Temperature sensor and rapid temperature sensing panel using same

Abstract

The utility model discloses a temperature sensor and a rapid temperature sensing panel using the same, the temperature sensor comprises a temperature sensor body and an insulated lead fixing seat, the temperature sensor body comprises a detection head and at least two leads, the detection head is a long-strip cylindrical structure, and the leads are connected to one end of the detection head; the wire fixing seat wraps one end of the detection head and the outer side of the root of the wire, and the wires are not in contact with each other in the wire fixing seat. According to the utility model, the problem of short circuit caused by wire winding of the temperature sensor can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature detection of electromagnetic cooking appliances, in particular to a temperature sensor and a rapid temperature sensing panel using the same. Background Art

[0002] Since the electromagnetic heating technology was applied to the cooking industry, temperature control has always been a big problem. Since current electromagnetic cooking utensils usually set the temperature sensor on the bottom of the panel, due to the special principle of electromagnetic cooking utensils, the pot itself generates heat during the cooking process. Therefore, there is a panel between the temperature sensor set on the bottom of the panel and the pot, so the temperature detection of the temperature sensor has serious lag.

[0003] At present, in order to improve the sensitivity of temperature detection, a through hole or a blind hole is usually opened on the panel, and then the temperature sensor is placed in the hole to reduce the distance between the temperature sensor and the cookware. The existing temperature sensors are divided into two structures, the first of which is a cylindrical structure, and the wires are led out from both ends; the second is also a cylindrical structure, and the wires are led out from the same end. For the temperature sensor of the second structure, when it is installed on the panel, since the wires are close to each other, the wires are prone to entanglement with each other, which not only increases the difficulty of assembly, but also causes the temperature sensor to malfunction. Utility Model Content

[0004] The utility model aims to provide a temperature sensor and a rapid temperature sensing panel using the same, so as to solve the problem that the wires of the temperature sensor are easily entangled with each other due to their short distance.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A temperature sensor comprises a temperature sensor body and an insulated wire fixing seat, wherein the temperature sensor body comprises a detection head and at least two wires, the detection head is a long columnar structure, and the wires are connected to one end of the detection head; the wire fixing seat is wrapped around one end of the detection head and the outside of the root of the wire, and the wires do not contact each other in the wire fixing seat.

[0007] Preferably, the wire fixing seat is wrapped around one end of the detection head close to the wire, and each of the wires passes through a side wall of the wire fixing seat.

[0008] Preferably, an outer wall of the wire fixing seat is provided with a step at one end close to the detection head, and the wire fixing seat and the temperature sensor body are an integrally formed structure.

[0009] Preferably, the temperature sensor body is an NTC temperature sensor.

[0010] A rapid temperature sensing panel comprises a panel and a plurality of temperature sensors as described above, wherein the bottom surface of the panel is provided with a plurality of non-through holes, the temperature sensors are arranged in the non-through holes in a one-to-one correspondence, the end of the detection head is abutted against the top inner wall of the non-through hole, and the non-through hole is filled with temperature-resistant glue.

[0011] Preferably, it also includes a circuit board, which is pasted on the bottom surface of the panel, and the circuit board is provided with a plurality of clearance holes, which correspond to the non-through holes one by one, and the temperature sensor is inserted into the non-through holes through the clearance holes, and the position where the wire passes through the wire fixing seat is located on the outside of the circuit board; the wire is electrically connected to the circuit board; the outer wall of the wire fixing seat cooperates with the non-through holes and / or the clearance holes.

[0012] A rapid temperature sensing panel comprises a panel, a plurality of thermally conductive protective sheets and a plurality of temperature sensors as described above, wherein the panel is provided with a plurality of through holes, the thermally conductive protective sheets are fixed one-to-one to the tops of the through holes, the temperature sensors are arranged one-to-one in the through holes, and the top of the detection head is against the bottom surface of the thermally conductive protective sheet.

[0013] Preferably, it also includes a circuit board, which is pasted on the bottom surface of the panel, and the circuit board is provided with a plurality of clearance holes, which correspond to the through holes one by one, and the temperature sensor is inserted into the through holes through the clearance holes, and the position where the wire passes through the wire fixing seat is located on the outside of the circuit board; the wire is electrically connected to the circuit board, and the outer wall of the wire fixing seat cooperates with the through holes and / or the clearance holes.

[0014] Preferably, a limiting groove is provided at the top of the through hole, the thermally conductive protection sheet is embedded in the limiting groove, and the thermally conductive protection sheet is bonded and fixed to the limiting groove, and the top surface of the thermally conductive protection sheet is not lower than the top surface of the panel.

[0015] Preferably, the top surface of the panel is provided with a plurality of grooves, each of the grooves is provided with an annular groove, a support platform is formed in the area surrounded by the annular grooves, and the support platform is provided with the through hole;

[0016] A waterproof ring and a connecting tube are provided at the bottom of the thermally conductive protection sheet, and the waterproof ring surrounds the outside of the connecting tube; the groove, the annular groove and the through hole are filled with temperature-resistant glue, the waterproof ring is inserted into the annular groove, and the connecting tube is inserted into the through hole; the detection part of the temperature sensor is arranged inside the connecting tube.

[0017] One of the above technical solutions has the following beneficial effects:

[0018] 1. By providing a wire fixing seat, the wires of the temperature sensor can be prevented from being entangled with each other and causing a short circuit, and the efficiency of installing the temperature sensor on the panel of the electromagnetic cooking appliance can also be improved.

[0019] 2. By providing non-through holes or through holes on the panel, the distance between the temperature sensor and the cookware can be effectively reduced, thereby effectively improving the sensitivity of temperature detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a temperature sensor in one embodiment of the utility model;

[0022] Figure 2 This is a schematic structural diagram of a rapid temperature sensing panel of one embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a rapid temperature sensing panel of another embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of a rapid temperature sensing panel of another embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a rapid temperature sensing panel of another embodiment of the utility model;

[0026] In the accompanying drawings: 1-temperature sensor, 11-temperature sensor body, 111-detection head, 112-wire, 12-wire fixing seat, 121-step, 2-panel, 21-non-through hole, 22-through hole, 23-limiting groove, 24-groove, 25-annular groove, 26-support platform, 3-heat-resistant glue, 4-circuit board, 41-make way hole, 5-thermal protection sheet, 51-waterproof ring, 52-connecting pipe. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] This embodiment discloses a temperature sensor 1, such as Figure 1 As shown, it is applied to electromagnetic cooking appliances, including a temperature sensor body 11 and an insulated wire fixing seat 12, wherein the temperature sensor body 11 includes a detection head 111 and at least two wires 112, the detection head 111 is a long columnar structure, and the wire 112 is connected to one end of the detection head 111; the wire fixing seat 12 is wrapped around one end of the detection head 111 and the outside of the root of the wire 112, and each wire 112 does not contact each other in the wire fixing seat 12.

[0032] The detection head 111 of the utility model adopts a long columnar structure, such as a cylindrical or prism shape. When the temperature sensor 1 is installed on the panel 2 of the electromagnetic cooking appliance, only a hole slightly larger than the outer diameter of the detection head 111 needs to be opened on the panel 2 to vertically insert the detection head 111 into the panel 2. Therefore, the aperture of the hole opened on the panel 2 can be effectively reduced, so that the panel 2 can maintain better strength; and the wires 112 are all arranged at the same end of the detection head 111, so there will be no problem of the wires 112 being broken, and after the temperature sensor 1 is installed in the panel 2, the wires 112 are close to the opening at the bottom of the panel 2, so it is easier to lead the wires 112 out from the bottom of the panel 2. In addition, the utility model further provides a wire fixing seat 12 at one end of the detection head 111 leading out the wire 112. By providing the wire fixing seat 12, the wires 112 can be separated and isolated to prevent the wires 112 from contacting each other and causing a short circuit. Moreover, since the temperature sensor 1 has been separated by the wires 112 when it is produced, it only needs to be directly installed on the panel 2 during assembly, which can reduce the step of separating the wires 112 during assembly. It should be pointed out that since the temperature sensor 1 is small in size, the diameter of the detection head 111 is about 1 mm, and the wire 112 is only 0.1 mm-0.3 mm. mm, so the wires 112 are not only extremely thin, but also entangled together like hair, and there is a certain degree of operational difficulty in separating the wires 112. If the wires 112 need to be separated during assembly, the assembly time will be greatly increased, seriously affecting the efficiency, and there is also a probability that the wires 112 are not separated due to the operator's operating errors. However, the utility model is provided with a wire fixing seat 12, so the wires 112 are separated before installation, which not only improves the efficiency of assembly, but also effectively avoids the problem of short circuit caused by the wires 112 being entangled with each other due to assembly errors, so that the product quality can be more stable.

[0033] Furthermore, the wire fixing seat 12 is wrapped around one end of the detection head 111 close to the wire 112 , and each of the wires 112 passes through the side wall of the wire fixing seat 12 .

[0034] Each wire 112 passes through the side wall of the wire fixing seat 12, so that each wire 112 can be directed in different directions. This not only separates the wires 112 from each other and prevents them from being entangled, but also facilitates that after the temperature sensor 1 is assembled on the panel 2, each wire 112 can be accurately directed to each pad of the circuit board 4, so as to facilitate welding the wires 112 to the circuit board 4 for electrical connection.

[0035] Furthermore, a step 121 is provided on an outer wall of the wire fixing seat 12 at one end close to the detection head 111 , and the wire fixing seat 12 and the temperature sensor body 11 are an integrally formed structure.

[0036] When the temperature sensor 1 is installed on the panel 2, the step 121 of the wire fixing seat 12 can play a role of cooperating with the panel 2 to limit the position. During installation, the step 121 of the wire fixing seat 12 cooperates with the opening of the non-through hole 21 or the through hole 22 on the bottom surface of the panel 2, so that the temperature sensor 1 can be accurately installed in the panel 2; and the wire fixing seat 12 and the temperature sensor 1 adopt an integrated molding structure, which can make the connection between the wire fixing seat 12 and the temperature sensor 1 more secure.

[0037] Furthermore, the temperature sensor body 11 is an NTC temperature sensor 1 .

[0038] When the temperature of the NTC temperature sensor 1 changes, the resistance of the NTC chip inside it will also change with the temperature, and the temperature value corresponds to the resistance value one by one. Therefore, during the cooking process, when the temperature of the pot changes, the temperature of the temperature sensor 1 also changes, and the resistance also changes. By detecting the current value passing through the temperature sensor 1, the temperature currently detected by the temperature sensor 1 can be calculated.

[0039] A fast temperature sensing panel 2, as one embodiment thereof, such as Figure 2 As shown, it includes a panel 2 and several temperature sensors 1 as described above, the bottom surface of the panel 2 is provided with several non-through holes 21, the temperature sensors 1 are arranged one by one in the non-through holes 21, the end of the detection head 111 is against the top inner wall of the non-through hole 21, and the non-through hole 21 is filled with temperature-resistant glue 3.

[0040] The utility model opens a plurality of non-through holes 21 at the bottom of the panel 2 and installs the temperature sensor 1 in the non-through holes 21, thereby greatly reducing the distance between the temperature sensor 1 and the top surface of the panel 2. The temperature sensor 1 is arranged close to the top surface of the non-through holes 21, so that the temperature sensor 1 is closer to the cookware. It can be understood that when the distance between the temperature sensor 1 and the cookware is smaller, the temperature sensor 1 can sense the temperature of the cookware faster. Therefore, the deeper the non-through holes 21, the more sensitive the temperature sensing speed of the temperature sensor 1 is. In addition, such an arrangement can enable the top surface of the panel 2 to maintain a complete surface, which is easier to clean. Filling the non-through holes 21 with heat-resistant glue 3 can completely discharge the air in the non-through holes 21, thereby avoiding the influence of heat conduction efficiency due to the presence of air holes between the temperature sensor 1 and the side walls of the non-through holes 21, and further improving the sensitivity of temperature detection.

[0041] Furthermore, it also includes a circuit board 4, which is pasted on the bottom surface of the panel 2, and the circuit board 4 is provided with a plurality of clearance holes 41, and the clearance holes 41 correspond to the non-through holes 21 one by one. The temperature sensor 1 passes through the clearance holes 41 and is inserted into the non-through holes 21. The position where the wire 112 passes through the wire fixing seat 12 is located on the outside of the circuit board 4; the wire 112 is electrically connected to the circuit board 4; the outer wall of the wire fixing seat 12 cooperates with the non-through holes 21 and / or the clearance holes 41.

[0042] By arranging a circuit board 4 on the bottom surface of the panel 2, not only can the strength of the panel 2 be increased so that the panel 2 can withstand greater impact force, but also the temperature sensor 1 installed in the non-through hole 21 can be routed more conveniently. When wiring, it is only necessary to solder the wire 112 of the temperature sensor 1 to the corresponding pad of the circuit board 4, without the need to additionally arrange the wire 112, thereby making the internal wiring of the electromagnetic cooking appliance simpler.

[0043] As another example, Figure 3 As shown, the rapid temperature sensing panel 2 includes a panel 2, a plurality of thermally conductive protective sheets 5 and a plurality of temperature sensors 1 as described above, the panel 2 is provided with a plurality of through holes 22, the thermally conductive protective sheets 5 are fixed one by one to the tops of the through holes 22, the temperature sensors 1 are arranged one by one in the through holes 22, and the top of the detection head 111 is against the bottom surface of the thermally conductive protective sheet 5.

[0044] This arrangement can make the temperature sensor 1 closer to the cookware, and the thermally conductive protective sheet 5 can be made of different materials according to needs. As one implementation method, the thermally conductive protective sheet 5 can be made of metal materials, such as stainless steel, aluminum alloy or copper alloy, which not only has high thermal conductivity, but also has high strength, good ductility and wear resistance. Therefore, the thermally conductive protective sheet 5 only needs to be set as a thin sheet to protect the temperature sensor 1, and during long-term use, the thermally conductive protective sheet 5 is not easily worn due to the impact and friction of the cookware, and can have a longer service life; of course, the thermally conductive protective sheet 5 can also be made of engineering plastics, such as PEEK material, which also has good wear resistance.

[0045] Furthermore, it also includes a circuit board 4, which is pasted on the bottom surface of the panel 2, and the circuit board 4 is provided with a plurality of clearance holes 41, and the clearance holes 41 correspond to the through holes 22 one by one. The temperature sensor 1 passes through the clearance holes 41 and is inserted into the through holes 22, and the position where the wire 112 passes through the wire fixing seat 12 is located on the outside of the circuit board 4; the wire 112 is electrically connected to the circuit board 4, and the outer wall of the wire fixing seat 12 cooperates with the through holes 22 and / or the clearance holes 41.

[0046] By arranging a circuit board 4 on the bottom surface of the panel 2, not only can the strength of the panel 2 be increased so that the panel 2 can withstand greater impact force, but also the temperature sensor 1 installed in the through hole 22 can be routed more conveniently. When wiring, it is only necessary to solder the wire 112 of the temperature sensor 1 to the corresponding pad of the circuit board 4, without the need to additionally arrange the wire 112, thereby making the internal routing of the electromagnetic cooking appliance simpler.

[0047] like Figure 3 and 4 As shown, a limiting groove 23 is provided at the top of the through hole 22, and the thermal conductive protection sheet 5 is embedded in the limiting groove 23, and the thermal conductive protection sheet 5 is bonded and fixed to the limiting groove 23, and the top surface of the thermal conductive protection sheet 5 is not lower than the top surface of the panel 2.

[0048] The limiting groove 23 can limit the heat conductive protective sheet 5 in the horizontal direction, thereby preventing the heat conductive protective sheet 5 from moving in the horizontal direction due to the friction of the cookware. The heat conductive protective sheet 5 is bonded and fixed in the limiting groove 23, thereby preventing the heat conductive protective sheet 5 from falling out of the limiting groove 23. In addition, the top surface of the heat conductive protective sheet 5 is not lower than the top surface of the panel 2, thereby ensuring that the heat conductive protective sheet 5 can fully contact the cookware, thereby avoiding the air gap between the heat conductive protective sheet 5 and the cookware, resulting in the temperature of the cookware being unable to be directly transferred to the heat conductive protective sheet 5, thereby affecting the sensitivity of temperature detection. As one embodiment, Figure 3 As shown, the thermal conductive protective sheet 5 can be set to have a top surface flush with the top surface of the panel 2, so that the top surface of the panel 2 can be almost a complete plane, which is more convenient to clean; as another embodiment, as Figure 4 As shown, the thermally conductive protective sheet 5 can be arranged with a top surface higher than the top surface of the panel 2, so that the thermally conductive protective sheet 5 can support the cookware, leaving a gap between the cookware and the top surface of the panel 2, preventing the temperature of the cookware from being directly transferred to the panel 2, thereby requiring lower temperature resistance of the panel 2, and because the thermally conductive protective sheet 5 must be in contact with the cookware, the temperature sensor 1 can also inevitably detect the temperature of the cookware, avoiding the problem of being unable to detect the temperature of the cookware due to slight deformation of the cookware.

[0049] Further, as another embodiment, Figure 5 As shown, the top surface of the panel 2 is provided with a plurality of grooves 24, each of which is provided with an annular groove 25, and a support platform 26 is formed in the area surrounded by the annular grooves 25, and the support platform 26 is provided with the through hole 22;

[0050] A waterproof ring 51 and a connecting tube 52 are provided at the bottom of the thermal conductive protection sheet 5, and the waterproof ring 51 surrounds the outside of the connecting tube 52; the groove 24, the annular groove 25 and the through hole 22 are filled with temperature-resistant glue 3, the waterproof ring 51 is inserted into the annular groove 25, and the connecting tube 52 is inserted into the through hole 22; the detection part of the temperature sensor 1 is arranged inside the connecting tube 52.

[0051] By setting a groove 24 on the top surface of the panel 2 and filling the annular groove 25 and the waterproof ring 51 with heat-resistant glue 3, soup needs to first enter the annular groove 25 before it penetrates into the top of the through hole 22 from the top surface of the panel 2, then bypass the waterproof ring 51, and then pass through the top surface of the support platform 26 to reach the through hole 22. Therefore, external soup needs to pass through a longer path to penetrate into the through hole 22. In addition, the annular groove 25 is also filled with heat-resistant glue 3. Therefore, it is extremely difficult for external soup to penetrate into the through hole 22, thereby having excellent waterproof performance.

[0052] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A temperature sensor, characterized in that: It comprises a temperature sensor body and an insulated wire fixing seat, wherein the temperature sensor body comprises a detection head and at least two wires, the detection head is a long columnar structure, and the wires are connected to one end of the detection head; the wire fixing seat is wrapped around one end of the detection head and the outside of the root of the wire, and the wires do not contact each other in the wire fixing seat.

2. A temperature sensor according to claim 1, characterized in that: The wire fixing seat is wrapped around one end of the detection head close to the wire, and each of the wires passes through the side wall of the wire fixing seat respectively.

3. A temperature sensor according to claim 1, characterized in that: The outer wall of the wire fixing seat is provided with a step at one end close to the detection head, and the wire fixing seat and the temperature sensor body are an integrally formed structure.

4. A temperature sensor according to claim 1, characterized in that: The temperature sensor body is an NTC temperature sensor.

5. A rapid temperature sensing panel, characterized in that: It comprises a panel and a plurality of temperature sensors as described in any one of claims 1 to 4, wherein the bottom surface of the panel is provided with a plurality of non-through holes, the temperature sensors are arranged in the non-through holes one by one, the end of the detection head is abutted against the top inner wall of the non-through hole, and the non-through hole is filled with temperature-resistant glue.

6. A rapid temperature sensing panel according to claim 5, characterized in that: It also includes a circuit board, which is pasted on the bottom surface of the panel. The circuit board is provided with a plurality of clearance holes, which correspond to the non-through holes one by one. The temperature sensor passes through the clearance holes and is inserted into the non-through holes. The position where the wire passes through the wire fixing seat is located on the outside of the circuit board; the wire is electrically connected to the circuit board; and the outer wall of the wire fixing seat cooperates with the non-through holes and / or the clearance holes.

7. A rapid temperature sensing panel, characterized in that: It comprises a panel, a plurality of thermally conductive protective sheets and a plurality of temperature sensors as described in any one of claims 1 to 4, wherein the panel is provided with a plurality of through holes, the thermally conductive protective sheets are fixed one by one to the tops of the through holes, the temperature sensors are arranged one by one in the through holes, and the top of the detection head is against the bottom surface of the thermally conductive protective sheet.

8. A rapid temperature sensing panel according to claim 7, characterized in that: It also includes a circuit board, which is pasted on the bottom surface of the panel. The circuit board is provided with a plurality of clearance holes, which correspond to the through holes one by one. The temperature sensor passes through the clearance holes and is inserted into the through holes. The position where the wire passes through the wire fixing seat is located on the outside of the circuit board; the wire is electrically connected to the circuit board, and the outer wall of the wire fixing seat cooperates with the through holes and / or the clearance holes.

9. A rapid temperature sensing panel according to claim 8, characterized in that: A limiting groove is provided at the top of the through hole, the thermal conductive protection sheet is embedded in the limiting groove, and the thermal conductive protection sheet is bonded and fixed to the limiting groove, and the top surface of the thermal conductive protection sheet is not lower than the top surface of the panel.

10. The rapid temperature sensing panel according to claim 8, characterized in that: The top surface of the panel is provided with a plurality of grooves, each of which is provided with an annular groove, and a support platform is formed in the area surrounded by the annular grooves, and the support platform is provided with the through hole; A waterproof ring and a connecting tube are provided at the bottom of the thermally conductive protection sheet, and the waterproof ring surrounds the outside of the connecting tube; the groove, the annular groove and the through hole are filled with temperature-resistant glue, the waterproof ring is inserted into the annular groove, and the connecting tube is inserted into the through hole; the detection part of the temperature sensor is arranged inside the connecting tube.

Images