Induction cooker surface detection NTC temperature sensor

Abstract

The utility model provides an induction cooker surface detection NTC temperature sensor which comprises an NTC thermistor, a shell is arranged on the outer side of the NTC thermistor, a mounting base is arranged at the outer end of the shell, the right end of the NTC thermistor is connected with two sets of wires through two sets of leads, and wrapping copper strips are arranged at the joints of the two sets of wires and the NTC thermistor. A PVDF heat shrink tube is arranged on the right side of the wrapping copper strip, the right end of the wire is connected with two sets of crimping terminals, plastic bodies are arranged outside the two sets of crimping terminals, a water-drop-shaped NTC thermistor is adopted to be packaged through a certain technology, the temperature sensor is manufactured, and the temperature sensor is installed below a furnace surface to dynamically feed back the temperature of the furnace surface and is used for accurately detecting the temperature of the furnace surface. And normal operation is realized. The sensor has the main technical characteristics that the sensor must accurately measure the temperature, is sensitive in response, and can safely and reliably work in a high-temperature, high-humidity and cold-heat alternating environment for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature sensors, in particular to an NTC temperature sensor for detecting the surface of an induction cooker. Background Art

[0002] Induction cooker, also known as electromagnetic stove, is the product of modern kitchen revolution. It does not need open flame or conduction heating but allows heat to be generated directly at the bottom of the pot, so the thermal efficiency has been greatly improved. It is a highly efficient and energy-saving kitchenware, which is completely different from all traditional kitchenware with or without fire conduction heating. Induction cooker is an electrical cooking appliance made by electromagnetic induction heating principle. It consists of high-frequency induction heating coil (i.e. excitation coil), high-frequency power conversion device, controller and ferromagnetic material bottom cookware. When in use, alternating current is passed through the heating coil, and an alternating magnetic field is generated around the coil. Most of the magnetic lines of the alternating magnetic field pass through the metal pot body, generating a large amount of eddy current in the bottom of the pot, thereby generating the heat required for cooking. There is no open flame during the heating process, so it is safe and hygienic.

[0003] The induction cooker was born in Germany in 1957. It was produced in the United States in the 1970s. In the early 1980s, it became popular in Europe, America and Japan. In the late 1990s, it was gradually introduced to my country. Because of its small size, dexterity, hygiene, easy to move, easy to carry and complete functions, it can steam, boil, fry, bake, deep-fry, stew, shabu-shabu, and timer insulation. It is equivalent to 9 kinds of small kitchen appliances. That is: electric frying pan, milk pan, electric rice cooker, electric hot pot, electric kettle, electric baking pan, electric baking tray, egg cooker, electric stew pot. It is suitable for various places: especially fire-prohibited places (such as basements, gas stations, liquefied centers, tobacco and alcohol factories, warehouses, etc.) because it does not produce open flames and high temperatures when it is powered on. Therefore, the use of induction cookers will become more and more widespread, and the market prospects are very broad.

[0004] Traditional induction cookers usually install diode-type NTC thermistors directly under the oven surface to detect the oven surface temperature. However, the exposed NTC thermistors are at risk of failure when used for a long time in high temperature, low temperature and sometimes humid environments, which poses a great hidden danger to the safety of the induction cooker. In order to eliminate this safety hazard, it is necessary to provide an induction cooker surface detection NTC temperature sensor to solve the above problem. Utility Model Content

[0005] The technical content of the utility model is to provide an NTC temperature sensor for detecting the surface of an induction cooker.

[0006] In order to solve the above problems, the utility model provides an NTC temperature sensor for detecting the surface of an induction cooker, comprising: an NTC thermistor, a shell is arranged on the outside of the NTC thermistor, a mounting seat is arranged on the outer end of the shell, the right end of the NTC thermistor is connected with two groups of wires through two groups of lead wires, a wrapped copper belt is arranged at the connection between the two groups of wires and the NTC thermistor, a PVDF heat shrink tube is arranged on the right side of the wrapped copper belt, the right end of the wire is connected with two groups of crimping terminals, and a plastic body is arranged outside the two groups of crimping terminals.

[0007] As a further solution of the utility model, the NTC thermistor is configured as a water drop-shaped glass-sealed type, and the NTC thermistor glass shell is closely attached to the bottom of the shell, which can enhance the sensing effect.

[0008] As a further solution of the present invention, the shell is made of ceramic material to ensure the perception stability.

[0009] As a further solution of the utility model, the interior of the shell is encapsulated with high temperature resistant potting glue to protect the NTC thermistor.

[0010] As a further solution of the present invention, the mounting seat is made of silicone material, and two sets of limiting rings are provided at the right end of the mounting seat to facilitate the installation of the mounting seat.

[0011] As a further solution of the utility model, two groups of lead sleeves at the right end of the NTC thermistor are provided with two groups of first insulating tubes, and the outer ends of the two groups of wires are provided with second insulating tubes, which can effectively insulate.

[0012] As a further solution of the present invention, the wire, the first insulating tube and the second insulating tube are all made of Teflon material, which can effectively insulate.

[0013] In summary, the utility model includes at least one of the following beneficial technical effects:

[0014] First, the utility model records an electrostatic powder spraying device for metal workpieces, which records that a temperature sensor is made by using a water drop-shaped NTC thermistor through a certain process packaging, and is installed under the furnace surface to dynamically feedback the temperature of the furnace surface, so as to accurately detect the temperature of the furnace surface and achieve normal operation. The main technical characteristics are: the sensor must accurately measure temperature, be sensitive to reaction, and be able to work safely and reliably in a high temperature, high humidity, and alternating hot and cold environment for a long time.

[0015] Second, the utility model records an electrostatic powder spraying device for metal workpieces, which records that a water drop-shaped glass-sealed NTC thermistor is made by adding Teflon insulation tubes to the two leads, encapsulating it into a ceramic shell with high-temperature potting glue, and connecting the high-temperature Teflon wire with a copper tape to make an NTC temperature sensor, and then installing the NTC temperature sensor into a silicone seat for easy installation. The water drop-shaped NTC thermistor glass shell is close to the ceramic shell, and the ceramic shell is close to the furnace surface, which can quickly sense the furnace surface temperature, solving the defect of slow response speed of the NTC thermistor after encapsulation;

[0016] Third, the utility model records an electrostatic powder spraying device for metal workpieces, which records that the conductive wire, the first insulating tube and the second insulating tube are all set to Teflon material. The Teflon material can withstand extreme temperature conditions and can usually be used for a long time in the temperature range of -80°C to +200°C, which ensures that the NTC thermistor can work stably in various temperature environments. Teflon has excellent chemical inertness, which means that it is not easy to react with other chemicals, which is particularly important for protecting the lead wires, because chemical corrosion of the wires can be avoided in complex environments. Teflon is an excellent insulating material with excellent electrical insulation properties. Therefore, when used as an insulating tube, it can effectively prevent electrical short circuits between wires and between wires and possible external conductive materials. Teflon material is wear-resistant and anti-aging, which means that the insulating tube is not easy to wear or age even after long-term use, thereby extending its service life and maintaining its insulation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the NTC temperature sensor for detecting the surface of an induction cooker according to the utility model;

[0019] Figure 2 This is a schematic diagram of the disassembled three-dimensional structure of the NTC temperature sensor for detecting the surface of an induction cooker according to the utility model;

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the NTC temperature sensor for detecting the surface of an induction cooker according to the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the NTC temperature sensor for detecting the surface of the induction cooker of the utility model;

[0022] Figure 5 This is a schematic diagram of the partially disassembled structure of the NTC temperature sensor for detecting the surface of an induction cooker according to the utility model.

[0023] Figure numerals: 1. NTC thermistor; 2. Ceramic housing; 3. High temperature resistant potting glue; 4. Mounting seat; 5. Wire; 6. First insulating tube; 7. Wrapped copper tape; 8. PVDF heat shrink tube; 9. Second insulating tube; 10. Crimp terminal; 11. Plastic body. DETAILED DESCRIPTION

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The NTC temperature sensor for detecting the surface of an induction cooker comprises: an NTC thermistor 1, a housing 2 is arranged outside the NTC thermistor 1, a mounting seat 4 is arranged at the outer end of the housing 2, the right end of the NTC thermistor 1 is connected with two groups of wires 5 through two groups of lead wires, a wrapped copper belt 7 is arranged at the connection between the two groups of wires 5 and the NTC thermistor 1, and a PVDF heat shrink tube 8 is arranged on the right side of the wrapped copper belt 7, and the right end of the wire 5 is connected with two groups of crimping terminals 10, and a plastic body 11 is arranged outside the two groups of crimping terminals 10.

[0025] The NTC thermistor 1 is configured as a water drop-shaped glass-sealed type, and the glass shell of the NTC thermistor 1 is closely attached to the bottom of the housing 2 .

[0026] The housing 2 is made of ceramic material. The ceramic housing 2 can keep the resistance value of the NTC thermistor 1 stable in the air. Since the ceramic material is less sensitive to environmental factors such as oxygen, the ceramic housing 2 helps to maintain the high sensitivity of the NTC thermistor 1, which is crucial for applications such as temperature measurement and temperature compensation.

[0027] The inside of the housing 2 is encapsulated with a high temperature resistant potting compound 3, which can provide physical protection for the NTC thermistor 1 to prevent damage to it from the external environment. This protection is particularly important because the NTC thermistor 1 is usually used to measure temperature, and the measuring point may be exposed to a harsh environment. The high temperature resistant potting compound can maintain a low shrinkage rate after curing, which means that it has little dimensional change during the thermal cycle, which helps to maintain the stability and accuracy of the NTC thermistor 1. Since the silicone potting compound has good thermal conductivity, it can help heat be transferred to the temperature sensing part of the NTC thermistor 1 more directly and quickly, thereby improving the response speed and measurement accuracy of the sensor.

[0028] The mounting base 4 is configured to be made of silicone material, and two sets of limit rings are provided at the right end of the mounting base 4. The silicone material can withstand a wider temperature range, which means that the heat generated when the NTC thermistor 1 is working will not damage the mounting base 4, ensuring the stable operation of the equipment. Silicone has good weather resistance and will not degrade or be damaged due to long-term use or exposure to harsh environments, thereby increasing its service life. The two sets of limit rings can facilitate the installation of the mounting base 4 in a suitable position.

[0029] Two groups of lead sleeves at the right end of the NTC thermistor 1 are provided with two groups of first insulating tubes 6, and the outer ends of the two groups of wires 5 are provided with second insulating tubes 9. The wires 5, the first insulating tubes 6 and the second insulating tubes 9 are all made of Teflon material. Teflon material can withstand extreme temperature conditions and can usually be used for a long time in the temperature range of -80°C to +200°C, which ensures that the NTC thermistor 1 can work stably in various temperature environments. Teflon has excellent chemical inertness, which means that it is not easy to react with other chemicals, which is particularly important for protecting the leads because chemical corrosion of the wires 5 can be avoided in complex environments. Teflon is an excellent insulating material with excellent electrical insulation properties. Therefore, when used as an insulating tube, it can effectively prevent electrical short circuits between the wires 5 and between the wires 5 and possible external conductive materials. Teflon material is wear-resistant and anti-aging, which means that the insulating tube is not easy to wear or age even after long-term use, thereby extending its service life and maintaining its insulation properties.

[0030] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. The NTC temperature sensor for detecting the surface of the induction cooker is characterized by: include: An NTC thermistor (1), wherein a housing (2) is arranged outside the NTC thermistor (1), a mounting seat (4) is arranged at the outer end of the housing (2), the right end of the NTC thermistor (1) is connected to two groups of wires (5) via two groups of lead wires, a wrapped copper strip (7) is arranged at the connection between the two groups of wires (5) and the NTC thermistor (1), a PVDF heat shrink tube (8) is arranged on the right side of the wrapped copper strip (7), the right end of the wire (5) is connected to two groups of crimping terminals (10), and a plastic body (11) is arranged outside the two groups of crimping terminals (10).

2. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 1, characterized in that: The NTC thermistor (1) is configured as a water drop-shaped glass-sealed type, and the glass shell of the NTC thermistor (1) is tightly attached to the bottom of the housing (2).

3. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 1, characterized in that: The housing (2) is made of ceramic material.

4. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 1, characterized in that: The interior of the shell (2) is sealed with a high temperature resistant potting glue (3).

5. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 1, characterized in that: The mounting seat (4) is made of a silicone material, and two sets of limiting rings are arranged at the right end of the mounting seat (4).

6. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 1, characterized in that: Two sets of lead wires at the right end of the NTC thermistor (1) are sheathed with two sets of first insulating tubes (6), and the outer ends of the two sets of wires (5) are sheathed with second insulating tubes (9).

7. The NTC temperature sensor for detecting the surface of an induction cooker according to claim 6, characterized in that: The wire (5), the first insulating tube (6) and the second insulating tube (9) are all made of Teflon material.

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