CN111312560A

CN111312560A - Overload overtemperature power failure self-recovery protector for household appliances

Info

Publication number: CN111312560A
Application number: CN202010309511.7A
Authority: CN
Inventors: 常江
Original assignee: Nanjing Haichuan Electronics Co ltd
Current assignee: Nanjing Haichuan Electronics Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-06-19

Abstract

The invention belongs to the technical field of intelligent household equipment, and particularly discloses a self-recovery protector for overload and overtemperature power failure of household appliances, which comprises a fixed seat, wherein a fixed groove is arranged on the fixed seat, a conductive elastic sheet is arranged at the bottom end of the fixed groove, a PTC heating element is arranged on the conductive elastic sheet, a No. 1 terminal is arranged on the PTC heating element, an adjusting plate is arranged in a mounting groove on the fixed seat, a bimetallic sheet element is arranged on the adjusting plate, one end of the bimetallic sheet element is symmetrically provided with a C contact, one side of the mounting groove is symmetrically provided with an NC contact and an NO contact respectively, one end of a No. 2 terminal is connected with the adjusting plate and the bimetallic sheet element, a No. 3 terminal is connected with a heating wire element, the heating wire element is, no. 3 terminal and heater connection piece are moulded plastics at the fixing base, and the cover is equipped with the shell on the fixing base. Compact structure, but a plurality of fields such as wide application in wiring board, smart jack, all kinds of domestic appliance.

Description

Overload overtemperature power failure self-recovery protector for household appliances

Technical Field

The invention relates to the field of intelligent household equipment, in particular to a self-recovery protector for overload and overtemperature power failure of household appliances.

Background

At present, common household electrical appliance protectors are overload protection or overtemperature protection.

One type of overload protection is a fuse protector (fuse), and the disadvantage of the overload protection is that the fuse protector is used for one-time protection and cannot be recovered; the other is a breaker, which has the disadvantages of large volume and large installation requirement space, and is not beneficial to the installation of sockets, smart homes and the interiors of household appliances.

Overtemperature protection electronic components are thermal protectors based on bimetallic strips generally, and the working principle is as follows: when the medium temperature of the thermal protector reaches the rated jump-start temperature of the bimetal element in the thermal protector through sensing the household appliance, the bimetal element acts to cut off the power supply, and when the medium temperature is reduced to the rated recovery temperature, the bimetal sheet recovers to switch on the power supply. The electric appliance is in an unknown state during recovery, and potential safety hazards exist.

In the above, all the protectors of the household appliances are single protection against overload or overtemperature, and potential hazards exist in the safety of temperature protection. The protector with a plurality of functions is used for carrying out double protection, so that the cost is greatly increased. In order to realize the function of cutting off the power supply after temperature protection, a designer uses the thermal protector as a temperature sensor, and not only the cost is increased, but also the safety protection characteristic of the protector is lost through chip program control. The overload and overtemperature power failure self-recovery protector for the household appliance is designed to solve the problems.

Disclosure of Invention

The invention aims to provide a self-recovery protector for overload, overtemperature and power failure of household appliances, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a self-recovery protector for overload and overtemperature power failure of household appliances comprises a fixed seat, an adjusting plate, a PTC heating element, a No. 1 terminal, a conductive elastic sheet, a NO contact, a shell, an NC contact, a C contact, a bimetallic strip element, a No. 2 terminal, a No. 3 terminal, a heating wire element and a heating wire connecting sheet, wherein a fixed groove is formed in the fixed seat, the bottom end of the fixed groove is provided with the conductive elastic sheet, the PTC heating element is arranged on the conductive elastic sheet, the No. 1 terminal is arranged on the PTC heating element, an adjusting plate is arranged in a mounting groove in the fixed seat, the bimetallic strip element is arranged on the adjusting plate, the C contact is symmetrically arranged at one end of the bimetallic strip element, the NC contact and the NO contact are symmetrically arranged on one side of the mounting groove respectively, the adjusting plate and the bimetallic strip element, the heating wire element is connected with the heating wire connecting piece, one end of the heating wire connecting piece is connected with the NC contact, the No. 1 terminal, the No. 2 terminal, the No. 3 terminal and the heating wire connecting piece are injected on the fixing seat, and the shell is sleeved on the fixing seat.

Preferably, the fixing seat is made of high-temperature-resistant insulating material.

Preferably, the heating wire element is located right below the bimetallic strip element.

Preferably, the PTC heating element is a ceramic heating element.

Preferably, the No. 1 terminal is connected with the PTC heating element and forms an open circuit with the No. 2 terminal, and the No. 3 terminal is connected with the heating wire element and forms a closed circuit with the No. 2 terminal.

Preferably, the No. 1 terminal, the No. 2 terminal and the No. 3 terminal are plug-in terminals, can be connected with wires and can be plugged into a PCB.

Compared with the prior art, the invention has the beneficial effects that: the invention belongs to the technical field of intelligent household equipment, and particularly discloses a household appliance overload and overtemperature power failure self-recovery protector. But a plurality of fields such as wide application in wiring board, smart jack, intelligent house, all kinds of domestic appliance.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a circuit diagram of the present invention;

FIG. 4 is a pin diagram of the present invention;

in the figure: 1. a fixed seat; 2. an adjusting plate; 3. a PTC heating element; 4. a terminal No. 1; 5. a conductive spring plate; 6. a NO contact; 7. a housing; 8. NC contact; 9. c contact; 10. a bimetal element; 11. terminal No. 2; 12. a terminal No. 3; 13. a heater element; 14. a heating wire connecting sheet; 15. fixing grooves; 16. and (4) mounting the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-4, the present invention provides a technical solution: an overload overtemperature power failure self-recovery protector for household appliances comprises a fixing seat 1, an adjusting plate 2, a PTC heating element 3, a terminal No. 14, a conductive elastic sheet 5, a NO contact 6, a shell 7, an NC contact 8, a C contact 9, a bimetallic strip element 10, a terminal No. 2 11, a terminal No. 3 12, a heating wire element 13 and a heating wire connecting sheet 14, wherein a fixing groove 15 is formed in the fixing seat 1, the conductive elastic sheet 5 is arranged at the bottom end of the fixing groove 15, the PTC heating element 3 is arranged on the conductive elastic sheet 5, the terminal No. 14 is arranged on the PTC heating element 3, the adjusting plate 2 is arranged in a mounting groove 16 in the fixing seat 1, the bimetallic strip element 10 is arranged on the adjusting plate 2, the C contact 9 is symmetrically arranged at one end of the bimetallic strip element 10, the NC contact 8 and the NO contact 6 are, no. 2 terminal 11 one end connection regulating plate 2 and bimetallic strip component 10, No. 3 terminal 12 is connected with heater element 13, heater element 13 is connected with heater connection piece 14, heater connection piece 14 one end is connected with NC contact 8, No. 1 terminal 4, No. 2 terminal 11, No. 3 terminal 12 and heater connection piece 14 are moulded plastics on fixing base 1, the cover is equipped with shell 7 on the fixing base 1.

Further, the fixing seat 1 is made of a high-temperature-resistant insulating material.

Further, the heating wire element 13 is located right below the bimetal element 10.

Further, the PTC heating element 3 is a ceramic heating element.

Further, the terminal No. 1 is connected with the PTC heating element 3 and forms an open circuit with the terminal No. 2 11, and the terminal No. 3 is connected with the heating wire element 13 and forms a closed circuit with the terminal No. 2 11.

Furthermore, the No. 1 terminal 4, the No. 2 terminal 11 and the No. 3 terminal 12 are plug-in terminals, can be connected with wires and can be plugged into a PCB.

The working principle is as follows: the invention relates to a self-recovery protector for overload and overtemperature power failure of a household appliance, which is used for bridging heating wire elements with corresponding technical parameters according to different power of protected loads, simultaneously, the heating wire elements 13 can be adjusted in a wider range according to different materials, sectional areas, lengths, shapes and resistivities, meanwhile, the arranged bimetallic strip elements 10 form bimetallic strip elements 10 with different resistances according to the resistivities of different materials, and meanwhile, different bounce temperatures can be adjusted technically to form bimetallic strip elements 10 required by various specifications; during operation, referring to fig. 3, a live wire L is connected with a No. 2 terminal 11 and then is linked with a bimetallic strip element 10, a C contact 9 and an NC contact 8 on the bimetallic strip element 10 form a closed circuit, and are connected in series with a built-in heating wire element 13 to lead out a No. 3 terminal 12 which is connected in series with a load, and the other end of the load is connected with a zero line N to form a loop; when the load power is overloaded, the loop current is greater than the rated working current of the load, the built-in heating wire element 13 and the bimetallic strip element 10 heat simultaneously, and the bimetallic strip element 10 acts when the action temperature of the bimetallic strip element 10 is reached, so that the load loop is powered off; or when the protector senses that the load temperature rises and reaches the action temperature of the bimetallic strip element 10, the bimetallic strip element 10 acts, so that the load loop is powered off, and a double protection effect is achieved; after the bimetallic strip element 10 acts, the C contact 9 is communicated with the NO contact 6, the PTC heating element 3 is connected in series to lead out a No. 1 terminal 4, a series indicator lamp is connected with a zero line N or a control loop to form a loop, the built-in PTC heating element 3 starts to generate heat to provide heat for the interior of the protector, the temperature is kept higher than the recovery temperature of the bimetallic strip element 10, the bimetallic strip element 10 is always in an acting state, and the load loop is kept to be broken; after the main power supply L, N is cut off, the protector loses power, the PTC heating element 3 stops heating, when the interior of the protector is cooled to the temperature of the bimetallic strip element 10, the bimetallic strip element 10 is restored to the initial state, and the C contact 9 is communicated with the NC contact 8; the protector realizes the function of self-recovery when power is off.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a domestic appliance overload overtemperature power failure self recovery protector which characterized in that: comprises a fixed seat (1), an adjusting plate (2), a PTC heating element (3), a No. 1 terminal (4), a conductive elastic sheet (5), a NO contact (6), a shell (7), an NC contact (8), a C contact (9), a bimetallic strip element (10), a No. 2 terminal (11), a No. 3 terminal (12), a heater element (13) and a heater connecting sheet (14), wherein a fixed groove (15) is arranged on the fixed seat (1), the conductive elastic sheet (5) is arranged at the bottom end of the fixed groove (15), the PTC heating element (3) is arranged on the conductive elastic sheet (5), the No. 1 terminal (4) is arranged on the PTC heating element (3), the adjusting plate (2) is arranged in a mounting groove (16) on the fixed seat (1), the bimetallic strip element (10) is arranged on the adjusting plate (2), one end of the bimetallic strip element (10) is symmetrically provided with the C contact (9, mounting groove (16) one side symmetry respectively is provided with NC contact (8) and NO contact (6), regulating plate (2) and bimetallic strip component (10) are connected to No. 2 terminal (11) one end, No. 3 terminal (12) are connected with heater element (13), heater element (13) are connected with heater connection piece (14), heater connection piece (14) one end is connected with NC contact (8), No. 1 terminal (4), No. 2 terminal (11), No. 3 terminal (12) and heater connection piece (14) are moulded plastics on fixing base (1), the cover is equipped with shell (7) on fixing base (1).

2. The overload, overtemperature and power failure self-recovery protector for the household appliances according to claim 1 is characterized in that: the fixing seat (1) is made of high-temperature-resistant insulating materials.

3. The overload, overtemperature and power failure self-recovery protector for the household appliances according to claim 1 is characterized in that: the heating wire element (13) is positioned right below the bimetallic strip element (10).

4. The overload, overtemperature and power failure self-recovery protector for the household appliances according to claim 1 is characterized in that: the PTC heating element (3) is a ceramic heating element.

5. The overload, overtemperature and power failure self-recovery protector for the household appliances according to claim 1 is characterized in that: no. 1 terminal (4) is connected PTC heating element (3) and is formed open circuit with No. 2 terminal (11), No. 3 terminal (12) is connected heater element (13) and is formed closed circuit with No. 2 terminal (11).

6. The overload, overtemperature and power failure self-recovery protector for the household appliances according to claim 1 is characterized in that: no. 1 terminal (4), No. 2 terminal (11) and No. 3 terminal (12) are plug-in components terminal, can connect the line, can insert the PCB board.