Cookware temperature measuring device and electromagnetic heating cooker

Abstract

The utility model relates to a pot temperature measuring device and an electromagnetic heating cooker, comprising a rubber pad and a probe, wherein the probe is arranged at a temperature measuring hole of a panel of the electromagnetic heating cooker in a floating manner through the rubber pad, the probe comprises a magnetic shielding shell, a thermistor, a thermal conductive adhesive layer and a filling layer, the magnetic shielding shell is provided with a temperature sensing part in contact with the pot, the interior of the magnetic shielding shell is provided with a mounting hole leading to the temperature sensing part, the thermistor is fixed to the bottom of the mounting hole through the filling layer, and is connected to the inner wall of the temperature sensing part through the thermal conductive adhesive layer, the thermistor is electrically connected to the wire through a copper pin, and the copper pin is not higher than the orifice of the mounting hole. The probe of the utility model provides a space with a stable magnetic field for the thermistor through the magnetic shielding shell, the body of the thermistor and the copper pin are both located in the space, so as to avoid the influence of the changing magnetic field on the thermistor and reduce the heating of the thermistor body by the magnetic field.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking stoves, in particular to a pot temperature measuring device and an electromagnetic heating stove. Background Art

[0002] Electromagnetic heating cookers use the principle of electromagnetic induction to control the eddy currents inside metal pots. The pots are cooked through turbine heat. Electromagnetic heating cookers are divided into induction cookers, rice cookers, electric pressure cookers, etc. according to their uses. In order to better cook, electromagnetic heating cookers will detect the temperature of the pot through the temperature detection sensor at the bottom of the pot, adjust the current of the electromagnetic coil according to the detected temperature, and control the temperature of the pot in real time.

[0003] For example, the temperature detection structure of a battery heating cooker disclosed in the Chinese utility model patent with application number 201822000102X is arranged on a panel and in contact with the bottom of the cooker. The temperature detection structure of this type is in the magnetic field generated by the electromagnetic coil. The temperature sensing probe of the temperature detection structure adopts an NTC thermistor. The iron pins of the NTC thermistor are easily magnetized by the magnetic field during the operation of the cooker, causing the iron pins to heat up. The heat of the pins is transmitted to the thermistor body, which affects the temperature measurement accuracy of the thermistor. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a cooker temperature measuring device and an electromagnetic heating cooker.

[0005] In the first aspect, the utility model provides a cookware temperature measuring device, including a rubber pad and a probe, wherein the probe is arranged at a temperature measuring hole of a panel of an electromagnetic heating cooker in a floating manner through the rubber pad, the probe includes a magnetic shielding shell, a thermistor, a thermal conductive adhesive layer and a filling layer, the magnetic shielding shell is provided with a temperature sensing part in contact with the cookware, the interior of the magnetic shielding shell is provided with a mounting hole leading to the temperature sensing part, the thermistor is fixed to the bottom of the mounting hole through the filling layer, and is connected to the inner wall of the temperature sensing part through the thermal conductive adhesive layer, the thermistor is electrically connected to the wire through a copper pin, and the copper pin is not higher than the hole opening of the mounting hole.

[0006] In some embodiments, the magnetic shielding shell is a ferrite shell.

[0007] In some embodiments, the temperature sensing portion is a copper temperature sensing portion or a ferrite temperature sensing portion.

[0008] In some embodiments, the rubber pad includes an elastic part, a supporting part and a sealing part which are arranged in sequence from the inside to the outside, the elastic part is exposed in the temperature measuring hole, the supporting part contacts the inner wall of the temperature measuring hole, the sealing part abuts against the lower surface of the panel to seal the gap between the rubber pad and the panel, the elastic part has a contact surface protruding outward, a fixing hole is provided at the highest point in the center of the contact surface, the probe is clamped and fixed in the fixing hole, and the temperature sensing part of the magnetic shielding shell is exposed at the fixing hole.

[0009] In some of the embodiments, the upper and lower openings of the fixing hole are both provided with inner steps, the two inner steps are oriented in opposite directions, a retaining ring is formed between the two inner steps, and the outer wall of the magnetic shielding shell is provided with a retaining groove, and the magnetic shielding shell is clamped in the fixing hole through the retaining ring and the retaining groove.

[0010] In some of the embodiments, a plurality of sealing ridges are concentrically arranged on the upper surface of the sealing portion, and the upper surface of the sealing portion and the sealing ridges are in contact with and connected to the lower surface of the panel.

[0011] In some embodiments, a fixing seat is provided under the rubber pad, and the rubber pad is fixed to the panel through the fixing seat. The fixing seat includes a pressure plate and a support tube. The pressure plate is located on the lower side of the sealing part, and the support tube is coaxially arranged on the inner side of the support part.

[0012] In some embodiments, the lower end of the probe extends into the cylinder cavity of the support cylinder, and the cylinder cavity of the support cylinder serves as a space for the lower end of the probe to move. A through hole connected to the cylinder cavity is opened at the lower end of the support cylinder, and the wire is routed through the through hole.

[0013] In the second aspect, the utility model also provides an electromagnetic heating cooker, comprising a panel, a base and the pot temperature measuring device described in the first aspect, wherein the panel is fixed on the base, a temperature measuring hole is provided in the center of the panel, the pot temperature measuring device is installed at the temperature measuring hole, and a probe of the pot temperature measuring device is arranged at the temperature measuring hole in a floating manner through a rubber pad.

[0014] In some embodiments, the base is provided with a raised edge at the edge of the panel, and the raised edge is higher than the upper surface of the panel.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the probe is arranged on the panel through an elastic rubber pad, so that the temperature sensing part of the probe can be close to the cookware, ensuring that the temperature of the cookware can be quickly transmitted to the thermistor inside the probe; the probe provides a space with a stable magnetic field for the thermistor through a magnetic shielding shell, and the body of the thermistor and the copper pins are located in the space, thereby avoiding the influence of the changing magnetic field on the thermistor and reducing the heating of the thermistor body by the magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the electromagnetic heating cooker according to an embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the exploded structure of the electromagnetic heating cooker according to the embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the cookware temperature measuring device according to an embodiment of the present application.

[0019] Figure 4 This is one of the cross-sectional structural schematic diagrams of the probe of the embodiment of the present application.

[0020] Figure 5 This is the second schematic diagram of the cross-sectional structure of the probe of the embodiment of the present application.

[0021] Reference numerals: 1, electromagnetic heating cooker; 11, panel; 12, base; 13, temperature measuring hole; 14, convex edge;

[0022] 2. Cookware temperature measuring device;

[0023] 3. Rubber pad; 31. Elastic part; 32. Support part; 33. Sealing part; 34. Contact surface; 35. Fixing hole; 36. Inner step; 37. Snap ring; 38. Sealing convex strip;

[0024] 4. Probe; 41. Magnetic shielding shell; 42. Temperature sensing part; 43. Mounting hole; 44. Card slot;

[0025] 5. Thermistor; 51. Main body; 52. Copper pin; 53. Wire;

[0026] 6. Fixed seat; 61. Pressing plate; 62. Support cylinder; 63. Through hole;

[0027] 7. Thermal conductive adhesive layer;

[0028] 8. Filling layer. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present utility model are introduced with reference to the accompanying drawings.

[0030] refer to Figure 1 The figure is a schematic diagram of the three-dimensional structure of the electromagnetic heating cooker 1. The electromagnetic heating cooker 1 is disc-shaped as a whole. The center of the figure is a pot temperature measuring device 2. When the pot is placed on the electromagnetic heating cooker 1, the probe 4 of the pot temperature measuring device 2 will be close to the bottom of the pot due to the gravity of the pot, and the heat of the pot will be directly transferred to the probe 4, so that the probe 4 can accurately measure the temperature of the pot.

[0031] refer to Figures 1 to 5A cookware temperature measuring device 2 includes a rubber pad 3 and a probe 4. The probe 4 is arranged at a temperature measuring hole 13 of a panel 11 of an electromagnetic heating cooker 1 in a floating manner through the rubber pad 3. The probe 4 includes a magnetic shielding shell 41, a thermistor 5, a thermal conductive adhesive layer 7 and a filling layer 8. The magnetic shielding shell 41 is provided with a temperature sensing portion 42 in contact with the cookware. The interior of the magnetic shielding shell 41 is provided with a mounting hole 43 leading to the temperature sensing portion 42. The thermistor 5 is fixed to the bottom of the mounting hole 43 through the filling layer 8 and is connected to the inner wall of the temperature sensing portion 42 through the thermal conductive adhesive layer 7. The thermistor 5 is electrically connected to a wire 53 through a copper pin 52, and the copper pin 52 is not higher than the opening of the mounting hole 43.

[0032] In the cookware temperature measuring device 2 of this embodiment, the probe 4 is arranged on the panel 11 through the elastic rubber pad 3, so that the temperature sensing part 42 of the probe 4 can be close to the cookware, ensuring that the temperature of the cookware can be quickly transmitted to the thermistor 5 inside the probe 4. The probe 4 provides a space with a stable magnetic field for the thermistor 5 through the magnetic shielding shell 41. The body 51 of the thermistor 5 and the copper pin 52 are both located in the space, avoiding the influence of the changing magnetic field on the thermistor 5 and reducing the heating of the body 51 of the thermistor 5 by the magnetic field.

[0033] It should be further explained that the thermally conductive adhesive layer 7 is thermally conductive silicone, which allows good heat transfer between the thermistor 5 and the temperature sensing portion 42. The filling layer 8 is epoxy resin, and the thermistor 5 is fixed in the mounting hole 43 by the cured epoxy resin. The thermistor 5 is encapsulated and protected by the epoxy resin. At the same time, the thermistor 5 is isolated from the outside world by the epoxy resin filling layer 8. The epoxy resin filling layer 8 has good thermal insulation performance, which reduces the temperature interference on the thermistor 5 and improves the temperature detection accuracy of the thermistor 5.

[0034] In order to improve the magnetic shielding performance of the probe 4, in this embodiment, reference Figure 3 The magnetic shielding shell 41 is a ferrite shell.

[0035] It can be understood that with such a setting, the magnetic shielding shell 41 is made of ferrite material, which has a high magnetic permeability and can effectively capture and guide the magnetic field lines, so that the magnetic field circulates inside the ferrite, so that the space of the mounting hole 43 is in a stable magnetic field environment and is not affected by changes in the external magnetic field.

[0036] In order to further improve the magnetic shielding performance of the probe 4, in this embodiment, reference Figure 4 and Figure 5 The temperature sensing portion 42 is a copper temperature sensing portion 42 or a ferrite temperature sensing portion 42 .

[0037] It should be further explained that the magnetic shielding shell 41 is formed by sintering ferrite material, and the copper temperature sensing part 42 can be sintered together with the magnetic shielding shell 41, so that the copper temperature sensing part 42 can be stably connected to the magnetic shielding shell 41. In addition to sintering, the copper temperature sensing part 42 can also be connected to the magnetic shielding shell 41 by riveting or gluing.

[0038] It is understandable that, in such a configuration, the temperature sensing portion 42 in contact with the bottom of the pot uses copper material with lower internal resistance instead of the existing commonly used aluminum temperature sensing portion 42. The copper material with lower internal resistance can further shield the magnetic field and reduce the heating of the metal sheet on the top of the probe 4 by the magnetic field, ensuring that the temperature of the temperature sensing portion 42 detected by the thermistor 5 is the temperature transmitted by the pot. In addition to the copper temperature sensing portion 42, ferrite with good thermal conductivity can also play the same role and can also reduce the interference of the magnetic field on the thermistor 5.

[0039] In order to ensure that the temperature sensing portion 42 of the probe 4 is in close contact with the cookware, in this embodiment, Figure 3 The rubber pad 3 includes an elastic portion 31, a supporting portion 32 and a sealing portion 33 which are arranged in sequence from the inside to the outside. The elastic portion 31 is exposed in the temperature measuring hole 13, the supporting portion 32 contacts the inner wall of the temperature measuring hole 13, and the sealing portion 33 abuts against the lower surface of the panel 11 to seal the gap between the rubber pad 3 and the panel 11. The elastic portion 31 has a contact surface 34 protruding outward, and a fixing hole 35 is provided at the highest point in the center of the contact surface 34. The probe 4 is clamped and fixed in the fixing hole 35, and the temperature sensing portion 42 of the magnetic shielding shell 41 is exposed at the fixing hole 35.

[0040] It can be understood that, in such a configuration, the rubber pad 3 is a silicone pad 3, and through the elasticity of the silicone pad 3 itself, the upwardly protruding elastic part 31 pushes the probe 4 upward, and the cookware placed on the panel 11 through gravity will be tightly pressed on the probe 4, so that the temperature sensing part 42 of the probe 4 is close to the cookware.

[0041] In order to ensure that the probe 4 is stably connected to the rubber pad 3, in this embodiment, reference Figure 3 The upper and lower openings of the fixing hole 35 are both provided with inner steps 36 , the two inner steps 36 are oriented in opposite directions, a snap ring 37 is formed between the two inner steps 36 , and the outer wall of the magnetic shielding shell 41 is provided with a snap groove 44 , and the magnetic shielding shell 41 is snap-connected to the fixing hole 35 through the snap ring 37 and the snap groove 44 .

[0042] It can be understood that, with such a configuration, the rubber pad 3 is clamped with the clamping groove 44 of the probe 4 through the clamping ring 37. The clamping range of the clamping ring 37 is relatively wide and is close to the temperature sensing part 42, so that the probe 4 can be stably clamped on the rubber pad 3. The two inner steps 36 of the fixing hole 35 respectively support the probe 4 in two directions to prevent the probe 4 from detaching from the rubber pad 3 by itself, thereby improving the safety of the probe 4.

[0043] In order to seal the gap between the rubber pad 3 and the panel 11, in this embodiment, Figure 2 and Figure 3 A plurality of sealing ridges 38 are concentrically arranged on the upper surface of the sealing portion 33 , and the upper surface of the sealing portion 33 and the sealing ridges 38 are in contact with and connected to the lower surface of the panel 11 .

[0044] It can be understood that, with such an arrangement, there is a gap between the inner wall of the temperature measuring hole 13 and the outer wall of the supporting portion 32, and there is a gap between the upper surface of the sealing portion 33 and the lower surface of the panel 11. The liquid on the panel 11 will enter the interior of the electromagnetic heating cooker 1 through these gaps, affecting the safety of the electromagnetic heating cooker 1. The sealing ridge 38 is integrally formed on the rubber pad 3. Through the elasticity of the rubber pad 3, the multiple circles of sealing ridges 38 on the upper surface of the sealing portion 33 can effectively seal the gap to ensure the safety of the electromagnetic heating cooker 1.

[0045] In order to fix the rubber pad 3 to the panel 11, in this embodiment, refer to Figure 3 A fixing seat 6 is arranged below the rubber pad 3 , and the rubber pad 3 is fixed to the panel 11 through the fixing seat 6 . The fixing seat 6 includes a pressing plate 61 and a supporting tube 62 . The pressing plate 61 is located at the lower side of the sealing portion 33 , and the supporting tube 62 is coaxially arranged on the inner side of the supporting portion 32 .

[0046] It can be understood that, with such a configuration, the fixing seat 6 presses the rubber pad 3 under the panel 11, and the pressure plate 61 of the fixing seat 6 presses the sealing part 33 and the lower surface of the panel 11 to seal the gap between the lower surface of the panel 11 and the upper surface of the sealing part 33. The fixing seat 6 is positioned with the rubber pad 3 through the support tube 62, and supports the support part 32 of the rubber pad 3.

[0047] In order to facilitate wiring, in this embodiment, reference Figure 3 The lower end of the probe 4 extends into the cavity of the support tube 62. The cavity of the support tube 62 serves as a space for the lower end of the probe 4 to move. A through hole 63 connected to the cavity is opened at the lower end of the support tube 62, and the wire 53 is routed through the through hole 63.

[0048] It can be understood that, with such an arrangement, the wire 53 for transmitting the signal is led out from the lower end of the probe 4 and routed through the through hole 63 at the lower end of the support tube 62, which is convenient for assembly. When the probe 4 is pressed down by the cookware, the lower end of the probe 4 needs to move downward, and the cylinder cavity of the support tube 62 can provide sufficient space for movement to ensure that the movement of the lower end of the probe 4 will not be disturbed.

[0049] The cookware temperature measuring device 2 of the embodiment of the present application forms a space with a stable magnetic field through the magnetic shielding shell 41 and the temperature sensing part 42 with magnetic shielding effect. The body 51 and the copper pin 52 of the thermistor 5 are both located in the space, thereby reducing the influence of the changing magnetic field on the thermistor 5 during the operation of the electromagnetic heating cooker 1. The probe 4 is set on the panel 11 through the elastic rubber pad 3, so that the temperature sensing part 42 of the probe 4 can be close to the cookware, ensuring that the temperature of the cookware can be quickly transmitted to the thermistor 5 inside the probe 4, thereby ensuring the accuracy of temperature measurement.

[0050] refer to Figures 1 to 5 The embodiment of the present application also provides an electromagnetic heating cooker 1, comprising a panel 11, a base 12 and a cooker temperature measuring device 2 of the first aspect, wherein the panel 11 is fixed on the base 12, a temperature measuring hole 13 is provided in the center of the panel 11, the cooker temperature measuring device 2 is installed at the temperature measuring hole 13, and a probe 4 of the cooker temperature measuring device 2 is arranged at the temperature measuring hole 13 in a floating manner through a rubber pad 3.

[0051] In order to ensure that the pot can be stably placed on the panel 11, in this embodiment, Figure 1 The base 12 is provided with a convex edge 14 at the edge of the panel 11 , and the convex edge 14 is higher than the upper surface of the panel 11 .

[0052] It can be understood that, with such a configuration, a circular groove is formed between the convex edge 14 and the panel 11. When the bottom of the pot is placed on the panel 11, the convex edge 14 will limit the position of the pot, thereby ensuring that the pot is stably and accurately placed on the panel 11, ensuring that the pot and the probe 4 can be in stable contact, and improving the accuracy of temperature detection.

[0053] The electromagnetic heating cooker 1 of the embodiment of the present application detects the temperature of the cooker in real time through the cooker temperature measuring device 2, thereby ensuring that the electromagnetic heating cooker 1 can accurately control the temperature of the cooker and improving the cooking performance of the electromagnetic heating cooker 1.

[0054] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A cookware temperature measuring device, characterized in that: It includes a rubber pad and a probe. The probe is arranged at the temperature measuring hole of the panel of the electromagnetic heating cooker in a floating manner through the rubber pad. The probe includes a magnetic shielding shell, a thermistor, a thermal conductive adhesive layer and a filling layer. The magnetic shielding shell is provided with a temperature sensing part in contact with the cookware. The interior of the magnetic shielding shell is provided with a mounting hole leading to the temperature sensing part. The thermistor is fixed to the bottom of the mounting hole through the filling layer and is connected to the inner wall of the temperature sensing part through the thermal conductive adhesive layer. The thermistor is electrically connected to the wire through a copper pin, and the copper pin is not higher than the hole opening of the mounting hole.

2. The cookware temperature measuring device according to claim 1, characterized in that: The magnetic shielding shell is a ferrite shell.

3. The cookware temperature measuring device according to claim 1, characterized in that: The temperature sensing portion is a copper temperature sensing portion or a ferrite temperature sensing portion.

4. The cookware temperature measuring device according to claim 1, characterized in that: The rubber pad includes an elastic part, a supporting part and a sealing part which are arranged in sequence from the inside to the outside, the elastic part is exposed in the temperature measuring hole, the supporting part contacts the inner wall of the temperature measuring hole, the sealing part abuts against the lower surface of the panel to seal the gap between the rubber pad and the panel, the elastic part has a contact surface protruding outward, a fixing hole is arranged at the highest point in the center of the contact surface, the probe is clamped and fixed in the fixing hole, and the temperature sensing part of the magnetic shielding shell is exposed at the fixing hole.

5. The cookware temperature measuring device according to claim 4, characterized in that: The upper and lower openings of the fixing hole are both provided with inner steps, the two inner steps are oriented in opposite directions, a snap ring is formed between the two inner steps, and the outer wall of the magnetic shielding shell is provided with a snap groove, and the magnetic shielding shell is snapped into the fixing hole through the snap ring and the snap groove.

6. The cookware temperature measuring device according to claim 4, characterized in that: A plurality of sealing convex strips are concentrically arranged on the upper surface of the sealing portion, and the upper surface of the sealing portion and the sealing convex strips are in contact with and connected to the lower surface of the panel.

7. The cookware temperature measuring device according to claim 4, characterized in that: A fixing seat is arranged below the rubber pad, and the rubber pad is fixed to the panel through the fixing seat. The fixing seat includes a pressing plate and a supporting tube. The pressing plate is located at the lower side of the sealing part, and the supporting tube is coaxially arranged inside the supporting part.

8. The cookware temperature measuring device according to claim 7, characterized in that: The lower end of the probe extends into the barrel cavity of the support barrel, and the barrel cavity of the support barrel serves as a space for the lower end of the probe to move. A through hole connected to the barrel cavity is opened at the lower end of the support barrel, and the wire is routed through the through hole.

9. An electromagnetic heating cooker, characterized in that: The invention comprises a panel, a base and the cooker temperature measuring device according to any one of claims 1 to 8, wherein the panel is fixed on the base, a temperature measuring hole is provided in the center of the panel, the cooker temperature measuring device is installed at the temperature measuring hole, and a probe of the cooker temperature measuring device is arranged at the temperature measuring hole in a floating manner through a rubber pad.

10. The electromagnetic heating cooker according to claim 9, characterized in that: The base is provided with a circle of convex edges at the edge of the panel, and the convex edges are higher than the upper surface of the panel.

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