Drum-type cooking utensil with infrared temperature measurement function

Abstract

The utility model discloses a drum-type cooking utensil with an infrared temperature measurement function. The drum-type cooking utensil comprises a shell, a drum pot and an infrared temperature measurement module. The roller cookware is rotatably arranged on the shell, and an electromagnetic coil panel is arranged between the shell and the roller cookware and used for induction heating of the roller cookware; the infrared temperature measurement module comprises a circuit board and an indium gallium arsenic photodiode arranged on the circuit board, and the light sensing surface of the indium gallium arsenic photodiode faces the outer surface of the roller pot and is used for receiving infrared light emitted by the pot body so as to measure the temperature of the pot body. According to the technical scheme, the temperature of the roller pot is measured through the non-contact infrared temperature measurement module, the temperature of the induction heating part can be measured in real time, in this way, when the roller pot rotates, the temperature measurement unit does not need to rotate, the temperature measurement part is located in the electromagnetic heating coverage area all the time, and then accurate control over the temperature of the pot body in the magnetic field heating area can be achieved. In addition, the temperature measuring unit of the cooking utensil is simple in structure, does not need to be arranged in all directions and is convenient to maintain or replace.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking appliances, and particularly relates to a drum-type cooking appliance with an infrared temperature measurement function. Background Technique

[0002] The existing temperature measurement technologies for cooking appliances include contact temperature measurement and non-contact temperature measurement.

[0003] Typical representative products of contact temperature measurement technology include thermocouples, thermistors, platinum resistors, etc. The contact temperature measurement method can be set on the surface of the pot body, but the installation is relatively complex. Especially for drum-type cooking appliances, due to the rotation of the drum, the connecting wire of the temperature measurement unit also rotates accordingly. Therefore, a coupling device needs to be set to lead out the temperature measurement signal to the control unit. However, the coupling device has a complex structure, low reliability and high cost. Especially in the occasion with heavy kitchen fumes, it is easy to malfunction. Moreover, the contact temperature measurement unit only measures the local temperature of a very small area of the installation position, and is greatly affected by the installation structure. Since the temperature measurement position of the contact temperature measurement is fixed, when the pot rotates, the temperature measurement unit also rotates, and the position of the temperature measurement unit may not be in the electromagnetic heating zone coverage area. Therefore, it is very difficult to accurately control the heating temperature of the pot in the magnetic field heating area. If precise temperature control is to be carried out, a lot of temperature measurement points need to be arranged within the 360° range of the heating zone coverage area. On the one hand, the structure is very complex, on the other hand, the algorithm will be very complex, and when the pot needs to be repaired or replaced, there are disadvantages such as complex installation process, low repair efficiency and high labor cost.

[0004] Typical representative products of non-contact temperature measurement technology include thermopile detectors, etc., which can detect the temperature within a relatively large area. Since there is no need to contact the pot, it can be set on the machine shell or the coil support instead of on the pot body, and its position relative to the coil heating area does not change. When the pot rotates, the temperature of the pot on a plane within the absolute position range of the coil heating area can be accurately measured.

[0005] Thermopile detectors are currently widely used in many temperature measurement scenarios, such as handheld infrared thermometers, forehead thermometers, and some household appliances. However, thermopile detectors have their inherent defects: the shortest wavelength of infrared rays that thermopile detectors can sense is generally greater than 2.5μm, and they basically have no response to infrared rays with a wavelength less than 2.5μm.

[0006] Infrared rays with a wavelength ≥ 2.5μm have two inherent characteristics:

[0007] 1. It cannot penetrate glass (or the penetration ratio through glass is very small and can be ignored);

[0008] 2. Its ability to penetrate water, oil, water vapor, soy sauce, vinegar and some soft tissue objects is very weak.

[0009] Therefore, when a thermopile detector is applied in the kitchen field, it is easily affected by water, oil, water vapor, etc., resulting in signal attenuation, and thus causing inaccurate temperature measurement. In addition, for infrared rays with a wavelength ≥ 2.5 μm, the smoothness and color of the object surface have a relatively large impact on the emissivity. Therefore, for objects at the same temperature, when the smoothness and color of the surface vary greatly, the temperatures detected by the thermopile will vary significantly. When the cookware is new, its surface is relatively shiny and the emissivity is low, so the measured temperature is lower than the actual temperature. If calibrated with a new machine as the standard, then when using new cookware, temperature measurement and control are relatively ideal. However, after being heated and used for a period of time, the color of the cookware surface will darken and some dirt will adhere to it, the emissivity will increase, at the same position and the same temperature, the measured temperature will increase, resulting in a lower actual controlled temperature and causing the problem of insufficient wok qi.

[0010] Patent 202111370525.0 discloses a temperature control device and method. The solution adopted in this patent is a contact temperature measurement technology. When the cookware is rotating, to measure the temperature of the heating area at any time, multiple contact temperature measurement probes must be set. Utility Model Content

[0011] The main purpose of the present utility model is to propose a drum - type cooking appliance with an infrared temperature measurement function, aiming to solve the technical problems that the structure of the temperature measurement unit of the existing drum - type cooking appliance is relatively complex and the cost of maintenance or replacement is relatively high.

[0012] To achieve the above object, the drum - type cooking appliance with an infrared temperature measurement function proposed by the present utility model includes:

[0013] A housing;

[0014] A drum - type cookware rotatably arranged in the housing, an electromagnetic coil disk is arranged between the housing and the drum - type cookware for inductively heating the drum - type cookware; and,

[0015] An infrared temperature measurement module, including a circuit board and an indium gallium arsenide photodiode arranged on the circuit board. The photosensitive surface of the indium gallium arsenide photodiode faces the outer surface of the drum - type cookware for receiving the infrared light emitted by the cookware body to measure its temperature.

[0016] Optionally, at least part of the cookware body of the drum - type cookware is covered by the housing to form a light - sealed space.

[0017] Optionally, the material of the drum - type cookware is stainless steel or iron.

[0018] Optionally, it further includes a motor, and the rotating shaft of the motor is connected to the drum - type cookware to drive the cookware body to rotate self - rotatably.

[0019] Optionally, the motor also drives the drum cookware to rotate radially around the pot body.

[0020] Optionally, the infrared temperature measurement module is arranged between the housing and the drum cookware and is located below the electromagnetic coil disk.

[0021] Optionally, the electromagnetic coil disk is provided with at least one hollow structure for irradiating the infrared light emitted by the pot body onto the photosensitive surface of the indium gallium arsenide photodiode.

[0022] Optionally, both the electromagnetic coil disk and the infrared temperature measurement module are fixedly installed on the housing.

[0023] Optionally, the sensitive wavelength of the indium gallium arsenide photodiode is < 1800 nm.

[0024] Optionally, at least one infrared temperature measurement module is provided.

[0025] In the technical solution of the present utility model, the temperature of the drum cookware is measured by a non-contact infrared temperature measurement module, and the temperature of the induction heating part can be measured in real time. In this way, when the drum cookware rotates, the temperature measurement unit does not need to rotate, and the temperature measurement part is always in the electromagnetic heating belt coverage area, so as to realize the precise control of the temperature of the pot body in the magnetic field heating area. The temperature measurement unit structure of the drum-type cooking appliance of this solution is simple, does not need to be arranged in all directions, and is convenient for maintenance or replacement. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0027] Figure 1 It is a cross-sectional view of an embodiment of a drum-type cooking appliance with infrared temperature measurement function provided by the present utility model;

[0028] Figure 2 For Figure 1 It is a cross-sectional view in another working state in

[0029] Figure 3 For Figure 1 It is a cross-sectional view of the drum cookware in

[0030] In the figure: drum-type cooking appliance with infrared temperature measurement function - 100, drum cookware - 1, housing - 2, electromagnetic coil disk - 3, hollow structure - 31, infrared temperature measurement module - 4, indium gallium arsenide photodiode - 41.

[0031] The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0033] For a better description and illustration of the embodiments of the present application, one or more accompanying drawings may be referred to, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the utility models created by the present application, the currently described embodiments, or the preferred modes.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present utility model, rather than indicating that the device referred to must have a specific orientation or operate in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] Patent 202111370525.0 discloses a temperature control device and method. The solution adopted in this patent is contact temperature measurement technology. When the cookware is rotating, in order to measure the temperature of the heating area at any time, multiple contact temperature measurement probes must be set.

[0037] In view of this, the present utility model provides a drum-type cooking appliance with an infrared temperature measurement function. Figures 1-3 For an embodiment of the drum-type cooking appliance with an infrared temperature measurement function of the present utility model, please refer to Figures 1-3 , the drum-type cooking appliance 100 includes a housing 2, a drum cookware 1, and an infrared temperature measurement module 4.

[0038] Specifically, the drum cookware 1 is rotatably arranged inside the housing 2, which is also cylindrical and mainly used for light prevention. An electromagnetic induction coil disk 3 is arranged between the housing 2 and the drum cookware 1 for inductively heating the drum cookware 1; the infrared temperature measurement module 4 includes a circuit board (not shown in the figure) and an indium gallium arsenide photodiode 41 arranged on the circuit board. Among them, the photosensitive surface of the indium gallium arsenide photodiode 41 faces the outer surface of the drum cookware 1 and is used to receive the infrared light emitted by the cookware body to measure the temperature of this part. It should be understood that the position where the photosensitive surface of the indium gallium arsenide photodiode 41 faces should be the heating area of the electromagnetic induction coil disk 3; the circuit board has a signal amplification circuit, a signal processing circuit, etc., which are used to convert the electrical signal converted by the indium gallium arsenide photodiode 41 into a temperature signal after circuit processing. The infrared temperature measurement module 4 is connected to the whole machine control system.

[0039] In the technical solution of the present utility model, the drum cookware 1 is temperature-measured by the non-contact infrared temperature measurement module 4, and the temperature of the induction heating part can be measured in real time. In this way, when the drum cookware 1 rotates, the temperature measurement unit does not need to rotate, and the temperature measurement part is always in the electromagnetic heating zone, so as to realize the precise control of the temperature of the cookware body in the magnetic field heating area. The temperature measurement unit structure of the drum-type cooking appliance 100 of this solution is simple and does not need to be arranged in all directions, which is convenient for maintenance or replacement.

[0040] To prevent ambient light from irradiating on the photosensitive surface of the indium gallium arsenide photodiode 41 and affecting its reception of the infrared light emitted by the cookware body, please refer to Figure 1 , in an embodiment of the present utility model, a part of the cookware body of the drum cookware 1 is covered by the cylindrical housing 2, and the gap between the two is very small. The housing 2 forms a relatively light-sealed space between the housing 2 and the drum cookware 1. Of course, to achieve a certain light-sealing effect, the housing 2 may not be cylindrical as long as it can cover the heating area of the electromagnetic induction coil disk 3.

[0041] To enable the electromagnetic induction coil disk 3 to inductively heat the drum cookware 1, in an embodiment of the present utility model, the material of the drum cookware 1 is stainless steel or iron. Of course, as long as it is a magnetic conductive material, under the action of the alternating magnetic field of the electromagnetic induction coil disk 3, eddy currents can be generated to heat the cookware body.

[0042] To achieve the effect of stir-frying the drum cookware 1, in an embodiment of the present utility model, the drum-type cooking appliance 100 further includes a motor (not shown in the figure), and the rotating shaft of the motor is connected to the drum cookware 1 to drive the cookware body to rotate. It should be understood that a bracket is arranged inside the drum cookware 1 to stir-fry the dishes when the cookware body rotates.

[0043] Further, after the stir-frying is completed, the cookware body can be turned over to pour out the dishes, please refer to Figures 1 to 3, in an embodiment of the present utility model, the motor can not only drive the drum cookware 1 to rotate axially along the body of the pot, but also drive the drum cookware 1 to rotate radially around the body of the pot, so as to pour the cooked dishes onto the dish. It should be noted that two motors are required to drive the pot body to rotate axially or radially around the pot body respectively.

[0044] To facilitate the installation of the infrared temperature measurement module 4 and reduce the interference of ambient light, please refer to Figure 1 , in an embodiment of the present utility model, the infrared temperature measurement module 4 is arranged between the housing 2 and the drum cookware 1 and is located below the electromagnetic induction coil disk 3. Of course, the infrared temperature measurement module 4 can also be arranged outside the housing 2, and then the infrared temperature measurement module 4 needs to be provided with a light shielding structure. In this embodiment, the infrared temperature measurement module 4 further includes a shielding case, and the circuit board is installed in the shielding case. When the electromagnetic induction coil disk 3 works, the shielding case can shield the electromagnetic field generated by it to prevent the circuit board from generating interference current.

[0045] Furthermore, please refer to Figure 1 or Figure 2 , in an embodiment of the present utility model, the electromagnetic induction coil disk 3 is provided with at least one hollow structure 31 for irradiating the infrared light emitted by the pot body onto the photosensitive surface of the indium gallium arsenide photodiode 41. Among them, the electromagnetic induction coil disk 3 is longitudinally provided with the hollow structure 31, and the indium gallium arsenide photodiode 41 is arranged close to the hollow structure 31. Due to the limitation of the hollow structure 31, its photosensitive surface can further shield the ambient interference light and can better receive the infrared rays emitted by the pot body, making the temperature measurement more accurate. It should be understood that in the coil distribution structure of the electromagnetic induction coil disk 3, other hollow structures 31 are also provided to arrange multiple infrared temperature measurement modules 4. In addition, in some embodiments of the present utility model, the indium gallium arsenide photodiode 41 can also be completely placed in the hollow structure 31 or partially placed.

[0046] It should be noted that, in an embodiment of the present utility model, both the electromagnetic induction coil disk 3 and the infrared temperature measurement module 4 are fixedly installed on the housing 2, and the installation methods include bolt fixation, clamping, etc. Both the electromagnetic induction coil disk 3 and the infrared temperature measurement module 4 are separated from the drum cookware 1 and will not rotate with it.

[0047] In an embodiment of the present utility model, the sensitive wavelength of the indium gallium arsenide photodiode 41 is <1800 nm. Infrared rays in this wavelength range have strong penetration power for water, oil, and water vapor. When passing through these substances, the attenuation of infrared energy is very small. Infrared rays in this wavelength range also have a certain penetration power for some soft tissues such as vegetables and meats, so the temperature of deeper objects can be measured. The lowest temperature of an object that can be detected by infrared rays in this band is about 80 °C. As a more preferred embodiment, the sensitive wavelength of the indium gallium arsenide photodiode 41 is <2200 nm, and the lowest temperature of an object that can be detected by it is about 50 °C, with a wider temperature measurement range, but the cost is higher.

[0048] In addition, multiple infrared temperature measurement modules 4 can be arranged in the heating area of the electromagnetic coil disk 3 for multi-directional accurate measurement.

[0049] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0050] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A drum-type cooking appliance with infrared temperature measurement function, characterized in that: include: Housing (2); A drum cooker (1) is rotatably arranged on the shell (2), an electromagnetic coil disk (3) is arranged between the shell (2) and the drum cooker (1) for inductively heating the drum cooker (1); and An infrared temperature measurement module (4) comprises a circuit board and an indium gallium arsenide photodiode (41) arranged on the circuit board, wherein the photosensitive surface of the indium gallium arsenide photodiode (41) faces the outer surface of the drum cooker (1) and is used to receive infrared light emitted by the drum cooker body to measure the temperature thereof.

2. The drum-type cooking appliance with infrared temperature measurement function according to claim 1, characterized in that: At least part of the pot body of the drum cooker (1) is covered by the shell (2) to form a light-tight space.

3. The drum-type cooking appliance with infrared temperature measurement function according to claim 1, characterized in that: The drum cooker (1) is made of stainless steel or iron.

4. The drum-type cooking device with infrared temperature measurement function according to claim 1, characterized in that: It also comprises a motor, the rotating shaft of which is connected to the drum cooker (1) to drive the cooker body to rotate.

5. The drum-type cooking appliance with infrared temperature measurement function as claimed in claim 4, characterized in that: The motor also drives the drum cooker (1) to rotate radially around the cooker body.

6. The drum-type cooking device with infrared temperature measurement function according to claim 1, characterized in that: The infrared temperature measurement module (4) is arranged between the shell (2) and the drum cooker (1), and is located below the electromagnetic coil disk (3).

7. The drum-type cooking device with infrared temperature measurement function according to claim 6, characterized in that: The electromagnetic coil disk (3) is provided with at least one hollow structure (31) for irradiating the infrared light emitted by the pot body onto the photosensitive surface of the InGaAs photodiode (41).

8. The drum-type cooking device with infrared temperature measurement function according to claim 1, characterized in that: The electromagnetic coil disk (3) and the infrared temperature measurement module (4) are both fixedly mounted on the housing (2).

9. The drum-type cooking device with infrared temperature measurement function according to claim 1, characterized in that: The sensitive wavelength of the InGaAs photodiode (41) is less than 1800 nm.

10. The drum-type cooking device with infrared temperature measurement function according to claim 1, characterized in that: The infrared temperature measurement module (4) is provided with at least one.

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