CN218181386U - Heating resistor power-off reset temperature controller and electric appliance adopting same - Google Patents

Abstract

A heating resistor power-off reset temperature controller and an electric appliance adopting the same, wherein the temperature controller comprises a heating carbon paste layer, an electrode, a spring and a temperature control switch; the temperature control switch comprises a shell, and an inner core part is arranged in the shell; a heating guide frame is embedded right above the shell, a disc is arranged right above the heating guide frame, and a sealing cover covers the disc; the lower surface of the heating guide frame is provided with a pair of electrodes which are opposite in position, and a heating carbon paste layer is arranged between the opposite electrodes; the heating carbon slurry layer and the disc are in parallel connection in a circuit; the bottom of the inner core part is provided with a U-shaped movable spring, one side of the U-shaped movable spring is connected to the bottom surface of the inner wall of the shell through a step rivet, the other side of the U-shaped movable spring is provided with a movable contact, the upper surface of the movable contact is in contact with a fixed contact, the fixed contact penetrates through one end of a fixed connecting plate, the other end of the fixed connecting plate is connected with a step rivet II, and the exposed parts of the two step rivets are all penetrated with springs.

Description

Heating resistor power-off reset temperature controller and electric appliance adopting same

Technical Field

The utility model relates to a temperature controller technical field, concretely relates to heating resistor outage reset temperature controller and adopt its electrical apparatus.

Background

An automatic temperature control temperature controller or an NTC combined circuit is designed in a common household appliance heating and constant temperature type electric appliance temperature control mode to control the temperature to achieve the constant temperature purpose; however, when the automatic temperature control temperature controller or the NTC is abnormal, the circuit resets the temperature controller by means of a temperature fuse or manually, so that the overtemperature protection circuit is realized to avoid personnel injury or property loss, and the damage of the electrical appliance is convenient for secondary maintenance;

the first fuse is characterized in that: the disposable protector needs to be repaired and replaced by a new fuse when a maintenance worker goes to the door, and the maintenance cost is high!

The second manual reset temperature controller is characterized in that: the manual reset can be used normally again, but the disassembly and the maintenance according to factors such as reset need to be considered, and the manual reset can be completed only by professional maintenance personnel who get on and off the machine.

PTC is an abbreviation of Positive Temperature Coefficient, which means a Positive Temperature Coefficient, and generally refers to a semiconductor material or a device with a large Positive Temperature Coefficient. In general, reference to PTC refers to positive temperature coefficient thermistors, referred to as PTC thermistors for short. A PTC thermistor is a semiconductor resistor typically having temperature sensitivity, and its resistance value increases stepwise with an increase in temperature (curie temperature) beyond a certain temperature.

The ceramic PTC is a semiconductor ceramic which is prepared by sintering barium titanate (or strontium, lead) as a main component, a small amount of rare earth (Y, nb, bi, sb), an acceptor (Mn, fe), and an additive such as glass (silicon oxide, aluminum oxide).

The ceramic PTC has small resistance below the Curie temperature, and the resistance step change property above the Curie temperature is increased by 1000-million times.

PTC resistors (thermistors) are classified into: ceramic PTC resistor, organic macromolecule PTC resistor;

thermistors are classified according to their use: PTC resistor for automatic degaussing, PTC resistor for delayed start, PTC resistor for constant temperature heating, PTC resistor for overcurrent protection, PTC resistor for overheat protection, and PTC resistor for sensor

The organic polymer PTC resistor is suitable for occasional overcurrent protection products or circuits, and the ceramic PTC resistor is suitable for products or circuits with frequent overcurrent for various applications listed above.

The PTC effect still exists when the resistance value of the polymer PTC is not changed too much after 6000 overcurrent, and the PTC effect still exists when the resistance value of the ceramic PTC is not changed too much after 10 ten thousand overcurrent.

The PTC power-off reset temperature controller solves the problems on the basis, and the power-off reset snap-action temperature controller automatically performs action protection after the heating type electric appliance is subjected to over-temperature protection, so that a circuit is disconnected; the temperature controller can be reset and powered on only by disconnecting the power supply, so that personnel can be prevented from going to the door for maintenance;

however, the PTC power-off reset temperature controller needs to be combined with the temperature controller in terms of the structural design of an independent PTC heating element, the creepage and electrical appliance distance needs to be considered, the conductive contact is very complex at high temperature, the assembly process difficulty of the temperature controller is high, the automatic production efficiency is extremely low, the production and manufacturing cost is high, and the long-term development is not facilitated to meet the large-scale production condition;

therefore, a heating carbon paste power-off reset temperature controller is urgently needed to be developed, a product which is simple in structure, capable of being automatically produced and low in process cost is achieved, application conditions of various fields in the future are easy to match and popularize, and large-scale production is easier to achieve.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: aiming at the technical defects of high manufacturing and production cost and the like caused by complex structure, high assembly process difficulty and extremely low automatic production efficiency of the conventional PTC heating element power-off reset temperature controller, the heating resistor power-off reset temperature controller and an electric appliance adopting the same are provided. The technical scheme of the utility model is that:

in a first aspect, the utility model provides a heating resistor power-off reset temperature controller, this temperature controller regard as protection mechanism with the carbon thick liquid layer that generates heat, the carbon thick liquid layer that generates heat is parallel relation with temperature detect switch in the circuit.

Further, the heating carbon paste layer is prepared from Ru metal oxide.

Further, the temperature controller comprises a heating carbon paste layer, an electrode, a spring and a temperature control switch;

the temperature control switch comprises a shell, wherein an inner core part is arranged in the shell;

a heating guide frame is embedded right above the shell, a disc is arranged right above the heating guide frame, and a sealing cover covers the disc;

the lower surface of the heating guide frame is provided with a pair of electrodes opposite in position, and the heating carbon paste layer is arranged between the opposite electrodes; the heating carbon paste layer and the disc are in parallel connection in the circuit;

the bottom of the inner core part is provided with a U-shaped movable spring, one side of the U-shaped movable spring is connected to the bottom surface of the inner wall of the shell through a step rivet, the other side of the U-shaped movable spring is provided with a movable contact, the upper surface of the movable contact is in contact with a fixed contact, the fixed contact penetrates through one end of a fixed connecting plate, the other end of the fixed connecting plate is connected with a step rivet II, and springs penetrate through exposed parts of the two step rivets.

Further, two sides of the U-shaped movable spring plate 05 are parallel and asymmetric. The fixed contact is made of silver-nickel alloy/red copper, the fixed connection plate is made of brass, the moving contact is made of silver-nickel alloy/red copper, the shell is made of ceramic (phenolic resin and/or PPS (polyphenylene sulfide) engineering plastics can be used), the moving reed is made of nickel-copper alloy, the heating guide frame is made of base material ceramic, electrode silver and rare earth Ru metal oxide, the disc is made of thermal bimetal, the step rivet is made of low-carbon steel tinned material, and the spring is made of stainless steel.

Furthermore, each step rivet and the corresponding inner diameter of the spring are assembled to form interference elastic contact (namely, the spring is clamped on the step rivet and cannot be clamped, the spring can be contracted and slightly expands towards the reverse diameter), and each spring is in contact with the corresponding electrode to form a conducting loop.

The electrode material is silver. The thickness of the heating carbon paste layer and the silver paste electrode is less than 0.1mm.

Furthermore, the disc is in an arc shape protruding upwards, and the upper surface of the heating guide frame opposite to the disc is in a concave shape matched with the arc shape;

the ceramic rod is arranged right below the disc, the ceramic rod extends downwards into the movable spring leaf of the inner core part, a raised semicircular structure is arranged on the upper surface of the U-shaped movable spring leaf opposite to the ceramic rod, the semicircular surface of the U-shaped movable spring leaf is in plane contact with the bottom end of the ceramic rod through the semicircular structure, and resistance production caused by plane and plane inclined contact is avoided.

Furthermore, the inner wall of the shell corresponding to the position of the moving contact is concave, and the dynamic space of the moving contact is reserved.

Further, the outer wall of the opening of the shell is provided with a raised edge which is used for being clamped with a sealing cover, and the sealing cover extends downwards to exceed the raised edge of the shell and horizontally extends outwards to be used as a handle.

Further, the sealing cover is made of rustproof aluminum.

Furthermore, 2 terminals are respectively connected to two ends of the bottom surface of the outer wall of the shell through rivets.

Further, the leading truck that generates heat with shells inner wall is equipped with the cooperation breach.

The gap is matched for error prompt, so that the contact between the electrode and the spring is prevented from being misplaced;

after each step rivet is assembled with the inner diameter of the spring, the spring is in interference elastic contact (namely the spring is clamped on the step rivet and cannot be clamped, and the spring can be contracted and slightly expanded towards the reverse direction of the diameter), so that the separation is prevented, and the purpose of positioning is achieved.

Furthermore, the first step rivet is a long step rivet, and the second step rivet is a short step rivet; the first step is a long step, and the second step is a short step; the specifications of the first spring and the second spring are completely the same, and the positions are convenient to distinguish;

each step rivet can be riveted with the assembly at the lower end, and a spring is assembled at the upper end, so that the multifunctional rivet is multipurpose in design and wide in application.

Compared with the prior art, the utility model, have following advantage and effect:

the utility model discloses simple structure, but automated production, the processing cost is low. The device is suitable for heat protection in various electric heating appliances such as an electric heater, a fan heater, a dehumidifier and the like, and can prevent the continuous rise of the electrifying temperature after the electrical appliances are abnormal. Safe and reliable, and wide application range.

Drawings

FIG. 1 is a schematic diagram of a cross-sectional structure of a heating resistor power-off reset temperature controller according to the present invention;

fig. 2 is a schematic view of the top view structure of the heating resistor power-off reset temperature controller of the present invention;

fig. 3 is a schematic view of the heating resistor power-off reset temperature controller according to the present invention;

FIG. 4 is a schematic diagram of a side view of the heating resistor power-off reset temperature controller of the present invention;

FIG. 5 is a schematic diagram of the heating resistor power-off reset temperature controller of the present invention;

fig. 6 is a schematic view of a three-dimensional structure of the heating resistor power-off reset temperature controller of the present invention;

FIG. 7 is a schematic diagram of a side view of the heating resistor power-off reset temperature controller of the present invention;

fig. 8 is a schematic structural view of the heating guide frame of the present invention;

fig. 9 is a schematic structural view of the inner core portion of fig. 3 in the present embodiment;

FIG. 10 is a schematic structural view of the stepped rivet according to the present invention;

fig. 11 is a schematic structural view of the inner core portion of the present invention;

fig. 12 is a schematic view of the cross-sectional structure of the heating resistor power-off reset temperature controller of the present invention.

Reference numerals are as follows:

01. the heating device comprises a fixed contact, 02, a fixed connecting plate, 03, a movable contact, 04, a shell, 05, a movable reed, 06, a heating guide frame, 07, a disc, 08, a short rivet, 09, a long rivet, 10, a terminal, 11, a sealing cover, 12, a ceramic rod, 13, a spring, 14, a heating carbon paste layer, 15, a notch, 16, an electrode, 17, a long step rivet, 18, a short step rivet, 19, a temperature control switch and 20, a heating element.

Detailed Description

The invention will be described in more detail with reference to the following drawings and specific embodiments, which are provided for illustration and not for limitation of the invention.

With reference to fig. 1-4, 6-9, and 11-12, the heating resistor is powered off to reset the temperature controller, which uses the heating carbon paste layer as a protection mechanism, and the heating carbon paste layer 14 and the temperature control switch 19 are connected in parallel in the circuit.

The heating carbon paste layer 14 is prepared from Ru metal oxide, and has the advantages of sensitive temperature rise, stable and adjustable power and uniform heating.

The temperature controller comprises a heating carbon paste layer 14, an electrode 16, a spring 13 and a temperature control switch 19;

the temperature control switch 19 comprises a shell 04, and an inner core part is arranged in the shell 04;

a heating guide frame 06 is embedded right above the shell, a disc 07 is arranged right above the heating guide frame 06, and a sealing cover 11 covers the disc 07;

a pair of electrodes 16 which are opposite in position are arranged on the lower surface of the heating guide frame 06, and a heating carbon paste layer 14 is arranged between the opposite electrodes 16; the heating carbon paste layer 14 and the disc 07 are in parallel connection in a circuit;

the bottom of the inner core part is provided with a U-shaped movable spring leaf 05, one side of the U-shaped movable spring leaf 05 is connected to the bottom surface of the inner wall of the shell 04 through a long step rivet 17, the other side of the U-shaped movable spring leaf 05 is provided with a movable contact 03, the upper surface of the movable contact 03 contacts with a fixed contact 01, the fixed contact 01 penetrates through one end of a fixed connecting plate 02, the other end of the fixed connecting plate 02 is connected with a short step rivet 18, and the exposed parts of the two step rivets penetrate through a spring 13.

Specifically, two sides of the U-shaped movable spring plate 05 are parallel and asymmetric. The fixed contact 01 is made of silver-nickel alloy/red copper, the fixed connecting plate 02 is made of brass, the moving contact 03 is made of silver-nickel alloy/red copper, the shell 04 is made of ceramic, the moving contact piece 05 is made of nickel-copper alloy, the heating guide frame 06 is made of base material ceramic, electrode silver and rare earth Ru metal oxide, the disc 07 is made of thermal bimetal, the step rivet is made of low-carbon steel tinned material, and the spring 13 is made of stainless steel. The polarity of the pair of electrodes 16 is the same.

Each step rivet is in interference elastic contact with the corresponding inner diameter of the spring 13 after being assembled (namely, the spring is clamped on the step rivet and cannot be clamped, the spring can be contracted and slightly expands towards the reverse diameter), and each spring 13 is in contact with the corresponding electrode 16 to form a conducting loop.

Specifically, the electrode 16 is made of silver. The thickness of the heating carbon paste layer 14 and the silver paste electrode 16 is less than 0.1mm.

The disc 07 is in an upward convex arc shape, and the upper surface of the heating guide frame 06 opposite to the disc 07 is in a concave shape matched with the arc shape;

a ceramic rod 12 is arranged right below the disc 07, the ceramic rod 12 extends downwards to the movable reed 05 of the inner core part, a raised semicircular structure is arranged on the upper surface of the U-shaped movable reed 05 opposite to the ceramic rod 12, the semicircular structure is used for enabling the point of the U-shaped movable reed to be in plane contact with the bottom end of the ceramic rod, and resistance production caused by plane-to-plane inclined contact is avoided.

The inner wall of the shell 04 corresponding to the moving contact 03 is concave to increase the moving space of the moving contact 03 on the U-shaped moving spring 05.

Further, the outer wall of the opening of the housing 04 is provided with a raised edge for snap-fitting with the cover, and the cover 11 extends downward beyond the raised edge of the housing 04 and horizontally outward as a handle.

Specifically, the sealing cover is made of antirust aluminum. The first step rivet is a long step rivet 17, and the second step rivet is a short step rivet 18; the first step is a long step 09, and the second step is a short step 08; the specifications of the first spring and the second spring are completely the same, and the positions are convenient to distinguish;

the bottom surface of the outer wall of the housing 04 is connected to 2 terminals 10 by long step rivets 17 and short step rivets 18, respectively. The 2 terminals are respectively in one-to-one correspondence and electrically connected with the 2 electrodes.

The heating guide frame 06 and the inner wall of the shell 04 are provided with matching notches.

Specifically, the notches are matched for error prompt, so that the contact between the electrode 16 and the spring 13 is prevented from being misplaced;

the assembly process of the heating resistor power-off reset temperature controller is as follows:

a long step rivet is penetrated into one side of the U-shaped movable reed 05 close to the bottom of the terminal 10 and the shell 04, and the long step and the spring 13 are screwed in, so that the spring 13 contacts the electrode 16; a short step rivet is penetrated into the terminal 10 and a fixed connection plate 02 in the shell 04, and the short step rivet and the spring 13 are screwed in, so that the two springs 13 are both contacted with the electrode 16; a moving contact 03 is installed on one side, close to the top, of the U-shaped movable reed 05, a fixed contact 01 is installed at one end of a fixed connecting plate 02, and the fixed contact 01 is in contact with the moving contact 03; a vertically downward ceramic rod 12 is arranged in the middle of the electrode 16, so that the bottom surface of the ceramic rod 12 contacts with a convex semicircular structure on the upper surface of the U-shaped movable spring leaf 05; a heating carbon paste layer 14 is arranged beside the electrode 16, and a heating guide frame 06, a disc 07 and a sealing cover 11 are covered on the top of the electrode 16 and the heating carbon paste layer 14 through a ceramic rod 12, so that the sealing cover 11 is buckled with the shell 04; the order of assembly is not sequential.

Referring to fig. 5, a temperature control method for a heating resistor power-off reset temperature controller:

the temperature controller is arranged at the front end of the heating element 20 and is connected with the heating element 20 so as to control the heating temperature of the heating element 20 in the circuit;

when the main power supply is started, the temperature of the electric appliance rises and reaches a temperature threshold value, the temperature control switch 19 is switched off, at the moment, the current forms a loop through the heating carbon paste layer 14, the heating carbon paste layer 14 is rapidly heated and is higher than the temperature threshold value, and the circuit is kept in a disconnected state all the time;

when the main power supply is turned off, the heating carbon paste layer 14 stops heating, the temperature drops below the threshold value, the temperature control switch 19 is closed, and the circuit is restored to the on state.

An electric appliance adopts the temperature controller for thermal protection, and the temperature controller is connected in the electric appliance: the application of an electric heater, a warm air blower and a dehumidifier.

Specifically, each step rivet is in interference elastic contact with the inner diameter of the spring 13 after assembly (namely, the spring is clamped on the step rivet and cannot be clamped, and the spring can be contracted and slightly expanded towards the reverse direction of the diameter), so that separation is prevented, and the positioning function is achieved.

More specifically, each step rivet can be riveted with the assembly at the lower end, and the spring 13 is assembled at the upper end, so that the multifunctional rivet is multipurpose in design and wide in application.

Examples

In this embodiment, the heating guide frame 06 is made of a ceramic substrate, the heating carbon paste layer 14 is made of a rare earth Ru metal oxide, and the electrode 16 is made of Ag silver.

And (3) measuring: the carbon paste resistance is 6-30k omega, the two silver testing electrodes 16 can generate heat (to 200-260 ℃) after being electrified, and the carbon paste layer 14 can not generate heat when being connected with a circuit in parallel; the thickness of the heating carbon paste layer and the thickness of the silver paste electrode are smaller than 0.1mm, and the heating carbon paste layer and the silver paste electrode are arranged on the heating guide frame 06 in an auxiliary mode, so that the structure is simple, the number of parts is small, and the mounting difficulty is reduced;

while the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. Heating resistor outage reset temperature controller, its characterized in that:

the temperature controller comprises a heating carbon paste layer, an electrode, a spring and a temperature control switch;

the temperature control switch comprises a shell, and an inner core part is arranged in the shell;

a heating guide frame is embedded right above the shell, a disc is arranged right above the heating guide frame, and a sealing cover covers the disc; the outer wall of the shell is connected with 2 terminals, and the 2 terminals and the 2 electrodes are respectively in one-to-one correspondence and are electrically connected;

the lower surface of the heating guide frame is provided with a pair of electrodes opposite in position, and the heating carbon paste layer is arranged between the opposite electrodes; the heating carbon slurry layer and the disc are in parallel connection in a circuit;

the bottom of the inner core part is provided with two U-shaped movable reeds with parallel and asymmetric edges, one edge of each U-shaped movable reed is connected to the bottom surface of the inner wall of the shell through a step rivet I, the other edge of each U-shaped movable reed is provided with a movable contact, the upper surface of the movable contact is in contact with a fixed contact, the fixed contact penetrates through one end of a fixed connecting plate, the other end of the fixed connecting plate is connected with a step rivet II, and the exposed parts of the two step rivets penetrate through springs.

2. The heating resistor power-off reset temperature controller according to claim 1, wherein: each step rivet and the corresponding inner diameter of the spring form interference elastic contact after being assembled, and each spring is in contact with the corresponding electrode to form a conducting loop.

3. The heating resistor power-off reset temperature controller according to claim 1, wherein: the disc is in an arc shape protruding upwards, and the upper surface of the heating guide frame opposite to the disc is in a concave shape matched with the arc shape.

4. The heating resistor power-off reset temperature controller of claim 3, wherein: a ceramic rod is arranged under the disc, the ceramic rod extends downwards into the movable reed of the inner core part, a raised semicircular structure is arranged on the upper surface of the U-shaped movable reed opposite to the ceramic rod, and the semicircular structure is used for enabling the semicircular surface of the U-shaped movable reed to be in contact with the bottom surface of the ceramic rod, so that the generation of resistance is reduced.

5. The heating resistor power-off reset temperature controller of claim 1, wherein:

the outer wall of the opening of the shell is provided with a raised edge which is used for being clamped with a sealing cover, and the sealing cover crosses the raised edge of the shell and horizontally extends outwards to be used as a handle; the sealing cover is made of an antirust aluminum material;

and two ends of the bottom surface of the outer wall of the shell are respectively connected with 2 terminals.

6. The heating resistor power-off reset temperature controller of claim 1, wherein: the leading truck that generates heat with shells inner wall is equipped with the cooperation breach for put the wrong suggestion.

7. The heating resistor power-off reset temperature controller of claim 1, wherein: the inner wall of the shell corresponding to the position of the moving contact is concave, so that the moving space of the moving contact on the U-shaped moving spring is increased.

8. The heating resistor power-off reset temperature controller according to claim 1, wherein: the thickness of the heating carbon paste layer and the silver paste electrode is less than 0.1mm.

9. The heating resistor power-off reset temperature controller of claim 1, wherein: the electrode is made of silver.

10. An electrical appliance, characterized by: is thermally protected by a temperature controller according to any of claims 1-9.

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