Anti-foreign-body induction heating constant-temperature cup mat with lattice recognition function

Abstract

The invention belongs to the technical field of heating and heat preservation devices, and particularly relates to an anti-foreign body induction heating constant-temperature cup mat with lattice recognition, which comprises a bottom shell (1), a PCB (printed circuit board) (2) arranged in the bottom shell, a heating coil (3) arranged in the bottom shell and electrically connected with the PCB, and an upper cover (4) covering an opening of the bottom shell (1) and used for placing a to-be-heated body, the heating coil (3) is positioned below the upper cover and a gap is formed between the heating coil and the upper cover; compared with the prior art, the cup mat does not need to be heated in a heat conduction mode, no severe temperature difference exists between the cup mat and the to-be-heated body, the temperature of the cup mat does not need to be far higher than that of the to-be-heated body, and therefore the cup mat can be made of plastic and integrally formed in an injection molding mode, and material cost can be saved; and the machining cost is saved, and the machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating and temperature maintaining devices, in particular to a foreign matter prevention induction heating constant temperature cup pad with lattice recognition. BACKGROUND

[0002] The existing constant temperature heating cup pad on the market all use conduction heating to heat the water cup. The heating wire is built-in under the working surface of the cup pad mold, and the working surface of the mold shell is heated to conduct heat to the liquid in the water cup to heat the liquid. Since the conduction heating method is used, and there is a long distance between the heating point and the target to be heated. Therefore, the temperature of the heating point is much higher than the temperature of the heated object. In addition, the heating body and the heated body are physically separated, so it is not possible to install a temperature sensor on the heated object. Therefore, this heating method has the defects of being unable to accurately identify and control the temperature of the heated object. Since the temperature of the heating body must be much higher than the temperature of the heated object when using conduction heating, the surface temperature of the working surface of the traditional constant temperature heating cup pad is extremely high, and the heating surface cannot be made of traditional plastic, resulting in high production cost. Moreover, the high temperature generated by the working surface is extremely easy to cause the user to be scalded. For the above reasons, the traditional constant temperature heating cup pad cannot accurately identify the working state. Only key switches or mechanical pressure switches can be used to control the on-off state of the product. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application aims to provide a foreign matter prevention induction heating constant temperature cup pad with lattice recognition.

[0004] The technical scheme is as follows: a foreign matter prevention induction heating constant temperature cup pad with lattice recognition, comprising a bottom shell, a PCB board arranged in the bottom shell, a heating coil arranged in the bottom shell and electrically connected with the PCB board, an upper cover arranged at the opening of the bottom shell and used for placing a heated object, and the heating coil is located below the upper cover and has a gap therebetween.

[0005] Preferably, a central through hole is arranged in the heating coil, a temperature sensor is arranged on the inner bottom surface of the bottom shell and electrically connected with the PCB board and located in the central through hole; and the inner surface of the upper cover is in contact with the temperature sensor.

[0006] Preferably, the bottom shell is circular and is integrally formed by a circular bottom plate and a circular body coaxial with the bottom plate; the diameter of the circular body is smaller than the diameter of the bottom plate; and a mounting column for mounting the temperature sensor is arranged on the bottom surface of the bottom plate.

[0007] Preferably, a coil support is arranged on the bottom plate and located in the circular body; the coil support comprises two symmetrically arranged support units, and the two support units are symmetrically arranged about a diameter line of the bottom plate.

[0008] Preferably, the support unit comprises two inclined vertical plates arranged on the bottom plate, two end vertical plates arranged at one end of each of the two inclined vertical plates, and two arc-shaped vertical plates arranged between the two inclined vertical plates and connected to the two inclined vertical plates; the height of the two inclined vertical plates is flush with the height of the arc-shaped vertical plates; and the height of the end vertical plates is greater than the height of the inclined vertical plates.

[0009] Preferably, one end of each of the two inclined vertical plates is away from the inner wall of the circular body, and the two ends extend to intersect with each other; the other end of each of the two inclined vertical plates is close to the inner wall of the circular body, and the two end vertical plates are arranged at the two ends, respectively.

[0010] Preferably, the substrate of the PCB is an arc-shaped plate, and the heating coil is in the shape of a circle and coaxially arranged with the bottom plate; the PCB is located between the outer edge of the heating coil and the inner wall of the circular body; and two limiting vertical plates are arranged on the bottom plate and in contact with the two ends of the PCB for limiting the PCB.

[0011] Preferably, a notch is arranged at a corresponding position of the bottom plate and the circular body; and an edge arc-shaped vertical plate is arranged in the circular body and connected to the inner wall of the circular body on both sides of the notch in the circular body; the height of the edge arc-shaped vertical plate is greater than the height of the circular body.

[0012] Preferably, a power interface is arranged at the edge of the PCB, and a through hole is arranged in the edge arc-shaped vertical plate to accommodate the interface end of the power interface.

[0013] Preferably, the upper cover is in the shape of a circle and integrally formed by a circular cover plate and a circular ring cover coaxially arranged with the circular cover plate; an upper notch is arranged on the circular ring cover at a position corresponding to the notch in the circular body, and an arc-shaped limiting groove is arranged on the bottom surface of the circular cover plate and located inside the upper notch; and the upper end of the edge arc-shaped vertical plate is inserted into the arc-shaped limiting groove.

[0014] Preferably, a plurality of limiting plates are arranged on the inner wall on both sides of the upper notch in the upper cover, the lower end of each limiting plate is fixedly connected to the circular cover plate, the surface of each limiting plate close to the inner wall of the upper cover is an inclined surface, and the inclined surface and the inner wall of the upper cover have a fitting gap; when the upper cover is combined with the bottom shell, the upper edge of the circular body is inserted into the fitting gaps; and the circular body is located in the circular ring cover.

[0015] Preferably, the bottom shell and the upper cover are made of plastic or metal.

[0016] Technical effects: The cup mat of the application is used for heating or keeping warm the cup, tableware and the like containing drinks or food. The built-in PCB and the heating coil electrically connected with the PCB are isolated from the inner surface of the upper cover of the cup, tableware and the like to be heated, that is, there is a gap between them and they do not directly contact. Therefore, when heating, the cup, tableware and the like to be heated are not heated by the heating coil and then by the upper cover. Therefore, in the heating and keeping warm process, the cup, tableware and the like to be heated are directly inductively heated by the heating coil, and the temperature of the upper cover does not significantly rise. At the same time, the temperature sensor is arranged in the bottom shell, and the cup, tableware and the like to be heated are the heating body itself. Therefore, there is no significant temperature difference between the upper cover and the cup, tableware and the like to be heated, and the temperature of the cup, tableware and the like to be heated is conducted to the temperature sensor through the upper cover. Since there is no additional heat source interference, the data acquisition accuracy of the temperature sensor is very high, which is convenient for the built-in circuit of the PCB to accurately identify and control the cup, tableware and the like to be heated. Compared with the prior art, the cup mat of the application does not need to be heated by heat conduction, so there is no sharp temperature difference between the cup mat and the cup, tableware and the like to be heated, and the temperature of the cup mat does not have to be much higher than the temperature of the cup, tableware and the like to be heated. Therefore, the cup mat can be made of plastic and integrated by injection molding, which not only saves material cost, but also saves processing cost and improves processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the cup mat of the embodiment of the application;

[0018] Figure 2 It is another visual perspective view of the cup mat of the embodiment of the application;

[0019] Figure 3 It is a perspective view of the cup mat of the embodiment of the application after removing the upper cover;

[0020] Figure 4 It is a perspective view of the bottom shell of the embodiment of the application;

[0021] Figure 5 It is a perspective view of the upper cover of the embodiment of the application;

[0022] Figure 6 It is a circuit diagram of the embodiment of the application.

[0023] The drawings show that: the bottom shell is 1, the notch is 1a, the bottom plate is 101, the circle body is 102, the PCB is 2, the power supply interface is 201, the heating coil is 3, the center through hole is 301, the upper cover is 4, the upper notch is 4a, the circular cover plate is 401, the circular ring cover is 402, the coil support is 5, the oblique vertical plate is 501, the end vertical plate is 502, the arc vertical plate is 503, the mounting column is 6, the limiting vertical plate is 7, the edge arc vertical plate is 8, the through hole is 801, the arc limiting groove is 9, the limiting plate is 10, and the embedded gap is 10a. DETAILED DESCRIPTION

[0024] In order to make the person skilled in the art better understand the present application, the present application is further described in detail below in combination with the drawings and embodiments.

[0025] As Figures 1-3 shown, the present application provides a foreign matter prevention induction heating constant temperature cup pad with lattice recognition, which is used for heating or keeping warm the cup, tableware and the like containing drinks or food; it comprises a bottom shell 1, a PCB board 2 arranged in the bottom shell, a heating coil 3 arranged in the bottom shell and electrically connected with the PCB board, an upper cover 4 arranged at the opening of the bottom shell 1 and used for placing the body to be heated, and the heating coil 3 is located below the upper cover and has a gap therebetween, that is, the heating coil 3 is isolated from the inner surface of the upper cover 4 for placing the body to be heated (cup, tableware and the like), that is, there is a gap therebetween and they do not directly contact.

[0026] High-frequency alternating current is input to the heating coil 3, and the working surface of the heating coil 3 will generate a high-frequency alternating magnetic field. When the conductor is close to the heating coil, the alternating magnetic field will generate a rapidly changing current in the conductor due to electromagnetic induction principle. Since the conductor almost has a parasitic resistance, the alternating current will generate heat due to the parasitic resistance in the conductor. By using this heat, the purpose of heating the metal cup body can be achieved.

[0027] As Figure 3 shown, specifically, a center through hole 301 is arranged in the heating coil 3, and a temperature sensor (not shown) is arranged on the inner bottom surface of the bottom shell 1 and electrically connected with the PCB board 2 and located in the center through hole; the inner surface of the upper cover 4 is in contact with the temperature sensor, which is used for obtaining the temperature value from the body to be heated. The temperature sensor here adopts a standard commercial part.

[0028] As Figure 4 shown, specifically, the bottom shell 1 is circular and is integrally formed by a circular bottom plate 101 and a circular body 102 coaxially arranged on the bottom plate 101; the diameter of the circular body 102 is smaller than that of the bottom plate 101, so the edge of the bottom plate 101 is necessarily protruded from the connection between the bottom plate 101 and the circular body 102; the bottom surface of the bottom plate 101 is provided with a mounting column 6 for mounting the temperature sensor. Although the bottom shell 1 is circular in the embodiment, in fact, other shapes can also be adopted, such as the common square shape, which has similar effects. Since the shape of the upper cover 4 needs to correspond to the shape of the bottom shell, the upper cover 4 in the embodiment is circular, but it can also be other shapes.

[0029] As Figure 3As shown, in order to fix the heating coil 3, the bottom plate 101 is provided with a coil support 5 inside the circular body 102; the coil support comprises two symmetrically arranged support units, which are symmetric about a diameter line of the bottom plate 101, that is, symmetric about a straight line where the diameter is located. Specifically, the support unit comprises two inclined vertical plates 501 provided on the bottom plate 101, two end vertical plates 502 respectively provided at one end of the inclined vertical plates, and two arc-shaped vertical plates 503 respectively connected to the two inclined vertical plates and located between the two inclined vertical plates; the height of the two inclined vertical plates is flush with the height of the arc-shaped vertical plates; the height of the end vertical plates is greater than that of the inclined vertical plates. After the heating coil is placed on the coil support 5, the edge thereof abuts against the upper end of the end vertical plate, and the upper end of the end vertical plate here protrudes from the upper surface of the inclined vertical plate, thereby fixing the heating coil 3 and preventing it from moving.

[0030] Specifically, one end of the two inclined vertical plates 501 is away from the inner wall of the circular body 102, and the ends of the two inclined vertical plates extend to intersect after extending for a certain length; the other end of the two inclined vertical plates is close to the inner wall of the circular body, and the two end vertical plates 502 are respectively arranged at the ends; that is, the other end of the two inclined vertical plates 501 is close to the inner wall of the circular body 102, and the two end vertical plates 502 are respectively arranged at the ends of the two inclined vertical plates.

[0031] As shown in Figure 3 , the substrate of the PCB board 2 is a circular arc plate, and the heating coil 3 is in a circular shape and coaxially arranged with the bottom plate 101; after assembly, the PCB board is located between the outer edge of the heating coil and the inner wall of the circular body 102; two limiting vertical plates 7 are arranged on the bottom plate 101 and respectively contact the two ends of the PCB board to limit the PCB board. The PCB board 2 is composed of a substrate and an embedded circuit.

[0032] As shown in Figure 4 , the bottom plate 101 and the circular body 102 are respectively provided with a notch 1a at the corresponding positions; further comprising an edge arc-shaped vertical plate 8 located inside the circular body and having two ends respectively connected to the inner walls of the circular body on both sides of the notch in the circular body; the height of the edge arc-shaped vertical plate 8 is greater than the height of the circular body 102. The edge of the PCB board 2 is provided with a power interface 201, and a perforation 801 accommodating the interface end of the power interface is arranged in the edge arc-shaped vertical plate 8.

[0033] As shown in Figure 5As shown, corresponding to the shape of the bottom shell 1, the upper cover 4 is circular, which is integrally formed by a circular cover plate 401 and a circular ring cover 402 arranged coaxially with it; the circular ring cover has an upper notch 4a at a position corresponding to the notch 1a on the circular body 102, so that the power interface is exposed from the upper notch after the upper cover 4 is combined with the bottom shell 1; an arc-shaped limiting groove 9 is provided on the bottom surface of the circular cover plate, located inside the upper notch; the upper end of the edge arc-shaped upright plate 8 is inserted into the arc-shaped limiting groove, so that the upper cover 4 and the bottom shell 1 are mutually limited after being combined, preventing them from rotating relative to each other.

[0034] like Figure 5 As shown, specifically, several limiting plates 10 are provided on the inner walls on both sides of the upper notch 4a inside the upper cover 4. The lower end of each limiting plate is fixedly connected to the circular cover plate 401. The surface of the limiting plate near the inner wall of the upper cover is inclined and there is an interlocking gap 10a between the surface and the inner wall of the upper cover. When the upper cover is combined with the bottom shell 1, the upper edge of the circular body 102 is inserted into several interlocking gaps, which also helps to achieve mutual limiting after the upper cover 4 and the bottom shell 1 are combined. Specifically, the circular body is located inside the circular cover 402.

[0035] Because the temperature of the top cover 4 is relatively low during the heating or heat preservation process of the coaster in this embodiment, the bottom shell 1 and the top cover 4 are made of plastic or metal. Using plastic is not only cost-effective but also easy to process.

[0036] like Figure 6As shown, the circuit diagram of the coaster, the coaster of the present application can identify the lattice type of metal cups or tableware, and can inductively heat the metal material with such lattice type characteristics; the present application can intermittently send lattice type detection signals in a low-power standby state, that is, when the IN input detection pulse frequency is in the standby state, a short high-frequency alternating current will be generated on L1. When metal is close to the L1 coil, the metal will heat up due to the eddy current effect, and will consume energy during the heating process, so the current flowing through L1 and M1 will increase. Since the parasitic resistance of M1 is a fixed value, when the current changes, the voltage at the front end of TEST of M1 will change in direct proportion to the current of M1 due to the parasitic resistance of M1. When the TEST voltage is high, the changing voltage will be present at OUT through M2, D1, and R1. With the filtering circuit of R2 and C3, a direct current voltage proportional to the current of M1 will be output at OUT. Due to the different lattice characteristics of metals, different magnetization responses will be presented, and this magnetization response will resonate with the corresponding frequency. When the metal encounters an alternating magnetic field environment with the same resonance frequency, the induced current inside the metal will reach a maximum value, at which the metal's eddy current effect self-heating phenomenon reaches maximum power, and the energy consumed also reaches a maximum value. The current of M1 also reaches a maximum value, and the voltage of OUT also reaches a maximum value. By judging the voltage value at OUT, the metal with the corresponding lattice characteristics can be detected, so as to distinguish the material of the target object under extremely low standby power consumption, and determine whether to enter a continuous working state or continue to maintain a low-power standby state. The coaster has the function of accurately heating the cup or tableware made of target metal material and the objects inside the product shell. At the same time, it can identify all materials other than the target material and ignore them, and continue to maintain a low-power standby state, for example: when the target cup body material is set to 304 stainless steel, only the cup or tableware made of 304 stainless steel can make the coaster enter the working state and be heated. If a copper, aluminum or other material cup or tableware is mistakenly placed, it will be ignored, and the coaster will continue to maintain a low-power standby state. In this way, the constant temperature coaster will not enter the working state due to the placement of other objects. At the same time, a temperature sensor is arranged inside the shell of the working surface of the coaster. Since the heat is generated by the heated body (cup or tableware) through inductive heating, the heating body is the heated body itself, and there is no sharp temperature difference phenomenon, and heat is generated only when the cup is placed on the heating coaster. Therefore, heat can be transmitted to the temperature sensor inside the coaster through the shell of the coaster by conduction. Since there is no additional heat source interference, the data acquisition accuracy of the temperature sensor is very high. In this way, the temperature of the cup or tableware can be accurately identified and controlled. When the target reaches the set temperature, the coaster can automatically turn off the heating function, and when the temperature falls to the preset value, it can also continue to heat. In this way, the purpose of constant temperature is achieved.

[0037] In the above description, it should be noted that the terms "mounting", "connecting", "connection" and the like should be interpreted in a broad sense, for example, they can be fixed connection, detachable connection, or integral connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two components; "provided in" should be understood as "mounted, arranged", including fixed mounting, movable mounting and other mounting manners.

[0038] Obviously, the above-described embodiments are only some of the embodiments of the present application, but not all the embodiments. The preferred embodiments of the present application are shown in the drawings, but the patent scope of the present application is not limited. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A thermostatically heated cup mat with lattice recognition for preventing foreign objects, comprising a bottom shell (1), a PCB board (2) disposed within the bottom shell, a heating coil (3) disposed within the bottom shell and electrically connected to the PCB board, and a top cover (4) covering the opening of the bottom shell (1) for placing the object to be heated, characterized in that, The heating coil (3) is located below the top cover and there is a gap between them.

2. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 1, characterized in that, The heating coil (3) has a central through hole (301), and a temperature sensor that is electrically connected to the PCB board (2) and located in the central through hole is provided on the inner bottom surface of the bottom shell (1); the inner surface of the top cover (4) is in contact with the temperature sensor.

3. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 2, characterized in that, The bottom shell (1) is circular and is integrally formed from a circular bottom plate (101) and a circular body (102) coaxial with it; the diameter of the circular body is smaller than the diameter of the bottom plate; the bottom surface of the bottom plate is provided with a mounting column (6) for mounting a temperature sensor.

4. A thermostatically heated coaster with lattice recognition for preventing foreign objects, as described in claim 3, characterized in that... The base plate (101) is provided with a coil support (5) located inside the circular body (102); the coil support includes two symmetrically arranged support units, which are symmetrical about one of the diameter lines of the base plate (101).

5. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 4, characterized in that, The support unit includes two inclined vertical plates (501) on the base plate (101), two end plates (502) respectively located at one end of the inclined vertical plates, and an arc-shaped plate (503) connected to the two inclined vertical plates at both ends and located between them; the height of the two inclined vertical plates is the same as the height of the arc-shaped plate; the height of the end plate is greater than that of the inclined vertical plates.

6. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 5, characterized in that, One end of the two inclined vertical plates (501) is far away from the inner wall of the circular body (102), and the two ends can intersect after extending a certain length; the other end of the two plates is close to the inner wall of the circular body, and the two end plates (502) are respectively located at the two ends.

7. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 3, characterized in that, The substrate of the PCB board (2) is an arc-shaped plate, the heating coil (3) is circular and is coaxial with the base plate (101); the PCB board is located between the outer edge of the heating coil and the inner wall of the circular body (102); two limiting plates (7) are provided on the base plate (101) to limit the PCB board by contacting the two ends of the PCB board respectively.

8. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 3, characterized in that, The base plate (101) and the circular body (102) are each provided with a notch (1a) at corresponding positions; it also includes an edge arc-shaped upright plate (8), which is located inside the circular body, and its two ends are respectively connected to the inner wall of the circular body located on both sides of the notch of the circular body; the height of the edge arc-shaped upright plate is greater than the height of the circular body.

9. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 8, characterized in that, The PCB board (2) has a power interface (201) at its edge, and a through hole (801) for accommodating the interface end of the power interface is provided in the arc-shaped vertical plate (8) at the edge.

10. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 9, characterized in that, The upper cover (4) is circular and is integrally formed by a circular cover plate (401) and a circular ring cover (402) coaxially arranged therewith; the circular ring cover has an upper notch (4a) at a position corresponding to the notch (1a) on the circular body (102), and an arc-shaped limiting groove (9) located inside the upper notch is provided on the bottom surface of the circular cover plate; the upper end of the edge arc-shaped upright plate (8) is inserted into the arc-shaped limiting groove.

11. A thermostatically heated coaster with lattice recognition for preventing foreign objects as described in claim 10, characterized in that, Several limiting plates (10) are provided on the inner walls on both sides of the upper notch (4a) inside the upper cover (4). The lower end of each limiting plate is fixedly connected to the circular cover plate (401). The surface of the plate close to the inner wall of the upper cover is inclined and there is an interlocking gap (10a) between the surface and the inner wall of the upper cover. When the upper cover is combined with the bottom shell (1), the upper edge of the circular body (102) is inserted into several interlocking gaps. The circular body is located inside the circular cover (402).

12. A thermostatically heated coaster with lattice recognition for preventing foreign objects, as described in any one of claims 1-11, characterized in that, The bottom shell (1) and the top cover (4) are made of plastic or metal.

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