Heating assembly capable of detecting temperature and liquid level respectively

Abstract

The utility model relates to the technical field of heating detection, in particular to a heating assembly capable of detecting temperature and liquid level respectively, which comprises a heating piece and a heating base, the heating piece is mounted at the top of the heating base and provided with a heating surface a and a mounting surface b, and a temperature detection module and a liquid level detection module are mounted on the heating base. And the temperature detection module and the liquid level detection module are positioned on the heating base close to the mounting surface b. The temperature detection module is adopted to control the heating temperature, whether the temperature of liquid in the heated body reaches a set value or a real-time temperature can be judged through an algorithm, potential safety hazards caused by too high heating temperature are avoided, the liquid level detection module is adopted to control the remaining water amount, and the situation that the heating piece still continues to heat when the remaining water amount is insufficient can be avoided; the temperature detection module and the liquid level detection module are both arranged in the space below the heating piece, the temperature detection module and the liquid level detection module are prevented from being exposed to the outer side to affect taking, placing and using of the heated object, and user operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating detection technical field, concretely is a kind of heating assembly that can detect temperature and liquid level respectively. BACKGROUND

[0002] In daily life, electric kettle, electric rice cooker, electric cooker, slow cooker, decoction pot, electric furnace, far infrared furnace, multifunctional pot and the like are common electric heating products, among them, slow cooker, decoction pot often need long time decoction or stew, and electric kettle needs to be teabagged many times, if heating temperature is too high under the condition that user is careless, or dry burning occurs due to insufficient residual water amount, heating source can continue to conductive heating, continuous dry burning or triggering leakage can occur, which can cause user electric shock, equipment short circuit and the like, which affects user's safety and use.

[0003] In addition, the heating appliance using the detector to detect temperature or liquid level is usually installed on the outside near the heated object in structure for the convenience and improvement of detection accuracy, and the detector exposed on the outside heating space or the outside heating surface can also cause use hindrance, and the volume of the detector can also affect the user's moving track when placing and taking the heated object, so that the user is not convenient to take and use the heated object.

[0004] In view of the above shortcomings, we need to develop a heating assembly that can detect temperature and liquid level respectively to meet the use requirements of the majority of users. INVENTION CONTENTS

[0005] In view of the above-mentioned problems of the existing electric heating products that cannot effectively control temperature during heating, cannot effectively interrupt heating according to residual water amount and the detector affects taking and using, the technical scheme adopted by the utility model to solve its technical problems is:

[0006] A heating assembly that can detect temperature and liquid level respectively, comprising a heating piece that can be electrified to heat and a heating base, the heating piece is installed on the top of the heating base, the heating piece has a heating surface a located away from the heating base and a mounting surface b located close to the heating base, the circuit control board of the heating base is installed with a temperature detection module and a liquid level detection module located below the heating piece, the temperature detection module and the liquid level detection module are located outside the heating surface a of the heating base.

[0007] A heating assembly capable of detecting temperature and liquid level separately, wherein the temperature detecting module adopts an elastic extension structure, which has a fixed part installed on the heating base and an extension part extending elastically to contact the heating element, and the extension part is installed with a temperature sensor for detecting temperature; or the temperature detecting module is pasted on the heating base at a position other than the heating surface a; or the temperature detecting module is embedded in a substrate other than the conductive heating layer of the heating element.

[0008] A heating assembly capable of detecting temperature and liquid level separately, wherein the temperature sensor adopts an NTC thermistor, a thermocouple or an infrared detector.

[0009] A heating assembly capable of detecting temperature and liquid level separately, wherein the mounting surface b is provided with at least one detection mounting hole for mounting the temperature sensor, which can be a through hole structure or a blind hole structure.

[0010] A heating assembly capable of detecting temperature and liquid level separately, wherein the liquid level detecting module comprises an elastic pressing structure and a liquid level sensor, and the elastic pressing structure presses the liquid level sensor elastically so that the liquid level sensor contacts the heating element.

[0011] A heating assembly capable of detecting temperature and liquid level separately, wherein the liquid level detecting module adopts a capacitive liquid level sensor.

[0012] A heating assembly capable of detecting temperature and liquid level separately, wherein the temperature detecting module and the liquid level detecting module are assembled into an integrated structure by a splicing frame.

[0013] A heating assembly capable of detecting temperature and liquid level separately, wherein the temperature detecting module and the liquid level detecting module are respectively connected to the heating circuit of the heating assembly to control the on-off or power adjustment of the heating circuit.

[0014] A heating assembly capable of detecting temperature and liquid level separately, wherein the temperature detecting module and the liquid level detecting module are located at a position close to the mounting surface b of the heating base, the heating element comprises a substrate for placing heated objects, and the heating element is electrically connected to an external electric control device for triggering power-off protection to form a power supply circuit, so that the power supply circuit is disconnected to trigger power-off protection when the substrate is damaged.

[0015] The utility model provides a heating assembly which can detect temperature and liquid level respectively, the base material adopts fragile material, the base material is provided with conductive heating layer and conductive protective layer, the conductive protective layer includes the conductive layer which is arranged in the ring shape around the outer side of the conductive heating layer, and the heating material of the conductive heating layer adopts one of nanometer metal oxide, nanometer semiconductor metal oxide, graphene material, carbon paste material and the like to form a planar heating layer.

[0016] The utility model has the advantages that:

[0017] 1、The utility model discloses a temperature detection module is detected to the heating temperature of heating piece, and effectively controls the heating temperature, can judge whether the liquid temperature in the heated object reaches the set value or real-time temperature through the algorithm of circuit control board, avoids the security hidden danger that the heating temperature is too high leads to the occurrence, in addition, still adopts liquid level detection module to detect the residual water amount or liquid level of the heated object on the heating piece, can avoid the residual water amount when heating piece continues heating still, timely interrupt heating and avoid the dry burning phenomenon, on this basis, temperature detection module and liquid level detection module are all arranged in the space below the heating piece, avoid the influence of the taking and using of the heated object when being exposed to the outside, convenient for the user operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a kind of heating assembly of the utility model embodiment 1-3.

[0019] Figure 2 It is a kind of heating base of the utility model embodiment 1-3.

[0020] Figure 3 It is a kind of heating assembly of the utility model embodiment 4.

[0021] Figure 4 It is a kind of heating base of the utility model embodiment 4.

[0022] Figure 5 It is a kind of heating piece of the utility model embodiment 1-6.

[0023] Figure 6 It is a kind of heating base of the utility model embodiment 102.

[0024] Figure 7 It is a kind of heating piece of the utility model embodiment 701.

[0025] Figure 8 It is a kind of heating piece of the utility model embodiment 7. DETAILED DESCRIPTION

[0026] The embodiments of the utility model will be described below in detail with reference to the drawings.

[0027] Optionally, in some embodiments, the base material of the heating element 1 can be made of one of brittle materials such as glass, ceramic, stone, plastic, etc., preferably, the base material is made of glass or ceramic, the glass or ceramic has the brittle characteristic of being breakable, and the breakage caused by external force makes the conductive protective layer disconnected, which makes it easier to trigger the power-off protection after the power circuit is disconnected, wherein the glass has good light transmittance and aesthetics, and is better in ornamental value when applied to product appearance, the glass or ceramic has good resistance to most chemical substances and is not easy to be corroded, and has high hardness and is not easy to be worn out after long time use, and the glass or ceramic has low thermal expansion coefficient in high temperature state and is not easy to expand and deform.

[0028] Optionally, in some embodiments, the conductive layer 121 of the conductive protective layer 12 can be made of one of materials with good conductivity such as gold, silver, copper, aluminum, tin, etc., preferably, the conductive layer 121 is made of silver paste laid, the silver paste has high conductivity, can effectively conduct current and reduce power loss, and is easy to be formed on the surface of the base material, which is convenient for processing and production.

[0029] Embodiment 1

[0030] As Figures 1-2 And Figure 5The heating assembly capable of detecting temperature and liquid level respectively comprises a heating element 1 capable of generating heat when powered and a heating base 2, the heating element 1 is installed on the top of the heating base 2 for supporting and contacting the heated object, the heating element 1 has a heating surface a located on the side away from the heating base 2 and a mounting surface b located on the side close to the heating base 2, the heating surface a can generate heat and heat the heated object to make the heated object warm up when powered, the heating element 1 can be installed on the heating base 2 through the mounting surface b, and a temperature detection module 3 and a liquid level detection module 4 located below the heating element 1 are installed on a circuit control panel 21 of the heating base 2. The temperature detection module 3 is used for detecting the real-time temperature of the heated object when heated, the temperature detection module 3 is electrically connected to the heating circuit of the heating assembly, and when the highest temperature threshold is exceeded, the heating circuit is controlled to stop heating, and the heating temperature can also be controlled in real time during the heating process; the liquid level detection module 4 is used for detecting the real-time remaining water level in the heated object, and the water will evaporate during the heating process, so it is necessary to detect the remaining water level to avoid dry burning; the circuit control panel 21 is a control unit for controlling the temperature detection module 3 and the liquid level detection module 4 to operate, preferably a PCB board structure, which can judge whether the liquid temperature in the heated object reaches the set value or the real-time temperature through the preset algorithm of the circuit control panel 21, so as to avoid safety hazards caused by overheating; in addition, the temperature detection module 3 and the liquid level detection module 4 are installed below the heating element 1, which can hide the positions of the temperature detection module 3 and the liquid level detection module 4, so that the temperature detection module 3 and the liquid level detection module 4 do not occupy the heating space of the heating surface a and do not hinder the external space (the space moved through when the heated object is taken or placed), which is convenient for users to use, and the temperature detection module 3 and the liquid level detection module 4 are located close to the mounting surface b of the heating base 2, as close to the heating element 1 as possible, so as to guarantee sufficient temperature detection accuracy and liquid level detection accuracy.

[0031] Specifically, the temperature detection module 3 has a temperature measuring sensor 32 for detecting temperature, and the temperature measuring sensor 32 of the embodiment preferably adopts an NTC thermistor to improve the detection accuracy.

[0032] Specifically, in the embodiment, the temperature detection module 3 and the liquid level detection module 4 are respectively connected to the heating circuit of the heating assembly to control the on-off or power adjustment of the heating circuit.

[0033] As another embodiment 101 of the embodiment 1, the temperature measuring sensor 32 of the embodiment can also adopt a thermocouple to improve the detection accuracy.

[0034] As another embodiment 102 of the embodiment 1, as Figures 5-6As shown in a heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 adopts an infrared detector as a temperature measuring sensor 32, which can detect the heating temperature without contacting the heating element 1.

[0035] As another embodiment 103 of embodiment 1, the temperature detection module 3 is pasted on the heating base 2 at a position other than the heating surface a, which is more convenient for installation and more stable for detection.

[0036] Embodiment 2:

[0037] As shown in a heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 adopts an infrared detector as a temperature measuring sensor 32, which can detect the heating temperature without contacting the heating element 1. Figures 5-6 As shown in a heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 adopts an elastic extension structure 31, which has a fixed part 311 installed on the heating base 2 and an extension part 312 elastically extending to contact the heating element 1, and the extension part 312 is installed with a temperature measuring sensor 32 for detecting temperature, wherein the inside of the extension part 312 can adopt a spring or a spring sheet to achieve the effect of elastically extending the temperature measuring sensor 32. The elastic extension structure 31 can achieve the effect of elastically abutting the temperature measuring sensor 32 on the surface of the heating element 1, so as to improve the detection accuracy and enable the temperature measuring sensor 32 to elastically adapt to the installation position and use position of the heating element 1.

[0038] Embodiment 3:

[0039] As shown in a heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 adopts an elastic extension structure 31, which has a fixed part 311 installed on the heating base 2 and an extension part 312 elastically extending to contact the heating element 1, and the extension part 312 is installed with a temperature measuring sensor 32 for detecting temperature, wherein the inside of the extension part 312 can adopt a spring or a spring sheet to achieve the effect of elastically extending the temperature measuring sensor 32. The elastic extension structure 31 can achieve the effect of elastically abutting the temperature measuring sensor 32 on the surface of the heating element 1, so as to improve the detection accuracy and enable the temperature measuring sensor 32 to elastically adapt to the installation position and use position of the heating element 1. Figures 1-2 Figure 5 As shown in a heating assembly capable of detecting temperature and liquid level respectively, the liquid level detection module 4 includes an elastic pressing structure 41 and a liquid level sensor 42, the elastic pressing structure 41 elastically presses the liquid level sensor 42, so that the liquid level sensor 42 abuts and contacts the heating element 1, wherein the elastic pressing structure 41 can adopt a spring or a spring sheet to achieve the effect of elastically pressing the liquid level sensor 42. The elastic pressing structure 41 can achieve the effect of elastically pressing the liquid level sensor 42 on the surface of the heating element 1, so as to reduce the distance between the liquid level sensor 42 and the heated object, improve the detection accuracy, and enable the temperature measuring sensor 32 to elastically adapt to the installation position and use position of the heating element 1.

[0040] Specifically, the liquid level detection module 4 of the present embodiment adopts a capacitive liquid level sensor 42 to achieve the effect of detecting the change of the liquid level inside the heated object in a non-contact manner.

[0041] Embodiment 4:

[0042] As shown in a heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 adopts an elastic extension structure 31, which has a fixed part 311 installed on the heating base 2 and an extension part 312 elastically extending to contact the heating element 1, and the extension part 312 is installed with a temperature measuring sensor 32 for detecting temperature, wherein the inside of the extension part 312 can adopt a spring or a spring sheet to achieve the effect of elastically extending the temperature measuring sensor 32. The elastic extension structure 31 can achieve the effect of elastically abutting the temperature measuring sensor 32 on the surface of the heating element 1, so as to improve the detection accuracy and enable the temperature measuring sensor 32 to elastically adapt to the installation position and use position of the heating element 1. Figures 3-4 Figure 5 ​​The heating assembly capable of detecting temperature and liquid level respectively, the temperature detection module 3 and the liquid level detection module 4 are assembled into an integrated structure through the splicing frame 5, and the elastic top pressing structure 41 can simultaneously elastically press the temperature detection module 3 and the liquid level detection module 4 on the surface of the heating piece 1, so as to reduce the distance between the temperature detection module 3, the liquid level detection module 4 and the heated object, improve the detection accuracy, and make the temperature detection module 3 and the liquid level detection module 4 be able to elastically adapt to the installation position and the use position of the heating piece 1.

[0043] Embodiment 5:

[0044] As Figures 1-6 The heating assembly capable of detecting temperature and liquid level respectively, the heating piece 1 includes a base material for placing a heated object, and the heating piece 1 can be electrically connected to an external electric control device for triggering power-off protection to form a power-on circuit, so that when the base material is damaged, the power-on circuit is disconnected to trigger power-off protection.

[0045] More specifically, the heating piece 1 of the embodiment has a heating material for generating heat attached to the surface of the base material, and a conductive material for connecting external equipment, the heating material and the conductive material can be attached to the surface of the base material by physical vapor deposition (PVD), chemical vapor deposition (CVD), silk screen printing (SS), far infrared spectrum (FI) and the like, the attachment and forming area of the heating material is a heating area, and the attachment and forming area of the conductive material is a conductive area, wherein the heating area and the conductive area are not connected or overlapped, and are independent of each other, the conductive area is surrounded by the outer space of the heating area, and the conductive area is arranged between the edge of the base material surface where the heating area is located and the edge of the heating area.

[0046] In use, the heating area of ​​heating element 1 can be electrically connected to an external power supply (mains power or power supply equipment) to conduct electricity and generate heat. The conductive area of ​​heating element 1 can be electrically connected to an external electrical control device for triggering power-off protection to form a power circuit. Since the conductive material is attached to the surface of the substrate, the external electrical control device can detect the integrity of the power circuit in real time to determine whether the substrate has been damaged or broken. When the substrate is intact, the power circuit is conducting and is in normal use. When heating element 1 is damaged or broken, the conductive area is simultaneously disconnected due to the damage to the substrate, causing the power circuit to be disconnected, which can be judged as an abnormal use state. Since the conductive material is formed on the substrate by coating, bonding, screen printing or physical vapor deposition, the conductive material itself does not have toughness and ductility. Therefore, when the substrate is damaged or broken and affects the normal heating of the heating element 1, the damaged or broken part will inevitably first pass through the conductive area surrounding the heating area before entering the heating area and damaging the heating material. On this basis, the substrate is preferably made of brittle material so that it can break more thoroughly when broken to ensure that the conductive material is disconnected. Therefore, when the substrate is damaged or broken, the conductive material's attachment layer is broken. The breakage of the conductive material's attachment layer also means that the power circuit is broken. The power circuit is broken, which can immediately trigger the power-off protection mechanism of the external electrical control equipment, disconnect the circuit connected to the heating element 1 to avoid the risk of leakage. This achieves a power-off protection effect with fast response speed and high protection efficiency.

[0047] Example 6:

[0048] like Figure 5 The heating component shown can detect temperature and liquid level separately. The substrate is made of a brittle material. The substrate is provided with a conductive heating layer 11 and a conductive protective layer 12. The conductive protective layer 12 includes a conductive layer 121 arranged in a circumferential manner around the outside of the conductive heating layer 11. The heating material of the conductive heating layer 11 is formed into a planar heating layer using one of the following materials: nano-metal oxide, nano-semiconductor metal oxide, graphene material, carbon paste material, etc.

[0049] More specifically, the conductive heating layer 11 of the present embodiment includes a heating layer for electric heating and an electrode layer for connecting a power source, wherein the heating layer can adopt one of nanometer metal oxide, nanometer semiconductor metal oxide, graphene material, carbon paste material and the like to form a planar heating layer, preferably, the heating layer adopts nanometer semiconductor metal oxide as the material for conductive heating, the laying thickness of the heating layer and the laying thickness of the electrode layer are both less than 1 mm, the nanometer semiconductor metal oxide can adopt one of tin, antimony, nickel, ammonium and the like or a combination of multiple materials as nanometer particles, when being made, the nanometer semiconductor metal oxide can be attached to the surface E of the substrate by physical vapor deposition (PVD), chemical vapor deposition (CVD), silk screen printing (SS), far infrared spectrum (FI) and the like, and after high-temperature sintering, a fixed heating area is formed, at least two separate electrode layers are respectively located on both sides of the heating layer, the electrode layer includes a first electrode 1221 and a second electrode 1222, the first electrode 1221 and the second electrode 1222 are respectively arranged on both sides of the heating layer to facilitate the connection of external electric control equipment for power heating, preferably, the electrode layer can also adopt silver paste as the conductive material, the silver paste has high conductivity, can effectively conduct current and reduce power loss, and the silver paste is easy to be formed on the surface of the substrate, facilitating processing and production.

[0050] More specifically, the conductive layer 121 is an attachment path of conductive material arranged in a circumferential ring around the heating area in the form of coating, thin film or adhesion, the conductive layer 121 adopts an open ring structure, the laying thickness of the conductive layer 121 is less than 1 mm, one end of the conductive layer 121 has a first end point, the other end of the conductive layer 121 has a second end point, the first end point and the second end point are both connection ends for connecting the external electric control equipment, after being connected with the external electric control equipment, the first end point, the conductive layer 121, the second end point and the external electric control equipment form a power supply circuit, when the conductive layer 121 is disconnected due to damage or fragmentation of the substrate, the power supply circuit will be disconnected, and the disconnection of the circuit can trigger the power-off protection mechanism of the external electric control equipment.

[0051] Embodiment 7:

[0052] Different from embodiment 6, as Figure 8As shown in one kind can detect temperature and liquid level respectively, temperature detection module 3 is embedded in the base material outside the conductive heating layer 11 of heating piece 1, the base material of heating piece 1 is provided with detection mounting hole 13 for temperature detection module 3 to extend and install, the detection mounting hole 13 of the embodiment is through-hole structure, the position of detection mounting hole 13 avoids the conductive heating layer 11, to avoid affecting the heating effect of conductive heating layer 11, but the conductive heating layer 11 can leave the space of detection mounting hole 13 to meet the needs of different installation positions, the detection mounting hole 13 can better fix the installation position of temperature detection module 3, temperature detection module 3 extends and is installed in the base material of heating piece 1 in the way of inlaying, can shorten the distance between temperature detection module 3 and heating position, can improve the detection precision, reduce the detection error.

[0053] As another embodiment 701 of embodiment 7, as shown in one kind can detect temperature and liquid level respectively, detection mounting hole 13 is located at the position of mounting surface b and adopts blind hole structure, blind hole structure makes the temperature detection module 3 temperature sensor 32 not extend to heating surface a, the temperature sensor 32 of the embodiment can detect the real-time temperature of base material to control heating temperature, the detection end of temperature sensor 32 is in full contact with the base material, improves the precision of detecting the temperature of base material, also not easily be seen by user on heating surface a, has the beauty and practicability. Figure 7

[0054] The above is only with example to further illustrate the technical content of the utility model, to facilitate the reader to understand more easily, but not represent the embodiment of the utility model is limited to this, any technical extension or re-creation made according to the utility model, is protected by the utility model.The protection scope of the utility model is subject to the patent claim.​

Claims

1. A heating assembly capable of separately detecting temperature and liquid level, characterized in that: The utility model provides a heating assembly, which comprises a heating element (1) and a heating base (2), the heating element (1) is installed on the top of the heating base (2), the heating element (1) has a heating surface a on the side away from the heating base (2) and a mounting surface b on the side close to the heating base (2), a temperature detection module (3) and a liquid level detection module (4) are installed below the heating element (1) on the circuit control board (21) of the heating base (2), and the temperature detection module (3) and the liquid level detection module (4) are located outside the heating surface a of the heating base (2).

2. The heating assembly capable of detecting temperature and liquid level respectively according to claim 1, characterized in that: The temperature detection module (3) adopts an elastic extension structure (31), the elastic extension structure (31) has a fixed part (311) installed on the heating base (2) and an extension part (312) extending elastically and contacting the heating element (1), and a temperature measuring sensor (32) for detecting temperature is installed on the extension part (312); Or the temperature detection module (3) is attached to the position outside the heating surface a of the heating base (2); Or the temperature detection module (3) is embedded in the base material outside the conductive heating layer (11) of the heating element (1).

3. The heating assembly of claim 1, wherein: The temperature measuring sensor (32) of the temperature detection module (3) adopts an NTC thermistor, a thermocouple or an infrared detector.

4. The heating assembly capable of detecting temperature and liquid level respectively according to claim 2, characterized in that: The mounting surface b is provided with at least one detection mounting hole (13) for mounting the temperature measuring sensor (32), and the detection mounting hole (13) can be a through hole structure or a blind hole structure.

5. The heating assembly of claim 1, wherein: The liquid level detection module (4) comprises an elastic pressing structure (41) and a liquid level sensor (42), the elastic pressing structure (41) elastically presses the liquid level sensor (42), so that the liquid level sensor (42) abuts against and contacts the heating element (1).

6. The heating assembly of claim 5, wherein: The liquid level detection module (4) adopts a capacitive liquid level sensor (42).

7. The heating assembly of claim 5, wherein: The temperature detection module (3) and the liquid level detection module (4) are assembled into an integrated structure through a splicing frame (5).

8. The heating assembly of claim 5, wherein: The temperature detection module (3) and the liquid level detection module (4) are respectively connected to the heating circuit of the heating assembly to control the on-off or power regulation of the heating circuit.

9. The heating assembly capable of detecting temperature and liquid level respectively according to any one of claims 1-8, characterized in that: The temperature detection module (3) and the liquid level detection module (4) are located at the position of the heating base (2) close to the mounting surface b, the heating element (1) comprises a base material for placing heated objects, and the heating element (1) can be electrically connected to an external electric control device for triggering power-off protection to form an electric connection circuit, so that when the base material is damaged, the electric connection circuit is disconnected to trigger power-off protection.

10. The heating assembly capable of detecting temperature and liquid level separately according to claim 9, characterized in that: The base material adopts a brittle material, the base material is provided with a conductive heating layer (11) and a conductive protection layer (12), the conductive protection layer (12) comprises a conductive layer (121) arranged in a surrounding manner around the outer side of the conductive heating layer (11), the heating material of the conductive heating layer (11) adopts one of nanometer metal oxide, nanometer semiconductor metal oxide, graphene material and carbon paste material to form a planar heating layer.

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