US20250075918A1

US20250075918A1 - Recessed induction cooker with heat insulation protection pad structure and temperature detection device

Info

Publication number: US20250075918A1
Application number: US18/241,997
Authority: US
Inventors: Chia-Pin Chen; Wei-Wen Huang
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2025-03-06

Abstract

A recessed induction cooker with a heat insulation protection pad structure and a temperature detection device includes: a heat insulation protection pad, having at least one through hole; a recessed induction cooker, having a housing, a support, a coil and an arched panel; and a temperature detection module, having a temperature detector, a central processing unit and a circuit controller, wherein the temperature detector is for detecting a temperature of the arched panel to generate a temperature value, the central processing unit has a threshold unit and a comparison unit, the threshold unit pre-stores a temperature threshold, the comparison unit compares the temperature threshold with the temperature value, and the central processing unit drives the circuit controller to control the coil to stop heating when the temperature value is greater than or equal to the temperature threshold.

Description

BACKGROUND

Field of the Invention

The present invention relates to an induction cooker, and more particularly to a recessed induction cooker and a heat insulation protection pad structure thereof.

Description of Related Art

A common induction cooker heats metal by means of electromagnetic induction. Featuring advantages of having a fast heating speed and being safe and reliable, electromagnetic induction heating is extensively used in modern households. A counter top and a heating surface of an induction cooker are mostly formed of glass, so the issue of impact is easily incurred when a user places a pot thereon. In addition, during cooking, ceramic glass needs to withstand high temperatures and heat transmitted from the pot, leading to potential risks of explosion of the glass. Therefore, there is a need for a recessed induction cooker and a heat insulation protection pad structure thereof for overcoming the numerous issues above.

SUMMARY

The present invention provides a recessed induction cooker having a heat insulation protection pad structure and a temperature detection device, and aims at achieving a primary object of accurately monitoring temperatures of a pot and ceramic glass so as to prevent the glass from breaking or the pot from dry roasting.
It is another object of the present invention to prevent impact between a pot and an induction cooker from resulting poor experience of use.
To achieve the objects above, a recessed induction cooker having a heat insulation protection pad structure and a temperature detection device includes:

- a heat insulation protection pad, being a circular sheet having an arc, the heat insulation protection pad having at least one through hole;
- a recessed induction cooker, having a housing, a support, a plurality of coils and an arched panel, wherein the housing forms an inner accommodating space,
- the arched panel is a circular plate having an arch, the heat insulation protection pad is disposed on the arched panel, the arched panel is fixed at the housing;
- the support is combined at the housing and is located in the inner accommodating space; the support has a support plate, the support plate is a circular plate having an arc, the support plate has a position corresponding to that of the arched panel and is spaced by a distance, and
- the coils are combined at the support plate and face the arched panel; and
- a temperature detection module, having at least one temperature detector, a central processing unit and a circuit controller; wherein the temperature detector is disposed at the support plate and has a position aligned with that of the through hole, and the temperature detector is for detecting a temperature of the arched panel to generate a temperature value; the temperature detector is signally connected with the central processing unit, and the central processing unit has a threshold unit and a comparison unit; the threshold unit pre-stores a temperature threshold, the comparison unit compares the temperature threshold with the temperature value, and the central processing unit drives the circuit controller to control the coils to stop heating when the temperature value is greater than or equal to the temperature threshold.

Thus, it is known that the temperature detector has a position aligned with that of the through hole, so that the temperature detector is capable of detecting heat energy transmitted from a pot to the arched panel, further preventing overheating of the pot.
Moreover, the through hole is capable of preventing the heat insulation protection pad from attaching to a bottom of the pot due to air pressure, further preventing the heat insulation protection pad from also being lifted when the pot is lifted.
In addition, since the heat insulation protection pad is disposed on the arched panel, the pot does not come into direct impact with the arched panel, hence improving experience of use for a user.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a recessed induction cooker having a heat insulation protection pad and a temperature detection device of the present invention.

FIG. 2 is a section view according to a first embodiment of the present invention.

FIG. 3 is a schematic view according to the first embodiment of the present invention.

FIG. 4 is a section view according to a second embodiment of the present invention.

FIG. 5 is a schematic view according to the second embodiment of the present invention.

FIG. 6 is a schematic view of an arrangement of coils and a temperature detector according to the second embodiment of the present invention;.

FIG. 7 is a section view according to a third embodiment of the present invention.

FIG. 8 is a schematic view according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION

A recessed induction cooker having a heat insulation protection pad and a temperature detection device is provided according to a first embodiment of the present invention. Referring to FIG. 1 to FIG. 3 , the recessed induction cooker includes a heat insulation protection pad 10, a recessed induction cooker 20, and a temperature detection module 30.
The heat insulation protection pad 10 is formed of a silicon material or a plastic material and is a circular sheet having an arc. The heat insulation protection pad 10 has a top surface 10A and a bottom surface 10B opposite to each other, and has at least one through hole 11. In this embodiment, the through hole 11 is one in quantity. Preferably, the heat insulation protection pad 10 has a center position O. The center position O is located at the center of the heat insulation protection pad 10, and the through hole 11 is located at the center position O of the heat insulation protection pad 10.
The recessed induction cooker 20 has a housing 21, a support 22, a plurality of coils 23, an arched panel 25 and a coupling frame 26. The housing 21 forms an inner accommodating space 211. In this embodiment, the housing 21 has a bottom plate 212, four side plates 213 and a top plate 24, wherein one end of each of the side plates 213 is connected to the bottom plate 212.
The top plate 24 is located on one end of the housing 21. In this embodiment, the top plate 24 is combined with the other end of the side plates 213 connected to the bottom plate 212, and the top plate 24 has an accommodating hole 241.
The coupling frame 26 is annular and is formed of a stainless steel material. The coupling frame 26 has a first extension portion 261 and a second extension portion 262. The first extension portion 261 and the second extension portion 262 have different extension directions, and an included angle is formed between the first extension portion 261 and the second extension portion 262. The first extension portion 261 is combined at the top plate 24, and the second extension portion 262 extends into the accommodating hole 241. In this embodiment, the first extension portion 261 is fixed at the top plate 24 by using an adhesive, and the top plate 24 is formed of a glass material.
The arched panel 25 is a circular plate having an arch. The heat insulation protection pad 10 is disposed on the arched panel 25. The arched panel 25 has an outer periphery 251, which is combined at the second extension portion 262 by an adhesive. The arched panel 25 is formed of a glass material.
Referring to FIG. 2 , the support 22 is combined at the housing 21 and is located in the inner accommodating space 211. In this embodiment, the support 22 is combined at the side plates 213 of the housing 21. The support 22 has a support plate 221 and a connecting plate 222 joined with each other, and the connecting plate 222 is connected to the side plates 213 of the housing 21. The support plate 221 is a circular plate having an arch, and has a shape similar or identical to that of the arched panel 25. The support plate 221 has a position corresponding to that of the arched panel 25 and is spaced by a distance. Further, the support plate 221 faces the arched panel 25, and the support plate 221 is closer to the bottom plate 212 than the arched panel 25.
The coils 23 are combined at the support plate 221 of the support 22. The coils 23 face the arched panel 25, and are spaced from the arched panel 25 by a distance.
The temperature detection module 30 has at least one temperature detector 31, a central processing unit 32 and a circuit controller 33. In this embodiment, the temperature detector 31 is one in quantity. The temperature detector 31 is disposed at the support plate 221 of the support 22, and is for detecting a temperature of the arched panel 25 to generate a temperature value. The temperature detector 31 is signally connected to the central processing unit 32. The central processing unit 32 has a threshold unit 321 and a comparison unit 322 signally connected to each other. The comparison unit 322 is signally connected to the temperature detector 31 and the circuit controller 33. The threshold unit 321 pre-stores a temperature threshold. The comparison unit 322 is for comparing the temperature threshold with the temperature value. When the temperature value is greater than or equal to the temperature threshold, the central processing unit 32 drives the circuit controller 33 so that the circuit is in an open state, causing the coils 23 to stop heating. For example, specifically, the temperature detector 31 may be a thermistor, and the central processing unit 32 and the circuit controller 33 may be relay modules; however, the present invention is not limited to the examples above.
The temperature detector 31 has a position aligned with that of the through hole 11. Preferably, referring to FIG. 2 , the support plate 211 has a center portion 221A and an outer ring 221B. The center portion 221A is located at a center of the support plate 221 and is aligned with the through hole 11. The outer ring 221B is located at a circumference of the support plate 211. The outer ring 221B of the support plate 221 is connected to the connecting plate 222, and the temperature detector 31 is installed at the center portion 211A, such that the temperature detector 31 has a position aligned with that of the through hole 11.
In a second embodiment, referring to FIG. 4 to FIG. 6 , the temperature detector 31 is two in quantity, and the two temperature detectors 31 are defined to be a first temperature detector 311 and a second temperature detector 312. The through hole 11 is one in quantity. The first temperature detector 311 has a position corresponding to that of the through hole 11. A temperature detected by the first temperature detector 311 is a first temperature value, and a temperature detected by the second temperature detector 312 is a second temperature value.
Preferably, the first temperature detector 311 is disposed at the center portion 221A, and the second temperature detector 312 is disposed between the center portion 221A and the outer ring 221B and is closer to the center portion 221A.
For better description, the position of the arched panel 25 aligned with the through hole 11 is further defined to be a first detected portion 252. Since the first detected portion 252 has a position corresponding to that of the through hole 11, heat energy of a pot P disposed on the heat insulation protection pad 10 can be transmitted back to the first detected portion 252 via the through hole 11, and the first detected portion 252 has heat energy received by the arched panel 25 and heat energy transmitted back from the pot P. Thus, a temperature of the first detected portion 252 detected by the first temperature detector 311 is the first temperature value. The position of the arched panel 25 aligned with the second temperature detector 312 is a second detected portion 253. Since the second detected portion 253 is covered by the heat insulation protection pad 10 thereon, the heat energy of the pot P cannot be transmitted back to the second detected portion 253. Thus, the second detected portion 253 basically has only heat energy received by the arched panel 25, and a temperature of the second detected portion 253 detected by the second temperature detector 312 is the second temperature value.
The pre-stored temperature threshold in the threshold unit 321 is two in quantity, and the two temperature thresholds are defined to be a first temperature threshold and a second temperature threshold. The comparison unit 322 is for comparing the first temperature threshold with the first temperature value, and comparing the second temperature threshold with the second temperature value. When the first temperature value is greater than or equal to the first temperature threshold or the second temperature value is greater than or equal to the second temperature threshold, the central processing unit 32 drives the circuit controller 33 so that the circuit is in an open state, causing the coils 23 to stop heating.
Thus, it is known that, in the present invention, the first temperature value is detected by the first temperature detector 311, and the second temperature value is detected by the second temperature detector 312. The first temperature value includes the heat energy transmitted back from the pot P and the heat energy of the arched panel 25, the first temperature value is to be compared with the first temperature threshold, and the second temperature value is to be compared with the second temperature threshold, thereby adapting to various scenarios. For example, if the pot P is in a state of burning dry, the temperature of the pot P itself is significantly increased. At this point, since the heat insulation protection pad 10 separates the pot P from the arched panel 25, the second temperature value is not necessarily greater than the second temperature threshold. However, since the first temperature value includes the heat energy transmitted back from the pot P and the heat energy of the arched panel 25, the first temperature value is increased to be greater than the first temperature threshold in this case, hence causing the coils 23 to stop heating.
A recessed induction cooker having a heat insulation protection pad and a temperature detection device is provided according to a third embodiment of the present invention. Referring to FIG. 7 , the third embodiment differs from the second embodiment in the following.
The through hole 11 of the heat insulation protection pad 10 is two in quantity, and the two through holes 11 are defined to be a first through hole 111 and a second through hole 112. The first temperature detector 311 has a position corresponding to that of the first through hole 111, and the second temperature detector 312 has a position corresponding to that of the second through hole 112. The heat insulation protection pad 10 has an annular end portion 12, which is located at a circumference of the heat insulation protection pad 10. The first through hole 111 is closer to the center position O than the second through hole 112, and the second through hole 112 is closer to the annular end portion 12 than the first through hole 111. The first temperature detector 311 is closer to the center portion 221A than the second temperature detector 312, and the second temperature detector 312 is closer to the outer ring 221B than the first temperature detector 311.
Preferably, the first through hole 111 is located at the center position O of the heat insulation protection pad 10, the first temperature detector 311 is located at the center portion 221A, the second temperature detector 312 is disposed between the center portion 221A and the outer ring 221B and is closer to the center portion 221A, and the second through hole 112 is located between the center position O and the annular end portion 12 and is closer to the center position O.
For better description, the position of the arched panel 25 aligned with the through hole 111 is further defined to be a first detected portion 252, and the position of arched panel 25 aligned with the second through hole 112 is further defined to be a second detected portion 253. Thus, the heat energy of the pot P disposed on the heat insulation protection pad 10 can be transmitted back to the first detected portion 252 via the first through hole 111, and the heat energy of the pot P can be transmitted back to the second detected portion 253 via the second through hole 112. Since the first detected portion 252 and the second detected portion 253 have the heat energy received by the arched panel 25 and the heat energy transmitted back from the pot P, the temperature of the first detected portion 252 detected by the first temperature detector 311 is the first temperature value, and the temperature of the second detected portion 253 detected by the second temperature detector 312 is the second temperature value.
The pre-stored temperature threshold in the threshold unit 321 is two in quantity, and the two temperature thresholds are defined to be the first temperature threshold and the second temperature threshold. The comparison unit 322 is for comparing the first temperature threshold with the first temperature value, and comparing the second temperature threshold with the second temperature value. When the first temperature value is greater than or equal to the first temperature threshold or the second temperature value is greater than or equal to the second temperature threshold, the central processing unit 32 drives the circuit controller 33 so that the circuit is in an open state, causing the coils 23 to stop heating.
Thus, it is known that, in the present invention, the first temperature value is detected by the first temperature detector 311, and the second temperature value is detected by the second temperature detector 312. Both of the first temperature value and the second temperature value include the heat energy transmitted back from the pot P and the heat energy of the arched panel 25, the first temperature value is for comparing with the first temperature threshold and the second temperature value is for comparing with the second temperature threshold, thereby adapting to various scenarios. Referring to FIG. 7 , for example, the pot P is a pan PP. At this point, a pot bottom P1 of the pot P is closer to the second temperature detector 312 and is farther away from the first temperature detector 311. If the pot P is in a state of burning dry, the second temperature detector 312 can more accurately detect the heat energy transmitted back from the pot P, so that the second temperature value is increased to be greater than the second temperature threshold in this case, hence causing the coils 23 to stop heating further.
In a preferred embodiment, referring to FIG. 8 , the top surface 10A has a protrusion 13. The protrusion 13 protrudes from the top surface 10A, and a pot bottom P1 can be placed on the protrusion 13, so that air is allowed to pass between the pot bottom P1 and the top surface 10A.
Thus, it is known that the temperature detector 13 has a position aligned with that of the through hole 11, so that the temperature detector 13 is capable of detecting heat energy transmitted back from the pot P to the arched panel 25, further preventing overheating of the pot P.
Further, in a second embodiment of the present invention, the first temperature detector 311 has a position corresponding to that of the through hole 11, but the second temperature detector 312 is not aligned with the through hole 11. Thus, the first temperature detector 311 can together detect the temperature of the pot P, and the second temperature detector 312 is capable of detecting only the temperature of the arched panel 25 and remains unaffected by the temperature of the pot P, further enabling differentiation between overheating of the pot P and overheating of the arched panel 25.
Moreover, in the third embodiment of the present invention, the first temperature detector 311 has a position aligned with that of the first through hole 111, the second temperature detector 312 has a position aligned with that of the second through hole 112, and the second through hole 112 is farther away from the center position O than the first through hole 111. Thus, when the pot P is the pan PP, the pot bottom P1 is closer to the second temperature detector 312 and farther away from the first temperature detector 311, hence enabling the second temperature detector 312 to detect overheating of the pan PP.
Moreover, the through hole 11 is capable of preventing the heat insulation protection pad 10 from attaching to the pot bottom P1 of the pot P due to air pressure, further preventing the heat insulation protection pad 10 from also being lifted when the pot P is lifted.
In addition, the top plate 24 and the arched panel 25 are formed of different glass materials and cannot be easily bonded to each other. Thus, by bonding the top plate 24 with the first extension portion 261 and bonding the arched panel 25 with the second extension portion 262, the arched panel 25 is secured at the top plate 24.
Further, another function of the heat insulation protection pad 10 of the present invention is that, once cooking is done, hands of a user are prevented from risks of getting burned or the user is prevented from being startled by high temperatures if the hands of the user accidentally come into contact with the arched panel 25.

Claims

What is claimed is:

1. A recessed induction cooker having a heat insulation protection pad structure and a temperature detection device, comprising:

a heat insulation protection pad, being a circular sheet having an arc, the heat insulation protection pad having at least one through hole;

a recessed induction cooker, having a housing, a support, a plurality of coils and an arched panel; wherein the housing forms an inner accommodating space, the arched panel is a circular plate having an arch, and the heat insulation protection pad is disposed on the arched panel; the arched panel is fixed at the housing, the support is combined at the housing and is located in the inner accommodating space; the support has a support plate, the support plate is a circular plate having an arc, the support plate has a position corresponding to that of the arched panel and spaced by a distance, and the coils are combined at the support plate and face the arched panel; and

a temperature detection module, having at least one temperature detector, a central processing unit and a circuit controller; wherein the temperature detector is disposed at the support plate and has a position aligned with that of the through hole, and the temperature detector is for detecting a temperature of the arched panel to generate a temperature value; the temperature detector is signally connected with the central processing unit, and the central processing unit has a threshold unit and a comparison unit signally connected to each other; the comparison unit is signally connected with the temperature detector and the circuit controller, the threshold unit pre-stores a temperature threshold, the comparison circuit is for comparing the temperature threshold with the temperature value, and the central processing unit drives the circuit controller to control the coils to stop heating when the temperature value is greater than or equal to the temperature threshold.

2. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the through hole is one in quantity, and the temperature detector is one in quantity.

3. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the heat insulation protection pad has a center position, the center position is located at a center of the heat insulation protection pad, and the through hole is located at the center position; the support plate has a center portion, the center portion is located at a center of the support plate, the center portion is aligned with the through hole, and the temperature detector is installed at the center portion.

4. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the housing has a top plate, and the top plate is located on one end of the housing, has an accommodating hole and is formed of a glass material; the recessed induction cooker further comprising coupling frame, the coupling frame being annular and having a first extension portion and a second extension portion, wherein the first extension portion and the second extension portion have different extension directions, the first extension portion is combined at the top plate, the second extension portion extends into the accommodating hole, and the first extension portion is fixed at the top plate by using an adhesive; the arched panel is formed of a glass material and has an outer periphery, and the outer periphery of the arched panel is combined at the second extension portion by using an adhesive.

5. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 4, wherein the housing has a bottom plate and four side plates, one end of each of the side plates is connected to the bottom plate, and the top plate is combined to one other end of the bottom plate connected to the side plates; the support is combined at the side plates of the housing, the support has a connecting plate joined with the support plate, and the connecting plate is connected to the side plates of the housing.

6. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the heat insulation protection pad is formed of a silicon material or a plastic material.

7. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the through hole is one in quantity; the temperature detector is two in quantity, the two temperature detectors are defined to be a first temperature detector and a second temperature detector, the first temperature detector has a position aligned with that of the through hole, a temperature detected by the first temperature detector is a first temperature value, and a temperature detected by the second temperature detector is a second temperature value; the pre-stored temperature threshold in the threshold unit is two in quantity, the two temperature thresholds are defined to be a first temperature threshold and a second temperature threshold; the comparison unit is for comparing the first temperature threshold with the first temperature value, and comparing the second temperature threshold with the second temperature value; and when the first temperature value is greater than or equal to the first temperature threshold or the second temperature value is greater than or equal to the second temperature threshold, the central processing unit drives the circuit controller to control the coils to stop heating.

8. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 7, wherein the support plate has a center portion, and the first temperature detector is closer to the center portion than the second temperature detector.

9. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 7, wherein the support plate has a center portion and an outer ring, the center portion is located at a center of the support plate and is aligned with the through hole, and the outer ring is located at a circumference of the support plate; the temperature detector is installed at the center portion, and the temperature detector has a position aligned with that of the through hole; the first temperature detector is disposed at the center portion, and the second temperature detector is disposed between the center portion and the outer ring.

10. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 1, wherein the through hole is two in quantity, and the two through holes are defined to be a first through hole and a second through hole; the temperature detector is two in quantity, the two temperature detectors are defined to be a first temperature detector and a second temperature detector; the first temperature detector has a position aligned with that of the first through hole, and the second temperature detector has a position aligned with that of the second through hole; the heat insulation protection pad has a center position, the center position is located at a center of the heat insulation protection pad, the first through hole is closer to the center position than the second through hole, and the second through hole is farther away from the center position than the first through hole; the support plate has a center portion, the center portion is located at a center of the support plate, the first temperature detector is closer to the center portion than the second temperature detector, and the second temperature detector is farther away from the center portion than the first temperature detector; and the pre-stored temperature threshold in the threshold unit is two in quantity, the two temperature thresholds are defined to be a first temperature threshold and a second temperature threshold; the comparison unit is for comparing the first temperature threshold with the first temperature value, and comparing the second temperature threshold with the second temperature value; and when the first temperature value is greater than or equal to the first temperature threshold or the second temperature value is greater than or equal to the second temperature threshold, the central processing unit drives the circuit controller to control the coils to stop heating.

11. The recessed induction cooker having the heat insulation protection pad structure and the temperature detection device according to claim 10, wherein the first through hole is located at a center position of the heat insulation protection pad, the first temperature detector is located at the center portion, the second temperature detector is disposed between the center portion and the outer ring, and the second through hole is located between the center position and the annular end portion.