A cookware with a shielding component and a preparation method thereof

Abstract

The present invention relates to the field of cookware preparation, and particularly to a method for preparing a cookware with a shielding component, comprising the following steps: preparing an inner layer and an outer layer, and fixing the bottom surface of the inner layer to the top of the outer layer; before or after fixing the inner layer to the top of the outer layer, further comprising the steps of opening at least one detection cavity on the outer layer, and arranging a shielding component at a position corresponding to the detection cavity at the bottom of the inner layer. The present invention can avoid the influence of magnetic field leakage on the infrared probe, and at the same time enable the inner pot to be heated evenly.

Description

Technical Field

[0001] The present invention relates to the field of cookware preparation, and particularly to a cookware with a shielding component and a preparation method thereof. Background Art

[0002] In the existing infrared temperature measuring cookware of the current art, an infrared probe is arranged on a cooker to detect the temperature of the outer bottom of the pot. However, in actual applications, what a cook needs to monitor is often the temperature of the inner pot close to the food ingredients. However, when an infrared probe is arranged on the cooker to detect the temperature of the inner pot, only the temperature of the outer layer of the cookware can be detected, and electromagnetic signals and magnetic fields will pass through the cookware to form a circulating current and interfere with the probe, so that the accurate temperature of the inner pot cannot be obtained; in addition, equipment such as cookers also causes the temperature of the infrared probe to rise sharply, which not only results in low measurement accuracy, but may even damage the infrared probe seriously in severe cases.

[0003] Therefore, how to accurately and without interference measure the actual temperature inside the cookware has become a problem to be solved in this field. Summary of the Invention

[0004] To improve the above technical problems, the present invention provides a preparation method of a cookware with a shielding component, including the following steps:

[0005] Prepare an inner layer and an outer layer, and fix the bottom surface of the inner layer to the top of the outer layer facing the outer layer.

[0006] Before or after fixing the inner layer to the top of the outer layer, it further includes the step of opening at least one detection cavity on the outer layer and arranging a shielding component at a position corresponding to the bottom of the inner layer and the detection cavity.

[0007] According to an embodiment of the present invention, the bottom of the shielding component protrudes from the lowest point of the detection cavity.

[0008] Preferably, the height difference between the bottom of the shielding component and the lowest point of the detection cavity is less than 5 mm, more preferably, the height difference is less than 4 mm, and further preferably, the height difference is less than 3 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any value within the range formed by the above point values.

[0009] Preferably, the number of the detection cavities is at least one, one or more shielding components are arranged at positions corresponding to the detection cavities, and the heights of different shielding components can be the same or different.

[0010] Preferably, the outer layer is provided with a plurality of detection cavities, and at least one shielding component is arranged at a position corresponding to each detection cavity of the inner layer;

[0011] Preferably, the shielding member is connected to the bottom of the inner layer by bonding or welding, preferably by bonding with a high-temperature resistant adhesive, thermocompression welding or soldering paste welding, such as soldering paste welding.

[0012] According to an embodiment of the present invention, an insulation cavity structure is provided between the outer layer and the inner layer, and the insulation cavity is filled with air or inert gas;

[0013] Preferably, an insulation layer is provided in the insulation cavity, and the insulation layer covers at least a part of the area of the insulation cavity, such as the middle area; more preferably, there is a certain gap between the outer layer, the inner layer and the insulation layer; further preferably, the insulation layer is disposed closely to the outer layer or the inner layer;

[0014] Before fixing the inner layer on the top of the outer layer, the following steps are further included: preparing an insulation layer and fixing the insulation layer on the top of the outer layer;

[0015] Preferably, the inner layer is fixed on the top of the insulation layer;

[0016] Preferably, before fixing the insulation layer on the top of the outer layer, the step of opening a through hole corresponding to the shielding member on the insulation layer is further included;

[0017] Preferably, preparing the insulation layer includes: cutting the insulation medium;

[0018] Preferably, before cutting the insulation medium, the step of covering a protective layer on the insulation medium is further included;

[0019] Preferably, before fixing the inner layer on the top of the outer layer, the following steps are further included: removing the protective layer on the insulation medium;

[0020] For example, preparing the insulation layer includes: wrapping the insulation material with a protective layer, then cutting and opening holes in the insulation material to obtain the insulation layer. Preferably, the protective layer is a high-temperature resistant fiberglass paper.

[0021] According to an embodiment of the present invention, preparing the inner layer includes: shaping the inner layer material and providing an infrared radiation layer and a shielding member at the bottom of the inner layer;

[0022] Preferably, shaping the inner layer material includes: stretching or stamping the electromagnetic heating material;

[0023] Preferably, providing an infrared radiation layer and a shielding member at the bottom of the inner layer includes the following steps: first providing an infrared radiation layer at the bottom of the inner layer, and then providing a shielding ring; more preferably, the step of providing an infrared radiation layer on the shielding ring is further included;

[0024] Preferably, setting the infrared radiation layer and the shielding component at the bottom of the inner layer includes the following steps: first set the shielding component at the bottom of the inner layer, and then set the infrared radiation layer;

[0025] Preferably, the shielding component is located in the area covered by the infrared radiation layer;

[0026] For example, preparing the inner layer includes: forming an electromagnetic heating material such as a 430 stainless steel metal part by stamping or stretching processes, spraying an infrared radiation coating with a wavelength of 6 - 16 μm and an infrared emissivity greater than 95% on the bottom and drying it, fixing the shielding component on the bottom using soft solder paste, and spraying an infrared radiation layer on the shielding component.

[0027] According to an embodiment of the present invention, preparing the outer layer includes injection - molding the outer layer at one time;

[0028] Preferably, preparing the outer layer further includes the step of opening a detection cavity on the outer layer;

[0029] Preferably, preparing the inner layer further includes: setting a first connecting ear on the outer side of the inner layer;

[0030] Preferably, preparing the outer layer further includes setting a limiting boss at the position corresponding to the first connecting ear on the outer layer, and there is a connecting groove on the top of the limiting boss;

[0031] Preferably, the gap between the top of the limiting boss and the bottom of the first connecting ear is less than 1 mm.

[0032] According to an embodiment of the present invention, fixing the bottom of the inner layer facing the outer layer on the top of the outer layer includes: placing the inner layer on the top of the heat - insulating layer, inserting the shielding component into the opening of the heat - insulating layer, pre - pressing the inner layer until the heat - insulating layer enters the inside of the outer layer, and the distance between the bottom and the inner bottom of the outer layer is 3 - 8 cm.

[0033] Inject glue into the connecting groove of the limiting boss, and press the inner layer down until the bottom of the first connecting ear adheres to the glue to obtain the cookware.

[0034] According to an embodiment of the present invention, the heat - insulating layer includes a base material, and the inside of the base material is filled with a heat - insulating medium. Preferably, the heat - insulating medium is, for example, a heat - insulating gel, and the base material is fiberglass cloth, pre - oxidized fiber or ceramic fiber.

[0035] Preferably, the protective layer is a high - temperature - resistant paper or a high - temperature - resistant cloth, such as fiberglass paper or aramid cloth.

[0036] Preferably, the outer layer is a non - magnetic non - metallic material, for example, made of plastic, ceramic or glass, preferably made of a plastic with a heat - resistant temperature higher than 120 °C.

[0037] Preferably, the inner layer material is an electromagnetic heating material.

[0038] Preferably, the emission wavelength of the infrared radiation layer is 10 μm to 50 μm, more preferably 25 to 35 μm. The infrared radiation layer is selected from infrared radiation materials with an infrared emission efficiency of greater than or equal to 95%. Preferably, the infrared radiation material is NiO-Cr2O3-SiC, Fe2O3-MnO2-CuO or Fe2O3-MnO2-Co2O3-CuO, such as a nano-graphene ceramic coating.

[0039] Preferably, the thickness of the infrared radiation layer is 0.1 - 3 μm, more preferably 0.5 - 1.5 μm, further preferably 0.8 - 1.2 μm. For example, it is 0.2 μm, 0.4 μm, 0.5 μm, 1 μm.

[0040] Preferably, the number of the shielding components is greater than or equal to 1, more preferably 2 - 5. For example, it is 1, 2, 3, 4 or 5.

[0041] Preferably, the shielding component is an electromagnetic shielding component, more preferably a copper ring, an aluminum ring or a steel ring, such as an aluminum ring.

[0042] According to an embodiment of the present invention, after passing through the heat insulation layer, the shielding component is located inside or outside the outer layer.

[0043] When the shielding component is located inside the outer layer, the end of the shielding component is located between the heat insulation layer and the shielding component, or the end of the shielding component is in contact with the outer layer.

[0044] Preferably, the shielding component abuts against the inner bottom of the outer layer. Preferably, the shielding component is fixed to the inner bottom of the outer layer. Preferably, the shielding component is located inside the outer layer.

[0045] When the shielding component is located outside the outer layer, the end of the shielding component passes through the outer layer and is exposed to the outside of the cookware.

[0046] A cookware with a shielding component prepared by the above method, which includes an inner layer and an outer layer connected to each other, and a heat insulation cavity is between the inner layer and the outer layer;

[0047] A shielding component is provided on the inner layer. After passing through the heat insulation layer, the shielding component is fixed to the inner bottom of the outer layer or fixed to the outside of the outer layer after passing through the heat insulation layer.

[0048] Preferably, the heat insulation cavity is a cavity structure. Preferably, a heat insulation layer is provided in the heat insulation cavity.

[0049] According to an embodiment of the present invention, an infrared radiation layer is provided at the bottom of the inner layer;

[0050] Preferably, the cookware is an arc-shaped pot, a square pot or a round-bottomed pot; preferably, a pot lid is provided at the top of the cookware, and a handle is provided on the pot lid;

[0051] Preferably, a first connecting ear is provided on the outer side of the inner layer; preferably, a limiting boss is provided at a position corresponding to the first connecting ear on the outer layer, and a connecting groove is provided at the top of the limiting boss.

[0052] Beneficial effects

[0053] (1) In the preparation method of the cookware with a shielding component in the present invention, at least one shielding component is provided in the heating area of the inner layer, and the height difference between the bottom of the shielding component and the lowest point of the detection cavity is less than 5 mm. When in use, the cookware needs to be placed on a magnetically conductive support surface. When the infrared temperature measurement probe on the cooker detects the temperature of the inner layer, the magnetic field will pass through the cookware and then return reversely through the detection cavity and pass through the detection probe to interfere with the probe, resulting in a sharp rise in the temperature of the infrared probe. This not only leads to low measurement accuracy, but in severe cases, it may even damage the infrared probe. The shielding component can shield the magnetic field and refract the magnetic field towards the outer layer direction. This not only avoids the influence of the magnetic field leakage on the infrared probe, but also enables the inner pot to be heated evenly.

[0054] (1) In the preparation method of the cookware with a shielding component in the present invention, during the preparation of the heat insulation layer, the heat insulation material is first wrapped with a protective layer and then cut and perforated. Since the heat insulation material includes glass fiber and gel provided in the glass fiber, if the heat insulation material is exposed, the glass fiber is relatively sharp, which will harm the staff, and it will also float into the air and be inhaled into the body, which is dangerous. At the same time, the gel will also fall out of the glass fiber, affecting the heat insulation effect. By the pre-wrapping method, it can effectively avoid the harm of the glass fiber to the human body and maintain the heat insulation effect of the heat insulation material. Description of the drawings

[0055] Figure 1 It is a schematic structural diagram of the cookware in the embodiment of the present invention.

[0056] Figure 2 It is an exploded view of the cookware in the embodiment of the present invention;

[0057] Figure 3 It is a partial schematic diagram of the heat insulation layer;

[0058] Figure 4 It is a step diagram of the outer layer, the heat insulation layer and the inner layer being crimped;

[0059] Figure 5 It is a schematic structural diagram of the cookware without a heat insulation layer;

[0060] Figure 6 It is a schematic structural diagram of a cookware with a heat insulation layer;

[0061] Figure 7 It is Figure 6 an enlarged view of part I in

[0062] In the figure: 1 - inner layer, 2 - outer layer, 3 - heat insulation layer, 4 - first connecting ear, 5 - shielding component, 6 - limiting boss, 7 - connecting groove, 8 - infrared radiation layer, 9 - protective layer, 10 - detection cavity. Specific embodiments

[0063] The following will further elaborate on the general formula compounds of the present invention, their preparation methods and applications in combination with specific embodiments. It should be understood that the following embodiments are only for illustrative and explanatory purposes of the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the above content of the present invention are covered within the scope of protection intended by the present invention.

[0064] Unless otherwise specified, the raw materials and reagents used in the following embodiments are all commercially available products, or can be prepared by known methods.

[0065] Example 1

[0066] The cookware is divided into a three - layer structure. The inner layer 1 is a heating layer, the outer layer 2 is a support layer, and the middle layer is a heat insulation layer 3. Among them, the inner layer 1 is used for heating and heating the food in the cookware, and the outer layer 2 is used for supporting the inner layer 1 and / or the heat insulation layer 3.

[0067] The cookware can cooperate with an electromagnetic heating device to heat the food in the pot. The electromagnetic heating device can be an electromagnetic coil. An alternating current with high - frequency changes flows through the electromagnetic coil. The high - frequency alternating current will generate an alternating electromagnetic field. According to the principle of electromagnetic induction heating, after placing the cookware above the electromagnetic coil, the electromagnetic energy is radiated to the cookware, and eddy currents are generated in the cookware. The cookware is heated through the thermal effect of the eddy currents, thereby realizing the conversion of electrical energy into thermal energy to heat the cookware. Preferably, the inner layer 1 is made of an electromagnetic heating material to heat the food in the cookware through the thermal effect of the eddy currents. Optionally, the inner layer 1 can be a stainless - steel metal part.

[0068] In some alternative embodiments of the present invention, the inner layer 1 is set as an approximately U - shaped structure with an open upper part. Under the action of the alternating magnetic field, the entire inner layer 1 can generate heat to heat the food, enabling the food in the cookware to be evenly heated, improving the cooking taste, and avoiding burning.

[0069] The processing steps of the cookware in this embodiment are as follows:

[0070] Step 1) Prepare the inner layer 1 and the outer layer 2.

[0071] Step 2) Fix the bottom surface of the inner layer to the top of the outer layer facing the outer layer.

[0072] Before step 2), it further includes the step of preparing a heat insulation layer 3 and fixing the heat insulation layer 3 to the top of the outer layer 2.

[0073] The inner layer 1 and the outer layer 2 have similar shapes. When manufacturing the cookware, the inner layer 1 is sleeved into the outer layer 2 and fixed to the inside of the outer layer 2, that is, the bottom surface of the inner layer 1 is fixed to the top of the outer layer 2 facing the outer layer 2. Among them, a certain gap may be reserved between the inner layer 1 and the outer layer 2 and / or other structural layers may be provided.

[0074] It should be noted that it further includes the step of opening at least one detection cavity 10 on the outer layer 2 and arranging a shielding component 5 at a position corresponding to the bottom of the inner layer 1. The detection cavity 10 and the shielding component 5 can be arranged in the following two ways:

[0075] Before step 2), first arrange the shielding component 5 on the inner layer 1 and open the detection cavity 10 on the outer layer 2, and then complete step 2), which avoids the mutual influence between the inner layer 1 and the inner layer 2 during the processing and reduces the processing difficulty.

[0076] After step 2), first fix the inner layer 1 and the outer layer 2 together, and then open the detection cavity 10 and install the shielding component 5, so that there is a definite position of the detection cavity 10 when installing the shielding component 5, avoiding the position of the shielding component 5 deviating from the detection cavity 10.

[0077] Among them, the numbers of the detection cavity 10 and the shielding component 5 are both set according to actual needs.

[0078] As an example, a detection cavity 10 is opened at the bottom of the outer layer 2, and at least one shielding component 5 is arranged on the surface of the bottom of the inner layer 1 facing the outer layer 2, and the shielding component 5 protrudes from the detection cavity 10, that is, the shielding component 5 arranged at the bottom of the inner layer 1 corresponds to the detection cavity 10.

[0079] As another example, a plurality of detection cavities 10 are opened at the bottom of the outer layer 2, such as 2, 3, 4 or more. Among them, one or more shielding components 5 can be arranged in each detection cavity 10, such as 1, 2, 3, 4 or more, and no specific limitation is made here.

[0080] At the bottom of the inner layer 1, a shielding component 5 is pasted with a high-temperature resistant material such as thermal conductive silicone (or a high-temperature hot pressing process can also be used). The shielding component 5 is made of an electromagnetic shielding material, which can be a copper ring, an aluminum ring or a steel ring. For example, it is an aluminum ring. The aluminum ring protrudes from the bottom of the inner layer 1 and extends into the detection cavity 10. The height of the aluminum ring can extend to the range where the thickness of the heat insulation layer 3 is located, or can also extend to the range where the thickness of the outer layer 2 is located. It can also protrude outside the outer layer 2, that is, the height of the aluminum ring extends beyond the surface of the outer layer 2 on the side away from the outer layer 1. The bottom of the shielding component 5 is higher than the lowest point of the detection cavity 10.

[0081] In this embodiment, the position of the shielding component 5 is set in the following manner: the height difference between the bottom of the shielding component 5 and the lowest point of the detection cavity 10 is less than 5 mm. Preferably, the height difference is less than 4 mm. Further preferably, the height difference is less than 3 mm. For example, it is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any value within the range formed by the above point values.

[0082] The shielding component 5 is connected to the bottom of the inner layer 1 by bonding or welding, and can be bonded by a high-temperature resistant adhesive, hot press welding or soft solder paste welding. For example, it is welded by soft solder paste.

[0083] Preparation of the inner layer 1 and related parameters:

[0084] The inner layer 1 is prepared by forming an electromagnetic heating material through processes such as stamping or stretching. Then, an infrared radiation layer and a shielding component 5 are provided at the bottom of the inner layer 1. At the same time, a first connecting ear 4 is provided on the outer side of the inner layer 1. The first connecting ear 4 is used for the fixed connection between the inner layer 1 and the outer layer 2 and can also be used as a handle to avoid scalding.

[0085] As an example, setting the infrared radiation layer and the shielding component 5 at the bottom of the inner layer 1 is carried out as follows: First, an infrared radiation layer is provided at the bottom of the inner layer 1 (i.e., the bottom surface close to the outer layer 2), then the shielding ring 5 is provided, and then an infrared radiation layer is provided on the shielding ring 5. For example, after forming a 430 stainless steel metal piece of electromagnetic heating material through stamping or stretching, an infrared radiation coating 8 with a wavelength of 6 - 16 μm and an infrared emissivity greater than 95% is sprayed on the bottom and dried. The shielding component 5 is fixed at the bottom with soft solder paste, and an infrared radiation layer is sprayed on the shielding component 5.

[0086] Or, setting the infrared radiation layer and the shielding component 5 at the bottom of the inner layer 1 is carried out as follows: First, the shielding component 5 is provided at the bottom of the inner layer 1, and then the infrared radiation layer is provided.

[0087] The shielding component 5 is located in the area covered by the infrared radiation layer. When a temperature measuring component such as an infrared sensor measures the temperature, it can ensure that the temperature measuring reflection area is covered with the infrared radiation layer, which can ensure the accuracy of temperature detection.

[0088] The selection of the infrared radiation layer can be prepared from an infrared radiation material that can ensure an emissivity of infrared light with a wavelength of 6 μm to 16 μm above 95%. It can be carried out by direct spraying, and the spraying range can be larger than the preset measurement area. During this process, a fixture can also be used for shielding during spraying, and it is dried after spraying. The infrared radiation layer has an infrared emissivity of more than 95%, which increases the infrared reception amount of the infrared probe, thereby improving the accuracy of temperature detection.

[0089] In this embodiment, the emission wavelength of the infrared radiation material is 10 μm to 50 μm, more preferably 25 to 35 μm. The infrared radiation material is NiO-Cr2O3-SiC, Fe2O3-MnO2-CuO, or Fe2O3-MnO2-Co2O3-CuO; the thickness of the infrared radiation layer is 0.1 - 3 μm.

[0090] Preparation of the outer layer 2 and related parameters:

[0091] The outer layer 2 is obtained by one-step injection molding of raw materials such as plastics, ceramics, and glass. The raw materials of the outer layer 2 can be plastics with a heat resistance temperature higher than 120°C. A limiting boss 6 can also be provided at the position corresponding to the first connecting ear 4 on the outer layer 2, and a connecting groove 7 is provided at the top of the limiting boss 6. The gap between the top of the limiting boss 6 and the bottom of the first connecting ear 4 is less than 1 mm.

[0092] In other possible embodiments, the first connecting ear 4 may not be provided on the inner layer 1, and the limiting boss 6 may not be provided on the corresponding outer layer 2. The inner layer 1 and the outer layer 2 can be fixed by other means, such as setting buckles or protrusions on the inner layer 1 and / or the outer layer 2, or bonding and fixing, etc., which are not limited herein.

[0093] During use, the cookware needs to be placed on a magnetically conductive support surface. When the infrared temperature measurement probe on the cooker detects the temperature of the inner layer, the magnetic field will pass through the cookware and then return reversely through the detection cavity and pass through the detection probe to interfere with the probe, causing the temperature of the infrared probe to rise sharply. This not only results in low measurement accuracy but may even damage the infrared probe severely. The shielding component can shield the magnetic field and refract the magnetic field outward, not only avoiding the influence of the magnetic field leakage on the infrared probe but also enabling the inner pot to be heated evenly.

[0094] In some possible embodiments of the present invention, the inner layer 1 is placed on top of the heat insulation layer 3. Preferably, the inner layer 1 is similar in shape to the heat insulation layer 3, and the inner layer 1 is sleeved inside the heat insulation layer 3. The shielding member 5 is inserted into the opening of the heat insulation layer 3, and the inner layer 1 and the heat insulation layer 3 are pre-pressed into the inside of the outer layer 2, and the distance between the bottom and the inner bottom of the outer layer 2 is 3-8 cm, that is, after pre-pressing, the distance between the bottom surface of the heat insulation layer away from the inner layer 1 and the bottom surface of the outer layer close to the inner layer 1 is 3-8 cm, leaving an operating space for injecting glue between the inner layer 1 and the inner layer 2 for bonding later. Glue is injected into the connecting groove 7 of the limiting boss 6, and the inner layer 1 is pressed down until it is bonded to the bottom of the first connecting ear 4 with the glue to obtain a cookware.

[0095] Before step 2), the manufacturing method of the cookware with a shielding member further includes:

[0096] The heat insulation layer 3 includes a base material, and the base material is filled with a heat insulation medium. Preferably, the heat insulation medium is, for example, a heat insulation gel, and the base material is fiberglass cloth, pre-oxidized fiber or ceramic fiber;

[0097] Preferably, the protective layer 9 is a high-temperature resistant paper or cloth, such as fiberglass paper or aramid cloth;

[0098] Preferably, the outer layer 2 is made of plastic, ceramic or glass.

[0099] The material of the inner layer 1 is an electromagnetic heating material.

[0100] Preparation and related parameters of the heat insulation layer 3:

[0101] Provide a sandwich fiberglass base material with openings, and the base material is filled with aerogel (heat insulation medium). When processing the openings of the sandwich, it can be cut after being wrapped with high-temperature resistant fiberglass paper for protection, or wrapped after cutting (fiberglass is easy to stab the skin and can float in the air and be inhaled into the body causing health damage; in addition, such an operation can also prevent the loss of aerogel and affect the heat preservation effect). If it is an arc-shaped pot or a square pot, the whole fiberglass base material can be cut into shape. If it is a flat-bottom round pot, it can be cut into the bottom and the side. The preparation method of the heat insulation layer 3 includes but is not limited to the above methods.

[0102] For example, preparing the heat insulation layer includes: wrapping the heat insulation material with the protective layer 9, and then cutting and opening holes (opening through holes corresponding to the shielding member) in the heat insulation material to obtain the heat insulation layer 3. Preferably, the protective layer 9 is high-temperature resistant fiberglass paper, which is used to protect the heat insulation layer 3 to prevent it from being damaged during the preparation process, thereby avoiding the deterioration of the heat insulation effect caused by the damage of the heat insulation layer 3, and thus improving the heat insulation effect.

[0103] After the preparation of the thermal insulation layer 3 is completed, the protective layer 9 on the thermal insulation medium can be optionally removed first, and the thermal insulation layer 3 can be set between the inner layer 1 and the outer layer 2. Specifically, the thermal insulation layer 3 can be first fixed on the top of the outer layer 2, the thermal insulation layer 3 can be sleeved inside the outer layer 2, the thermal insulation layer 3 can be sleeved outside the inner layer 1, or the inner layer 1 can be fixed on the top of the thermal insulation layer 3.

[0104] The preparation of the inner layer 1, the outer layer 2 and the heat insulating layer 3 can be carried out simultaneously.

[0105] See also Figure 6 and 7 As shown, when the cookware is used in conjunction with a thermometer (infrared thermometer), the thermometer includes a nickel-zinc magnetic ring and an infrared sensor wrapped inside the magnetic ring. The bottom of the nickel-zinc magnetic ring is against the bottom of the outer layer 2. The infrared sensor transmits a detection signal to the inner layer 1 through the detection cavity 10 to detect the temperature of the inner layer 1. The cookware is heated by the electromagnetic coil.

[0106] Figure 7 In the figure, A is the distance between the bottom of the shielding component 5 and the top of the nickel-zinc magnetic ring, which is less than 5 mm, preferably 2-3 mm, to reduce the heat conduction from the pot to the nickel-zinc magnetic ring and thus affect the ambient temperature of the infrared sensor. Therefore, a certain gap needs to be reserved. If the gap is too large, the electromagnetic field of the induction cooker will enter the infrared sensor area through the gap, causing the sensor to be inaccurate in temperature measurement due to electromagnetic interference.

[0107] B is the distance between the outer radius of the shielding component 5 and the inner radius of the electromagnetic coil. The distance is preferably greater than zero to prevent the cookware shielding component 5 from being directly set above the electromagnetic coil and the electromagnetic field from heating the shielding component 5. Too high a temperature of the shielding component 5 is not conducive to the accuracy of temperature measurement. The distance between the outer radius of the shielding component 5 and the inner radius of the electromagnetic coil is set to be greater than zero, that is, the shielding component 5 and the electromagnetic coil are staggered on the horizontal projection plane, which can prevent the shielding component 5 from being too high and improve the accuracy of temperature measurement.

[0108] C is the overlapping length of the inner radius of the shielding component 5 and the outer radius of the nickel-zinc magnetic ring in the horizontal direction. The overlapping length is set to be greater than zero, but is limited to the shielding component 5 not blocking the temperature measuring window of the infrared sensor. Preferably, the shielding component 5 overlaps with the side of the nickel-zinc magnetic ring away from the center of the bottom of the cookware on the side close to the bottom center of the cookware, and the magnetic flux density at the position of the infrared sensor is first reduced by the nickel-zinc magnetic ring, and then the shielding component 5 generates heat in the remaining weak magnetic field to further reduce the magnetic flux density at the position of the infrared sensor, thereby reducing the electromagnetic interference to the infrared sensor as much as possible. By arranging the shielding component 5 to overlap with the side of the nickel-zinc magnetic ring away from the center of the bottom of the cookware on the side close to the bottom center of the cookware, and the overlapping length is greater than zero, the missing area between the nickel-zinc magnetic ring and the shielding component 5 is made smaller, thereby reducing the interference of the electromagnetic field to the infrared sensor.

[0109] In some alternative embodiments of the present invention, a cookware with a shielding component is provided, which includes an inner layer 1 and an outer layer 2. The inner layer 1 and the outer layer 2 are connected. Specifically, they can be connected by the bonding method in the above embodiments, or by other connection methods such as snap connections, which are not limited herein. Different from the above embodiments, an insulating cavity is provided between the inner layer 1 and the outer layer 2 to replace the heat-insulating layer 3 in the above embodiments. The insulating cavity can be filled with air, filled with inert gas, or set to a vacuum or near-vacuum state. In this case, due to the poor heat transfer performance of the gas or the near-vacuum space, the insulating cavity has the functions of heat insulation and heat preservation. It can be understood that when a detection cavity 10 is provided on the outer layer and a shielding component 5 is provided at a position corresponding to the bottom of the inner layer 1 and the detection cavity 10, since the insulating cavity is communicated with the outside world, at this time, the insulating cavity is an open space filled with air, that is, a cavity.

[0110] Optionally, an insulating layer 3 is provided in the insulating cavity. The insulating layer 3 can occupy a part of the space of the insulating cavity. Specifically, the insulating layer 3 can be provided in the middle area of the insulating cavity, having a certain distance from both the inner layer 1 and the outer layer 2. The insulating layer 3 can also be provided on the side of the insulating cavity close to the inner layer 1 and be closely attached to the inner layer 1. The insulating layer 3 can also be provided on the side of the insulating cavity close to the outer layer 2 and be closely attached to the outer layer 2. Setting both the insulating cavity and the insulating layer 3, and making the insulating layer 3 occupy a part of the space of the insulating cavity, can integrate the advantages of the insulating layer and the insulating cavity, so that the heat transfer is blocked by both the insulating cavity and the insulating layer 3, improving the heat insulation effect.

[0111] In some alternative embodiments of the present invention, preferably, the cookware is an arc-shaped pot, a square pot or a round-bottomed pot, which is not limited in the present invention; preferably, a pot cover is provided on the top of the cookware, and a handle is provided on the pot cover for the convenience of the user to pick up.

[0112] Preferably, a first connecting ear 4 is provided on the outer side of the inner layer 1. Among them, the first connecting ear 4 can be used to connect with the insulating layer 3 and / or the outer layer 2. At the same time, after the first connecting ear 4 is fixedly connected with the corresponding structure connecting with the insulating layer 3 and / or the outer layer 2, it can be used as a handle for the user to pick up the cookware to avoid scalding when picking up and placing the cookware. Among them, a structure connecting with the first connecting ear 4 can also be provided on the insulating layer 3, which is not limited.

[0113] Preferably, a limiting boss 6 is provided at a position corresponding to the first connecting ear 4 on the outer layer 2. A connecting groove 7 is provided on the top of the limiting boss 6. When the inner layer 1 and the outer layer 2 are connected, the bottom surface of the first connecting ear 4 on the side close to the outer layer 2 is close to the top surface of the limiting boss 6 on the side close to the inner layer 1. The connecting groove 7 provided on the limiting boss 6 can be fixedly connected with the bottom surface of the first connecting ear 4. Preferably, a protrusion corresponding to the connecting groove 7 is provided on the bottom surface of the first connecting ear 4 to cooperate with the connecting groove 7, thereby fixing the inner layer 1 and the inner layer 2.

[0114] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of a cookware with a shielding component, characterized in that, It includes the following steps: Prepare the inner layer (1) and the outer layer (2), and fix the bottom surface of the inner layer (1) facing the outer layer (2) on the top of the outer layer (2); Preparing the outer layer (2) includes preparing the outer layer (2) by one-shot injection molding; Before or after fixing the inner layer (1) on the top of the outer layer (2), it further includes the step of opening at least one detection cavity (10) on the outer layer (2); Preparing the inner layer (1) includes the following steps: molding the inner layer material, and setting an infrared radiation layer and a shielding component (5) at the bottom of the inner layer (1); Setting the infrared radiation layer and the shielding component (5) at the bottom of the inner layer (1) includes the following steps: first setting the infrared radiation layer at the bottom of the inner layer (1), and then setting the shielding component (5); or first setting the shielding component (5) at the bottom of the inner layer (1), and then setting the infrared radiation layer; the shielding component (5) is set at the position corresponding to the detection cavity (10) at the bottom of the inner layer (1).

2. The preparation method of the cookware with a shielding component according to claim 1, characterized in that: The bottom of the shielding component (5) protrudes from the lowest point of the detection cavity (10).

3. The preparation method of the cookware with a shielding component according to claim 2, characterized in that, The height difference between the bottom of the shielding component (5) and the lowest point of the detection cavity (10) is less than 5 mm.

4. The preparation method of the cookware with a shielding component according to claim 3, characterized in that, The height difference between the bottom of the shielding component (5) and the lowest point of the detection cavity (10) is less than 4 mm.

5. The preparation method of the cookware with a shielding component according to claim 1, characterized in that, The number of the detection cavities (10) is at least one, and one or more shielding components (5) are provided at the corresponding positions of the detection cavities (10), and the heights of different shielding components (5) are the same or different.

6. The preparation method of the cookware with a shielding component according to claim 5, characterized in that, The shielding component (5) is connected to the bottom of the inner layer (1) by bonding or welding.

7. The preparation method of the cookware with a shielding component according to claim 6, characterized in that, The shielding component (5) is connected to the bottom of the inner layer (1) by bonding with a high-temperature resistant adhesive, hot press welding or soft solder paste welding.

8. The preparation method of the cookware with a shielding component according to any one of claims 1-6, characterized in that, Between the outer layer (2) and the inner layer (1) is a heat insulation cavity structure, and the heat insulation cavity is filled with air or inert gas.

9. The preparation method of the cookware with a shielding component according to claim 8, characterized in that, A heat insulation layer (3) is provided in the heat insulation cavity, and the heat insulation layer (3) covers at least a part of the area of the heat insulation cavity.

10. The preparation method of the cookware with a shielding component according to claim 9, characterized in that, There is a gap between the outer layer (2), the inner layer (1) and the heat insulation layer (3).

11. The preparation method of the cookware with a shielding component according to claim 9, characterized in that, The heat insulation layer (3) is provided close to the outer layer (2) or the inner layer (1).

12. The preparation method of the cookware with a shielding component according to claim 9, characterized in that, Before fixing the inner layer (1) on the top of the outer layer (2), it further includes the following steps: preparing the heat insulation layer (3), and fixing the heat insulation layer (3) on the top of the outer layer (2).

13. The preparation method of the cookware with a shielding component according to claim 12, characterized in that, Fix the inner layer (1) on the top of the heat insulation layer (3).

14. The preparation method of the cookware with a shielding component according to claim 12, characterized in that, Before fixing the heat insulation layer (3) on the top of the outer layer (2), it further includes the step of opening through holes corresponding to the shielding components (5) on the heat insulation layer (3).

15. The preparation method of the cookware with a shielding component according to claim 12, characterized in that, Preparing the heat insulation layer (3) includes: cutting the heat insulation medium.

16. The preparation method of the cookware with a shielding component according to claim 15, characterized in that Before cutting the heat insulation medium, it further includes the step of coating a protective layer (9) on the heat insulation medium.

17. The preparation method of the cookware with a shielding component according to claim 16, characterized in that Before fixing the inner layer (1) on the top of the outer layer (2), it further includes the following steps: removing the protective layer (9) on the heat insulation medium.

18. The preparation method of the cookware with a shielding component according to claim 16, characterized in that Preparing the heat insulation layer includes: wrapping the heat insulation material with the protective layer (9), and then cutting and opening holes in the heat insulation material to obtain the heat insulation layer (3).

19. The preparation method of the cookware with a shielding component according to any one of claims 1 - 6, characterized in that The molding of the inner layer material includes: stretching or stamping the electromagnetic heating material.

20. The preparation method of the cookware with a shielding component according to any one of claims 1 - 6, characterized in that After an infrared radiation layer and a shielding member (5) are provided at the bottom of the inner layer (1), it further includes providing an infrared radiation layer on the shielding member (5), and the shielding member (5) is located in the area covered by the infrared radiation layer.

21. The preparation method of the cookware with a shielding component according to any one of claims 1 - 6, characterized in that Preparing the inner layer (1) includes: after forming the electromagnetic heating material by stamping or stretching processes, spraying an infrared radiation coating with a wavelength of 6 - 16 μm and an infrared emissivity greater than 95% on the bottom and drying it, fixing the shielding member (5) on the bottom using soft solder paste, and spraying an infrared radiation layer on the shielding member (5).

22. The preparation method of the cookware with a shielding component according to claim 1, characterized in that Preparing the inner layer (1) further includes: providing a first connecting ear (4) on the outer side of the inner layer (1).

23. The preparation method of the cookware with a shielding component according to claim 22, characterized in that Preparing the outer layer (2) further includes providing a limiting boss (6) at the position corresponding to the first connecting ear (4) on the outer layer (2), and providing a connecting groove (7) at the top of the limiting boss (6).

24. The preparation method of the cookware with a shielding component according to claim 23, characterized in that The gap between the top of the limiting boss (6) and the bottom of the first connecting ear (4) is less than 1 mm.

25. The preparation method of the cookware with a shielding component according to claim 23, characterized in that Inject glue into the connecting groove (7) of the limiting boss (6), and press the inner layer (1) down to bond it with the glue at the bottom of the first connecting ear (4) to obtain a cookware.

26. The preparation method of the cookware with a shielding component according to claim 9, characterized in that The heat insulation layer (3) includes a base material, and the base material is filled with a heat insulation medium inside.

27. The preparation method of the cookware with a shielding component according to claim 26, characterized in that The heat insulation medium is a heat insulation gel, and the base material is fiberglass cloth, pre-oxidized fiber or ceramic fiber.

28. The preparation method of the cookware with a shielding component according to claim 16, characterized in that The protective layer (9) is a high-temperature resistant paper or a high-temperature resistant cloth.

29. The preparation method of the cookware with a shielding component according to claim 28, characterized in that The protective layer (9) is fiberglass paper or aramid cloth.

30. The preparation method of the cookware with a shielding component according to any one of claims 1 - 6, characterized in that The outer layer (2) is made of plastic, ceramic or glass.

31. The preparation method of the cookware with a shielding component according to any one of claims 1 - 6, characterized in that The material of the inner layer is an electromagnetic heating material.

32. The preparation method of the cookware with a shielding component according to any one of claims 1-6, characterized in that, The infrared radiation layer is selected from infrared radiation materials with an emission wavelength of 10 μm to 50 μm and an infrared emission efficiency greater than or equal to 95%.

33. The preparation method of the cookware with a shielding component according to claim 32, characterized in that, The infrared radiation material is NiO-Cr2O3-SiC, Fe2O3-MnO2-CuO or Fe2O3-MnO2-Co2O3-CuO.

34. The preparation method of the cookware with a shielding component according to any one of claims 1-6, characterized in that, The thickness of the infrared radiation layer is 0.1 - 3 μm.

35. The preparation method of the cookware with a shielding component according to any one of claims 1-6, characterized in that, The shielding member (5) is an electromagnetic shielding member.

36. The preparation method of the cookware with a shielding component according to claim 35, characterized in that, The shielding member (5) is a copper ring, an aluminum ring or a steel ring.

37. The preparation method of the cookware with a shielding component according to claim 9, characterized in that, The shielding member (5) passes through the heat insulation layer (3) and is located inside or outside the outer layer (2).

38. The preparation method of the cookware with a shielding component according to claim 9, characterized in that, When the shielding member (5) is located inside the outer layer (2), the end of the shielding member (5) is located between the heat insulation layer (3) and the bottom surface of the outer layer (2), or the end of the shielding member (5) is in contact with the outer layer (2).

39. The preparation method of the cookware with a shielding component according to any one of claims 1 to 6, characterized in that, The shielding member (5) abuts against the inner bottom of the outer layer (2), or the shielding member (5) is fixed on the inner bottom of the outer layer (2), or the shielding member (5) is located inside the outer layer (2).

40. The preparation method of the cookware with a shielding component according to claim 39, characterized in that, When the shielding member (5) is located outside the outer layer (2), the end of the shielding member (5) passes through the outer layer (2) and is exposed to the outside of the cookware.

41. A cookware with a shielding component prepared by the method according to any one of claims 1 to 40, characterized in that, It includes an inner layer (1) and an outer layer (2) connected to each other, and there is a heat insulation cavity between the inner layer (1) and the outer layer (2); The outer layer (2) is provided with at least one detection cavity (10), and at least one shielding member (5) is provided at the position corresponding to the detection cavity (10) on the inner layer (1).

42. The cookware with a shielding component according to claim 41, characterized in that, An infrared radiation layer is provided at the bottom of the inner layer (1).

43. The cookware with a shielding component according to claim 41, characterized in that, The heat insulation cavity is a cavity or a cavity provided with a heat insulation layer (3).

44. The cookware with a shielding component according to claim 41, characterized in that, The cookware is an arc-shaped pot, a square pot or a round-bottomed pot; a pot lid is provided at the top of the cookware, and a handle is provided on the pot lid.

45. The cookware with a shielding component according to any one of claims 41-44, characterized in that, A first connecting ear (4) is provided on the outer side of the inner layer (1); a limiting boss (6) is provided at a position corresponding to the first connecting ear (4) on the outer layer (2), and a connecting groove (7) is provided at the top of the limiting boss (6).

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