CN215217867U

CN215217867U - Temperature sensing detection structure and cooking utensil

Info

Publication number: CN215217867U
Application number: CN202121012697.6U
Authority: CN
Inventors: 吴津宁; 杨广良; 周旋
Original assignee: Guangdong Enaiter Electrical Appliances Co Ltd
Current assignee: Guangdong Enaiter Electrical Appliances Co Ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-17
Anticipated expiration: 2031-05-12

Abstract

The utility model discloses a temperature sensing detects structure and cooking utensil, wherein, temperature sensing detects the structure and includes: a cover plate; temperature sensor, including insulating installation cap, temperature sensing structure, wire and at least one deck insulation support, one side of apron and continuous with the apron are located to insulating installation cap, and the temperature sensing structure is inserted and is located the inner chamber of insulating installation cap, and the temperature sensing structure is formed with two wiring ends, and two wiring ends are connected with a wire respectively, and the wire is located to the insulation support cover and stretch into to insulating installation cap in, and the inboard packing of insulating installation cap is provided with insulating fixed glue film. The insulating sheath of installing cap, insulating fixed glue film, insulation support and wire can form the insulating protection of multilayer, and the heart yearn in thermistor and the temperature sensor has the insulating protection of multilayer, can make temperature sensor have good insulating properties, can need not set up the earth connection.

Description

Temperature sensing detection structure and cooking utensil

Technical Field

The utility model relates to a household electrical appliances technical field, in particular to temperature sensing detects structure and cooking utensil.

Background

For some cooking appliances, it is generally necessary to provide a temperature detection structure to detect the temperature. Generally, the temperature detection structure adopts a thermistor, the thermistor has different resistance values along with the change of temperature, and the temperature of the environment where the temperature detection structure is located can be converted by detecting the resistance value change of the thermistor. However, some existing temperature detection structures have poor insulating performance, and have the condition of electric leakage caused by insufficient insulating strength in the long-term use process, so that the safety is low; some electrical apparatus are provided with ground protection structure, and the temperature detects the structure and corresponds the electric wire that is equipped with connection ground protection structure, and when the temperature detected the structure and takes place the electric leakage, the ground protection structure circular telegram of electrical apparatus probably can make electrical apparatus break down, has shortened the life of electrical apparatus.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a temperature sensing and detect structure, it can have better insulating properties.

The utility model discloses still provide the cooking utensil who has above-mentioned temperature sensing and detect the structure.

In order to solve the above problem, the utility model provides a temperature sensing detects structure, it includes: a cover plate; the temperature sensor comprises an insulating mounting cap, a temperature sensing structure, a wire and at least one layer of insulating sleeve, wherein the insulating mounting cap is arranged on one side of the cover plate and is connected with the cover plate, the temperature sensing structure is inserted into an inner cavity of the insulating mounting cap, two wiring ends are formed on the temperature sensing structure and are respectively connected with the wire, the wire is sleeved with the insulating sleeve and extends into the insulating mounting cap, and an insulating fixing glue layer is filled in the inner side of the insulating mounting cap.

According to some embodiments, the temperature sensing structure includes a lead wire and a thermistor connected to each other, and the thermistor is located on a side of the inner cavity of the insulative mounting cap close to the cover plate.

According to some embodiments, a plug key is inserted into the insulating mounting cap, the end of the thermistor abuts against the end of the plug key, the plug key has two notches, and the two terminals are respectively arranged in the two notches.

According to some embodiments, a shielding film is attached to one side of the cover plate, so that the insulative mounting cap is positioned between the cover plate and the shielding film.

According to some embodiments, a first adhesive layer is provided between the cover plate and the insulative mounting cap.

According to some embodiments, a section of the outer wall of the insulating mounting cap opposite to the temperature sensing structure is attached to the cover plate.

According to some embodiments, one side of the cover plate has a mounting groove, and the temperature sensor is disposed in the mounting groove.

According to some embodiments, one end of the insulating mounting cap is provided with a step part, the step part is sleeved with a rubber sleeve, and the end part of the rubber sleeve and the other end of the insulating mounting cap are respectively abutted against two opposite inner side walls of the mounting groove.

According to some embodiments, the cover plate has a through hole, and the outer sidewall of the insulative mounting cap has a protrusion above the temperature sensing structure, the protrusion being located in the through hole.

According to some embodiments, a sealing ring is provided between the protrusion and an inner sidewall of the through hole.

The utility model also provides a cooking utensil, it includes temperature sensing detect the structure.

The scheme has at least one of the following beneficial effects: the insulating sheath of installing cap, insulating fixed glue film, insulation support and wire can form the insulating protection of multilayer, and the heart yearn in thermistor and the temperature sensor has the insulating protection of multilayer, can make temperature sensor have good insulating properties, can need not set up the earth connection.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a cross-sectional view of a first embodiment of a temperature sensing arrangement;

FIG. 2 is a cross-sectional view of the temperature sensor shown in FIG. 1;

FIG. 3 is a cross-sectional view of a second embodiment of a temperature sensing arrangement;

FIG. 4 is a cross-sectional view of a third embodiment of a temperature sensing arrangement;

FIG. 5 is a cross-sectional view of one embodiment of an insulative mounting cap;

FIG. 6 is a cross-sectional view of the first embodiment of the stopper key;

FIG. 7 is a cross-sectional view of a second embodiment of a stopper key;

fig. 8 is a cross-sectional view of a third embodiment of a stopper key.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper and lower directions, is the orientation or positional relationship shown on the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A cooking appliance includes a body, a lid 10 and a temperature sensing and detecting structure. The machine body is provided with a cooking cavity capable of accommodating a pot, the cover body 10 is arranged at the opening of the cooking cavity, and the temperature sensing and detecting structure is arranged at one side of the cover body 10 close to the cooking cavity. Wherein, the cooking utensil can be set as a rice cooker, an electric pressure cooker, an electric stewpan, a pancake machine and the like.

Referring to fig. 1 and 2, a first embodiment of a temperature sensing structure includes a cover plate 10 and a temperature sensor 20, wherein the temperature sensor 20 includes an insulative mounting cap 21, a temperature sensing structure 22, a wire 23, and an insulative bushing 26. The insulating mounting cap 21 is arranged on one side of the cover plate 10 and connected with the cover plate 10, the temperature sensing structure 22 is inserted into an inner cavity of the insulating mounting cap 21, two wiring terminals 223 are formed on the temperature sensing structure 22, each wiring terminal 223 is connected with a wire 23, the wires 23 are led out of the insulating mounting cap 21, the insulating sleeve 26 is sleeved on the insulating sleeve 26, the insulating sleeve 26 extends into the insulating mounting cap 21, and an insulating fixing glue layer 24 is filled on the inner side of the insulating mounting cap 21. The insulating sleeve 26 is provided in at least one layer, and for example, the insulating sleeve 26 may be provided in two layers. The temperature sensing structure 22 comprises a lead 221 and a thermistor 222 which are connected, the temperature sensing structure 22 is bent into a U shape, and the thermistor 222 is positioned on one side of the inner cavity of the insulating mounting cap 21 close to the cover plate 10.

During production, the insulating mounting cap 21 is filled with liquid insulating fixing glue, and the insulating fixing glue layer 24 is formed after the insulating fixing glue is solidified. The heat is conducted to the thermistor 222 through the cover plate 10, the insulating mounting cap 21 and the insulating fixing glue layer 24 in sequence. The insulating mounting cap 21, the insulating fixing glue layer 24, the insulating sleeve 26 and the wire sheath of the lead 23 can form a multi-layer insulating protection, the thermistor 222 and the core wire in the temperature sensor 20 have the multi-layer insulating protection, so that the temperature sensor 20 has good insulating performance, and a grounding wire does not need to be arranged.

Further, a plug key 25 is inserted into the insulative mounting cap 21, and an end of the thermistor 222 abuts against an end of the plug key 25. Referring to fig. 6 to 8, the plug 25 has two notches 251, the two terminals 223 are respectively disposed in the two notches 251, the outer side of the plug 25 is attached to the hole wall of the insulative mounting cap 21, which is aimed at separating the two terminals 223, the wires 23 and the leads 221, thereby avoiding the electric leakage caused by the short circuit between the wires 23, between the leads 221 and the wires and the piercing of the core wire through the insulative layer, and when the insulative fixing glue is filled, a part of the insulative fixing glue flows in, so as to be better fixed.

A shielding film 40 is adhered to one side of the cover plate 10, so that the insulating mounting cap 21 is positioned between the cover plate 10 and the shielding film 40 to shield, protect and position the insulating mounting cap 21. Wherein, the shielding film 40 can be an aluminum foil coated with adhesive.

A first adhesive layer 31 is provided between the cover plate 10 and the insulative mounting cap 21 to further position the temperature sensor 20. The first adhesive layer 31 may be a double-sided adhesive tape.

One side of the cover plate 10 has a mounting groove, the temperature sensor 20 is disposed in the mounting groove, and the shielding film 40 shields an opening of the mounting groove. Further, one end of the insulating mounting cap 21 is provided with a step portion 212, the step portion 212 is sleeved with a rubber sleeve 27, and the end portion of the rubber sleeve 27 and the other end of the insulating mounting cap 21 are respectively stopped against two opposite inner side walls of the mounting groove. The rubber sleeve 27 has elasticity, and when there is a difference between the length of the insulative mounting cap 21 and the length of the mounting groove, a horizontal acting force is generated to the insulative mounting cap 21 by using the elastic deformation of the rubber sleeve 27 itself, so that the insulative mounting cap 21 is better fixed in the mounting groove.

Further, a second adhesive layer 32 is provided between the glue sleeve 27 and the inner cavity wall of the mounting groove to better position the glue sleeve 27.

Referring to fig. 5, in some embodiments, the side of the insulative mounting cap 21 facing the cover plate has a flat surface to enable the insulative mounting cap 21 to have a larger area to absorb heat from the cover plate. Of course, in some embodiments, the cross-section of the insulative mounting cap 21 may also be configured to be circular.

In addition, a section of outer wall of the insulating mounting cap 21 opposite to the temperature sensing structure 22 can be attached to the cover plate 10, that is, the position of the insulating mounting cap 21 attached to the cover plate 10 is located above the temperature sensing structure 22, so as to absorb heat better.

Referring to fig. 3, in the second embodiment of the temperature sensing structure, compared with the first embodiment, in this embodiment, the cover plate 10 has a through hole, the outer side wall of the insulating mounting cap 21 has a convex portion 211 above the temperature sensing structure 22, the convex portion 211 is located in the through hole, and the sealing ring 11 is disposed between the convex portion 211 and the inner side wall of the through hole. The convex portion 211 and the insulative mounting cap 21 are integrally formed. The end of the insulating mounting cap 21 has a step, and a third adhesive layer 33 is provided between the step and the cover plate 10.

With this structure, heat is conducted to the thermistor 222 through the insulating mounting cap 21 and the insulating fixing adhesive layer 24 in sequence, in order to reduce heat loss caused when heat passes through the cover plate 10, reduce thermal resistance, increase heat conduction speed, and improve sensitivity and accuracy of temperature measurement. The sealing ring 11 can form sealing between the convex portion 211 and the inner side wall of the through hole, so that safety problems such as electric leakage and short circuit caused by water vapor passing through the cover plate 10 through the through hole are avoided.

Referring to fig. 4, in a third embodiment of the temperature sensing structure, compared with the first embodiment, in this embodiment, the cover plate 10 is not provided with a mounting groove for accommodating the insulating mounting cap 21, a section of outer wall of the insulating mounting cap 21 opposite to the temperature sensing structure 22 is attached to the cover plate 10, that is, the position of the insulating mounting cap 21 attached to the cover plate 10 is located above the temperature sensing structure 22, the end of the insulating mounting cap 21 has a step, and a third adhesive layer 33 is provided between the step and the cover plate 10.

With this structure, the kind and number of layers of materials through which heat is conducted to the thermistor 222 can be reduced, thermal resistance and heat loss can be reduced, the heat conduction speed can be increased, and the sensitivity and accuracy of temperature measurement can be improved.

In some embodiments, the insulative mounting cap 21 may be secured to the cover plate 10 by a snap-fit or the like.

For the cooking appliance, in some embodiments, a support may be provided on the cover, and when assembling, the cover plate 10 is mounted on the cover, and the support is pressed on the temperature sensor 20 to position the temperature sensor 20, and the shielding film 40 may not be provided to reduce the cost. Of course, the support and the shielding film 40 may be used in combination, i.e. the shielding film 40 is located between the temperature sensor and the support, to obtain a better fixing effect of the temperature sensor 20.

In the above embodiments, the plug key 25 may be made of ceramic material to ensure its insulating property, the insulating mounting cap 21 may be made of high thermal conductivity ceramic material, the insulating sleeve 26 may be made of plastic pipe capable of being processed by thermal shrinkage, and the insulating fixing glue may be made of high thermal conductivity silicone grease to make the temperature sensor 20 have good thermal conductivity, improve thermal conductivity efficiency, and further improve detection accuracy and sensitivity of the temperature sensor 20. Most of the silicone grease on the market at present has good insulating property, so that the silicone grease can be used as a stable heat conduction material for electronic components.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A temperature sensing detection structure, comprising:

a cover plate (10);

temperature sensor (20), including insulating installation cap (21), temperature sensing structure (22), wire (23) and at least one deck insulation support (26), insulating installation cap (21) are located one side of apron (10) and link to each other with apron (10), the inner chamber of locating insulating installation cap (21) is inserted in temperature sensing structure (22), and temperature sensing structure (22) are formed with two wiring ends (223), two wiring end (223) are connected with a wire (23) respectively, wire (23) and stretch into to insulating installation cap (21) are located to insulation support (26) cover, the inboard packing of insulating installation cap (21) is provided with insulating fixed glue layer (24).

2. A temperature sensing and detecting structure according to claim 1, wherein the temperature sensing structure (22) comprises a lead (221) and a thermistor (222) which are connected, and the thermistor (222) is positioned at one side of the inner cavity of the insulating mounting cap (21) close to the cover plate (10).

3. A temperature sensing and detecting structure according to claim 2, wherein a plug (25) is inserted into the insulative mounting cap (21), the end of the thermistor (222) abuts against the end of the plug (25), the plug (25) has two notches (251), and the two terminals (223) are respectively disposed in the two notches (251).

4. The temperature sensing and detecting structure according to claim 1, wherein a shielding film (40) is attached to one side of the cover plate (10) so that the insulative mounting cap (21) is located between the cover plate (10) and the shielding film (40).

5. A temperature sensing and detecting structure according to claim 1, wherein a first adhesive layer (31) is provided between the cover plate (10) and the insulative mounting cap (21).

6. A temperature sensing and detecting structure according to any one of claims 1 to 5, wherein one side of the cover plate (10) has a mounting groove, and the temperature sensor (20) is disposed in the mounting groove.

7. The temperature sensing and detecting structure according to claim 6, wherein one end of the insulating mounting cap (21) has a step portion (212), the step portion (212) is sleeved with a rubber sleeve (27), and an end portion of the rubber sleeve (27) and the other end of the insulating mounting cap (21) respectively abut against two opposite inner side walls of the mounting groove.

8. A temperature sensing and detecting structure according to any one of claims 1 to 5, wherein the cover plate (10) has a through hole, the outer side wall of the insulative mounting cap (21) has a convex portion (211) above the temperature sensing structure (22), and the convex portion (211) is located in the through hole.

9. The temperature sensing and detecting structure according to claim 8, wherein a sealing ring (11) is provided between the protrusion (211) and the inner sidewall of the through hole.

10. A cooking appliance comprising the temperature sensing detection structure of any one of claims 1 to 9.