by the present utility model;

[0023] Figure 4 is an exploded view of the infrared temperature measurement module and the heating wire coil of the present utility model;

[0024] Figure 5 is a schematic installation view of the infrared temperature measurement module and the heating wire coil of the present utility model;

[0025] Figure 6 is the A-A cross-sectional view of the present utility model Figure 5 in the middle.

[0026] In the figure: 100, induction cooking appliance; 1, electromagnetic stove glass panel; 2, cooking main body; 3, infrared temperature measurement module; 31, light filter; 32, housing; 33, fastening screw; 4, air flow channel; 5, heating wire coil; 51, light shielding body; 52, lower opening; 53, upper opening; 6, control component; 7, infrared light; 8, environmental interference light; 81, cooling air; 9, cookware. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1-6 shown, an induction cooking appliance includes:

[0029] A cooking main body 2 having a glass panel 1 for placing a cookware 9 and a heating wire coil 5 disposed below the glass panel 1;

[0030] An infrared temperature measurement module 3 including an indium gallium arsenide infrared detection head and a circuit board, the indium gallium arsenide infrared detection head being mounted on the circuit board and electrically connected thereto; and,

[0031] A light-shielding body 51 having a light channel, the light-shielding body 51 on the heating wire coil 5 being integrally formed with the coil disk;

[0032] Specifically, the cooking main body 2 includes the entire cooking appliance housing, the upper surface of which has a glass panel 1 for placing a cookware 9, and the interior thereof has a heating wire coil 5 located below the glass panel 1 for inductively heating the cookware 9; the infrared temperature measurement module 3 includes an indium gallium arsenide infrared detection head and a circuit board, the indium gallium arsenide infrared detection head being mounted on the circuit board and electrically connected thereto, and the infrared light 7 emitted by the cookware 9 is received by a photodiode in the detection head and converted into an electrical signal to the circuit board, and the temperature is obtained after signal processing; the light-shielding body 51 has a fixing portion connecting the heating wire coil 5, and the light-shielding body 51 is mounted in the cooking main body 2 through the fixing portion, and the connection manner of the fixing portion can be screw connection, snap connection, bonding, etc. It should be noted that most of the glass panels 1 on the market are microcrystalline panels and borosilicate glass, which have the characteristic of high temperature resistance. In addition, there is a control component 6 electrically connected to the circuit board and the heating wire coil 5 in the cooking main body 2 to adjust the heating power.

[0033] Further, in an embodiment of the present utility model, an air flow channel is provided between the infrared temperature measurement module 3 and the light-shielding body 51; a light-shielding body 51 is provided on the coil disk. The light-shielding body 51 completely covers or partially covers the infrared temperature measurement module 3, and there is an air flow channel 4 between the light-shielding body 51 and the infrared temperature measurement module 3.

[0034] Among them, the light-shielding body 51 can be made of light-impermeable material, so that the light-shielding body 51 can block most of the external interference light from irradiating the detector and superimposing on the infrared rays of the temperature of the useful cookware 9, reducing interference. Due to the existence of the air flow channel 4 between the light-shielding body 51 and the infrared temperature measurement module 3, on the one hand, the existence of the air flow channel 4 avoids the heat on the coil disk during high temperature from being conducted to the infrared temperature measurement module 3 by conduction; on the other hand, the wind blown by the fan can flow through the air flow channel 4, playing a role in heat dissipation.

[0035] Further, in an embodiment of the present invention, both the infrared temperature measurement module 3 and the light-shielding body are arranged inside the cooking main body 2.

[0036] Further, in an embodiment of the present invention, the lower end of the light channel is located at the opening, and there is an air flow channel 4 between it and the infrared temperature measurement module 3. Due to the existence of the air flow channel 4 between the light-shielding body 51 and the infrared temperature measurement module 3, on the one hand, the existence of the air flow channel 4 avoids the heat on the coil disk during high temperature from being conducted to the infrared temperature measurement module 3 by conduction; on the other hand, the wind blown by the fan can flow through the air flow channel 4, playing a role in heat dissipation.

[0037] Further, in an embodiment of the present invention, the light-shielding body 51 includes an upper opening for receiving the infrared rays of the cookware and a lower opening for accommodating the infrared temperature measurement module.

[0038] Further, in an embodiment of the present invention, the indium gallium arsenide infrared detector includes a photosensitive unit and a filter body 31 covering the photosensitive unit, and is used for receiving the infrared rays emitted by the cookware 9 above the cooking heating area of the electromagnetic oven glass panel 1, and then generating and outputting an electrical signal.

[0039] Further, in an embodiment of the present invention, the filter body 31 filters the light with a wavelength ≤ 0.94μm; the photodiode of the indium gallium arsenide infrared detection head has a filter body 31, and the filter body 31 filters the light with a wavelength ≤ 0.94μm, greatly reducing the interference of sunlight, halogen lamps, energy-saving lamps, LED lamps and other lights in the ambient light.

[0040] The lowest wavelength that the indium gallium arsenide infrared detection head can detect is about 0.7μm. For the temperature measurement of the induction cooking appliance 100, the infrared rays radiated by the temperature within 400°C are mainly in the wavelength band above 1.2μm of the detector. Theoretically, it is best to filter out the infrared rays and visible light within 1.2μm, so as to reduce the interference of external interference light as much as possible. However, it is technically difficult or costly to filter out all the infrared rays and visible light within 1.2μm that may generate interference light to the detection head.

[0041] It should be understood that, compared with the indium gallium arsenide detector, the light radiated by the LED lamp causes the greatest interference to the indium gallium arsenide detector in the range of 0.7 μm to 0.94 μm. Filtering out the light in this wavelength band can minimize the impact of the LED lamp. During the production of the indium gallium arsenide detector, adding a light-filtering material to the material covering the photosensitive surface of the photodiode can increase the lowest wavelength band that the detection head can sense and reduce the influence of interfering light on the detector.

[0042] For example, filtering out the light within 0.94 μm (this value is not a fixed value and can also be within 0.78 μm, within 0.85 μm, within 0.94 μm, etc.) can filter out most of the interference from the LED lamp and also filter out part of the interference from the incandescent lamp. This is the most mature solution with the lowest cost. Moreover, with the popularization of LED lamps, the proportion of LED lamps in household kitchens is increasing. Filtering out the light within 0.94 μm greatly reduces the proportion of interfering light and is a solution with the highest cost performance and good results.

[0043] Working principle: During normal cooking, the cookware 9 should be placed on the cooking heating area of the electromagnetic stove glass panel 1. There is a heating wire coil 5 below the cooking heating area. During the operation of the heating wire coil 5, the bottom area of the cookware 9 generates an induction heating phenomenon under the action of the alternating magnetic field, and then generates infrared light 7 of the temperature of the cookware 9. The infrared light 7 is emitted and propagated into the cooking appliance through the electromagnetic stove glass panel 1, and then is received by the infrared detector on the infrared temperature measurement module 3 arranged inside the cooking appliance; however, during cooking, part of the environmental interfering light 8 is transmitted and propagated into the cooking appliance through the relevant ventilation and light leakage structures of the electromagnetic stove glass panel 1 and the electromagnetic stove housing 32 assembly, and finally is received by the infrared temperature measurement module 3 to generate interference and cause temperature measurement errors; the environmental interfering light 8 includes but is not limited to interfering light sources containing a large amount of infrared bands such as sunlight and halogen lamps, and LED light sources containing a small amount of infrared bands; at the same time, during the process of the infrared temperature measurement module 3 receiving the temperature infrared light 7 transmitted by the electromagnetic stove glass panel 1, due to the linear propagation characteristic of light, in order to ensure that the infrared detector in the infrared temperature measurement module 3 receives better light intensity and there is no structure for the infrared detector to block light, therefore, in order to ensure that the infrared detector can receive the temperature infrared light 7 with better light intensity and can also block the abnormal influence of a large amount of environmental interfering light 8, the following embodiments are used to optimize the temperature measurement accuracy; the light-shielding body 51 on the heating wire coil 5 can block most of the interfering light from irradiating on the detector of the infrared temperature measurement module 3 and superimposing on the infrared rays of the cookware 9, thereby reducing interference; the air flow channel 4 between the heating wire coil 5 and the infrared temperature measurement module 3 can transmit the heat dissipation air 81 to reduce the temperature of the module and improve the service life; through the setting of the light-shielding component, most of the environmental interfering light 8 transmitted through the electromagnetic stove glass panel 1 and the heat dissipation ventilation structure can be blocked to generate interference.

[0044] In summary, for the induction cooking appliance 100, the photosensitive device of the infrared temperature measurement module 3 is a photoelectric infrared detector, such as an indium gallium arsenide infrared detector. Compared with a pyroelectric infrared detector, it has the characteristics of being able to measure temperature through glass, and having strong resistance to water, water vapor, soft tissues and other objects; a light shielding body 51 is provided on the heating wire coil 5 to reduce the interference of the temperature measurement accuracy of interfering light, and the structure is simple; the light shielding body 51 completely covers or partially covers the infrared temperature measurement module 3 to reduce interference; an air flow channel 4 is left between the light shielding body 51 and the infrared temperature measurement module 3 to reduce the direct conduction of the heat of the heating wire coil 5 to the infrared temperature measurement module 3 and improve the service life of the module; the air flow channel 4 can pass wind to improve the heat dissipation effect.

[0045] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An induction cooking appliance, characterized in that, Comprising: A cooking main body, having a glass panel for placing cookware and a heating wire coil disposed below the glass panel; An infrared temperature measurement module, including an indium gallium arsenide infrared detection head and a circuit board, the indium gallium arsenide infrared detection head being mounted on the circuit board and electrically connected thereto; And, A light-shielding body having a light channel, the light-shielding body on the heating wire coil being integrally formed with the coil disc.

2. An induction cooking appliance according to claim 1, characterized in that: An air flow channel is provided between the infrared temperature measurement module and the light-shielding body.

3. The induction cooking appliance according to claim 1, wherein: Both the infrared temperature measurement module and the heating wire coil are disposed inside the cooking main body.

4. An induction cooking appliance according to claim 1, characterized in that: An air flow channel is provided between the lower end of the heating wire coil and the infrared temperature measurement module.

5. An induction cooking appliance according to claim 1, characterized in that: The light-shielding body includes an upper opening for receiving infrared rays from the cookware and a lower opening for accommodating the infrared temperature measurement module.

6. The induction cooking appliance according to claim 1, characterized in that: The indium gallium arsenide infrared detection head includes a photosensitive unit and a filter body covering the photosensitive unit, and is used to receive infrared rays emitted by the cookware above the cooking heating area of the electromagnetic stove glass panel, and then generate and output an electrical signal.

7. An induction cooking appliance according to claim 6, characterized in that: The filter body filters light in the wavelength range of ≤0.94μm.

Images