CN220853882U

CN220853882U - Induction cooking appliance

Info

Publication number: CN220853882U
Application number: CN202322639236.7U
Authority: CN
Inventors: 管兴勇
Original assignee: Hangzhou Yue Magnetic Technology Co ltd
Current assignee: Hangzhou Yue Magnetic Technology Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2024-04-26
Anticipated expiration: 2033-09-27

Abstract

The utility model discloses an induction cooking utensil, which comprises a cooking main body, an infrared temperature measuring module and a shading body with a light channel, wherein the cooking main body is provided with a glass panel for placing a cooker and a heating wire coil arranged below the glass panel; the infrared temperature measurement module comprises a circuit board, an InGaAs infrared detection head and a light-emitting part which are respectively and electrically connected with the circuit board, wherein the light-emitting part is used for detecting whether the InGaAs infrared detection head and a signal processing circuit thereof have faults or not; one end of the optical channel is clung to the glass panel, the other end is covered above the InGaAs infrared detection head and the light-emitting part, and the light shielding body is provided with a fixing part connected with the heating wire coil. The shading body in the technical scheme reduces the entering of external interference light; when the light-emitting part emits light, the inner wall of the cavity of the optical channel can reflect, so that the intensity of light emitted by the light-emitting part irradiated on the photosensitive surface of the InGaAs infrared detection head is enhanced, and the accuracy of fault detection is further improved.

Description

Induction cooking appliance

Technical Field

The utility model relates to the technical field of cooking appliances, in particular to an induction cooking appliance with a self-checking function.

Background

The infrared temperature measurement technology using the thermopile detector cannot be applied to a scene where the glass panel is blocked because the infrared wavelength range which can be detected by the infrared temperature measurement technology is blocked by the glass panel. The infrared temperature measurement technology of the InGaAs photoelectric detector is applied, so that the infrared temperature measurement technology can detect partial infrared rays transmitted through a bearing panel (typically, glass ceramic panel and high borosilicate glass) of the induction cooking appliance, and convert optical signals (infrared rays) into electric signals, thereby realizing the measurement of the temperature of the cooker through the panel.

However, the infrared temperature measurement technology of indium gallium arsenide has the following problems: there is a minimum detectable temperature for the measurement of the target object, and the InGaAs photodiode is not signaled when the temperature of the target object (e.g., the pot) is below its minimum detectable temperature. If the InGaAs photodiode is damaged or has performance fading, or other devices of the infrared temperature measurement module are damaged, a signal cannot be output above the lowest temperature; when the temperature of the target pot is increased, the temperature cannot be controlled, and the carrying panel is damaged due to overhigh temperature of the pot, so that poor customer experience or potential safety hazard is caused.

Disclosure of utility model

The utility model mainly aims to provide an induction cooking appliance, and aims to solve the technical problem that whether a temperature measuring module of the existing induction cooking appliance fails or not can not be accurately known.

To achieve the above object, the present utility model provides an induction cooking appliance comprising:

A cooking body having a glass panel for placing a pot and a heating coil provided below the glass panel;

The infrared temperature measurement module comprises a circuit board, an InGaAs infrared detection head and a light-emitting part, wherein the InGaAs infrared detection head and the light-emitting part are respectively and electrically connected with the circuit board, and the light-emitting part is used for detecting whether the InGaAs infrared detection head and a signal processing circuit thereof have faults or not; and

The glass panel is closely attached to one end of the light channel, the other end of the light channel is covered above the InGaAs infrared detection head and the light-emitting part, and the light-shielding body is provided with a fixing part connected with the heating wire coil.

Optionally, the infrared temperature measurement module and the shading body are both arranged in the cooking main body.

Optionally, the upper end of the optical channel is clung to the glass panel, and the lower end of the optical channel is covered above the InGaAs infrared detection head and the light emitting part.

Optionally, the infrared temperature measurement module includes a housing at least covering part of the circuit board, the housing has an opening, and the photosurface of the InGaAs infrared detection head is accommodated in the housing and is disposed facing the opening.

Optionally, the light emitting part is accommodated in the housing and is located below the opening.

Optionally, the lower end of the light channel is located at the opening and closely connected to the housing.

Optionally, the light channel tapers from top to bottom.

Optionally, the fixing portion is a first protrusion extending along an axial direction from an outer edge of the light shielding body, and the heating wire coil is provided with a second protrusion clamped with the first protrusion.

Optionally, the first protrusion and the second protrusion are both annular protrusions.

Optionally, the material of the light shielding body is an opaque elastic material.

According to the technical scheme, one end of the light channel of the light shielding body is tightly attached to the glass panel, and the other end of the light channel is covered above the InGaAs infrared detection head and the light emitting part, so that the entering of external interference light is reduced; and when the light-emitting part emits light, the inner wall of the cavity of the optical channel can also realize the reflection effect, so that the intensity of the light emitted by the light-emitting part irradiated on the light-sensitive surface of the InGaAs infrared detection head is enhanced, and the accuracy of fault detection is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic cross-sectional view of an embodiment of an induction cooking appliance provided by the present utility model;

FIG. 2 is an enlarged view of a portion of the area of FIG. 1;

fig. 3 is a schematic cross-sectional view of another embodiment of an induction cooking appliance provided by the present utility model;

FIG. 4 is a cross-sectional view of the infrared thermometry module of FIG. 1.

In the figure: the induction cooking appliance comprises an induction cooking appliance body-100, a cooking main body-1, a glass panel-11, a heating wire coil-12, a second protrusion-121, a control component-13, an infrared temperature measuring module-2, a circuit board-21, an indium gallium arsenic infrared detection head-22, an indium gallium arsenic photodiode-221, a protective shell-222, a light emitting part-23, a shell-24, an opening-241, a light shielding body-3, a light channel-3 a, a columnar main body-31 and a first protrusion-311.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

For a better description and illustration of embodiments of the utility model, reference should be made to one or more of the accompanying drawings, but the additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the inventive, presently described embodiments or preferred modes of carrying out the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are positional relationships based on the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus referred to must have a specific orientation or operate in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the existing induction cooker, an InGaAs photodiode is damaged or performance of the existing induction cooker is faded, or other devices of an infrared temperature measurement module are damaged, so that a signal can not be output above the lowest temperature; when the temperature of the target pot is increased, the temperature cannot be controlled, and the carrying panel is damaged due to overhigh temperature of the pot, so that poor customer experience or potential safety hazard is caused.

In view of this, the present utility model provides an induction cooking apparatus, fig. 1-4 are schematic views of an induction cooking apparatus according to an embodiment of the present utility model, referring to fig. 1-4, the induction cooking apparatus 100 includes a cooking main body 1, an infrared temperature measurement module 2, and a light shielding body 3 having a light channel 3 a.

Specifically, the cooking body 1 comprises a whole cooking device shell, the upper surface of the cooking device shell is provided with a glass panel 11 used for placing cookware, and the inside of the cooking device shell is provided with a heating wire coil 12 positioned below the glass panel 11 and used for carrying out induction heating on the cookware; the infrared temperature measurement module 2 comprises a light emitting part 23, an indium gallium arsenic infrared detection head 22 and a circuit board 21, wherein the light emitting part 23 and the indium gallium arsenic infrared detection head 22 are arranged on the circuit board 21 and are electrically connected with the circuit board 21, and a photodiode 221 in the detection head 22 receives infrared light emitted by a pot, converts the infrared light into an electric signal to the circuit board 21, and obtains the temperature after signal processing; by controlling the light emitting part 23 to emit light and comparing the signal received by the circuit board 1 with a set threshold value, it is detected whether the infrared temperature measuring module 2 is malfunctioning. One end of the light channel 3a is tightly attached to the glass panel 11, the other end is covered above the InGaAs infrared detector 22 and the light emitting part 23, the light shielding body 3 has a fixing part connected with the heating wire coil 12, the light shielding body 3 is installed in the cooking main body 1 through the fixing part, and the connection mode of the fixing part can be clamping connection, bonding or the like.

The glass panel 11 in the market at present is mostly a microcrystalline panel or borosilicate glass, and has the characteristic of high temperature resistance; a control assembly 13 electrically connected with the circuit board 21 and the heating wire coil 12 is arranged in the cooking main body 1 so as to adjust heating power; the circuit board 21 has a signal amplifying circuit, a signal processing circuit, and the like. In addition, it should be understood that the on and off of the light emitting portion 23 may be controlled automatically by the circuit board 21, or may be controlled by other circuits than the circuit board 21 or otherwise, such as manually, etc.

In the technical scheme of the utility model, one end of the light channel 3a of the light shielding body 3 is tightly attached to the glass panel 11, and the other end is covered above the InGaAs infrared detection head 22 and the light emitting part 23, so that the entering of external interference light is reduced; when the light-emitting part 23 emits light, the inner wall of the cavity of the light channel 3a can also realize the reflection effect, so that the intensity of the light emitted by the light-emitting part 23 irradiated on the light-sensitive surface of the InGaAs infrared detection head 22 is enhanced, and the accuracy of fault detection is further improved. The light shielding body 3 prevents foreign matter such as insects and oil dirt from covering the probe 22 and attenuating the infrared signal.

To simplify the structure of the induction cooking apparatus, referring to fig. 1 to 3, in some embodiments of the present utility model, the infrared temperature measurement module 2 and the light shielding body 3 are both disposed inside the cooking body 1. The infrared temperature measuring module 2 is installed below the heating wire coil 12, and the middle of the heating wire coil 12 is hollow and is used for setting the shading body 3. Of course, the embodiment of the present utility model is not limited thereto, and in other embodiments, the heating coil 12 may be a hollow structure, the infrared temperature measuring module 2 is installed at a hollow place, not below the hollow place, and the light shielding body 3 may also be installed at a non-central area of the heating coil 12.

Further, in this embodiment, the optical channel 3a is disposed along the central axis of the light shielding body 3 in a penetrating manner, when the light shielding body 3 is disposed vertically, the upper port of the optical channel 3a (i.e. the upper end of the light shielding body 3) is tightly attached to the glass panel 11, and the lower port of the optical channel 3a (i.e. the lower end of the light shielding body 3) is covered above the ingaas infrared detection head 22 and the light emitting portion 23, where the "cover" may be a complete cover or a partial cover. By reducing gaps as much as possible, the entry of ambient interference light is prevented, and the shading effect is improved. Although the present invention is in a close contact state, a small amount of voids are inevitably present.

In order to better prevent ambient light from interfering with the ingaas infrared detection head 22, referring to fig. 2 and 4, in an embodiment of the present utility model, the infrared temperature measurement module 2 includes a housing 24 that at least covers a portion of the circuit board 21 (the housing 24 may also completely cover the circuit board 21), the housing 24 has an opening 241, and a light sensing surface of the ingaas infrared detection head 22 faces the opening 241, where the light sensing surface is in the housing 24, and can further block the entry of ambient light through the housing 24. In addition, it should be appreciated that the InGaAs infrared detector head 22 includes an InGaAs photodiode 221 and a peripheral protective housing 222 for filtering infrared light of a specific wavelength band, and that the protective housing 222 may be exposed from the opening 241. Similarly, the housing of the light emitting part 23 may be exposed from the opening 241.

Similarly, the light emitting portion 23 is also accommodated in the housing 24 and positioned below the opening 241. When the light emitting part 23 emits light, the inner wall of the cavity of the optical channel 3a can also play a role of reflection, so that the intensity of the light emitted by the light emitting part 23 irradiated on the light sensing surface of the InGaAs infrared detection head 22 is enhanced, and the accuracy of fault detection is further improved.

The material of the housing 24 is preferably a metal material with low magnetic permeability, such as aluminum, aluminum alloy, copper alloy, etc., for shielding signal interference caused by an alternating magnetic field generated by a wire coil of the infrared temperature measurement module 2 during the working process of the cooking utensil. The housing 24 may also be a plastic piece or removed if the infrared thermometry module 2 is relatively far from the heating coil and the coil disc generates a magnetic field with less penetration through the thermometry module 2.

The lower port of the light channel 3a can be abutted and tightly attached to the opening 241 by the housing 24, and can be tightly contacted with the housing 24, thereby reducing the leakage of the ambient light due to the gap.

Referring to fig. 1, in an embodiment of the utility model, the light channel 3a gradually becomes smaller from top to bottom, and the entire light channel 3a is in the shape of an inverted truncated cone, so that the infrared light emitted from the bottom of the pan can be received in a large area, and more infrared light can be received. Of course, the embodiment of the present utility model is not limited thereto, and referring to fig. 3, the light channel 3a may be formed in a column shape, such as a cylinder shape.

In order to facilitate the installation of the light shielding body 3, referring to fig. 2, in an embodiment of the present utility model, the light shielding body 3 has a cylindrical body 31, an opening at one end of the light channel 3a is located on an upper end surface of the cylindrical body 31, and an opening at the other end of the light channel 3a extends from a lower end surface of the cylindrical body 31 in an axial direction. The fixing portion is a first protrusion 311 extending along an axial direction from a lower end surface of the columnar body 31, and the heating coil 12 is provided with a second protrusion 121 engaged with the first protrusion 311.

Further, to make the installation firm, in one embodiment, the first protrusion 311 and the second protrusion 121 are both annular protrusions.

In order to avoid the light shielding body 3 transmitting light, in some embodiments of the present utility model, the material of the light shielding body 3 is an opaque elastic material. And, the elastic material makes the installation of the shading body 3 more stable.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An induction cooking appliance, comprising:

2. The induction cooking appliance of claim 1, wherein the infrared temperature measurement module and the light shield are both disposed inside the cooking body.

3. The induction cooking appliance of claim 1, wherein an upper end of said light tunnel is proximate to said glass panel and a lower end of said light tunnel is covered over said indium gallium arsenide infrared detector head and said light emitting portion.

4. An induction cooking appliance according to claim 3, wherein the infrared temperature measurement module comprises a housing at least partially enclosing the circuit board, the housing having an opening, the photosurface of the indium gallium arsenide infrared detection head being received within the housing and disposed facing the opening.

5. The induction cooking appliance of claim 4, wherein said light emitting portion is housed within said housing and is located below said opening.

6. The induction cooking appliance of claim 4, wherein a lower end of said light tunnel is located at said opening and is in close contact with said housing.

7. An induction cooking appliance according to claim 3, wherein said light path tapers from top to bottom.

8. The induction cooking appliance of claim 1, wherein the fixing portion is a first protrusion extending along an axial direction from an outer edge of the light shielding body, and the heating wire coil is provided with a second protrusion engaged with the first protrusion.

9. The induction cooking appliance of claim 8, wherein the first protrusion and the second protrusion are both annular protrusions.

10. The induction cooking appliance of claim 1, wherein the light shielding body is made of an opaque elastic material.