Dry burn protector

Abstract

The invention relates to a device for connecting upper and lower appliances to be powered on and having a dry-burning protection function. The device comprises a plastic shell, a plastic jumper, a fixing buckle, an L-pole copper ring, an L-pole conductive sheet, an L-pole fixing frame, an N-pole copper ring, an N-pole conductive sheet, an N-pole fixing frame, a D2-pole copper ring, a D2-pole conductive sheet, a D1-pole conductive sheet, a central axis, a grounding copper ring, an iron frame, a bimetallic sheet and a porcelain rod. The front of the plastic shell is equipped with the central axis, the L-pole copper ring, the N-pole copper ring, the D2-pole copper ring and the grounding copper ring, the inside of the plastic shell is respectively equipped with the L-pole fixing frame, the L-pole conductive sheet, the N-pole fixing frame, the N-pole conductive sheet, the D1-pole conductive sheet, the D2-pole conductive sheet, the plastic jumper and the porcelain rod, and the upper end of the plastic shell is equipped with the iron frame so that the bimetallic sheets equipped on the iron frame are respectively located above the porcelain rod.

Description

Technical Field

[0001] The invention relates to a device for connecting upper and lower appliances to be powered and having a dry-burning protection function, belonging to the field of household appliances. Background Art

[0002] In people's daily life, the use of small household appliances such as electric kettles, car cups, health kettles, and woks is becoming more and more popular, and people are paying more and more attention to the safety of electrical appliances. Therefore, for example, in the process of using an electric kettle, if people accidentally touch the switch and turn on the switch when there is no water in the kettle, the kettle will be dry-boiling without water, which may easily cause the kettle to catch fire and cause safety accidents, or various control switches fail, resulting in dry-boiling without water, etc. Therefore, there is a need for a device that can provide multiple protections. Even if the switch fails or the protection fails, there is always a protection that can play a role. There are many types of devices for dry-boiling protection on the existing market, and most of them only play a conventional protection role and cannot guarantee 100% protection. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device with simple structure, convenient installation, good performance and long service life, which can ensure that the heater can fully play a protective role when dry-burning.

[0004] The technical scheme of the dry-burning protector of the present invention is as follows: the dry-burning protector is mainly composed of a plastic shell, a plastic jumper, a fixing buckle, an L-pole copper ring, an L-pole conductive sheet, an L-pole fixing frame, an N-pole copper ring, an N-pole conductive sheet, an N-pole fixing frame, a D2-pole copper ring, a D2-pole conductive sheet, a D1-pole conductive sheet, a central axis, a grounding copper ring, an iron frame, a bimetallic sheet and a porcelain rod; the front of the plastic shell has a concave circular space, the center is equipped with a central axis, the periphery is respectively equipped with an L-pole copper ring, an N-pole copper ring, a D2-pole copper ring and a grounding copper ring, and the inner plane of the plastic shell is respectively equipped with an L-pole conductive sheet, an N-pole conductive sheet, a D2-pole conductive sheet and a D1-pole conductive sheet, so that the L-pole conductive sheet is connected to the L-pole copper ring, the N-pole conductive sheet is connected to the N-pole copper ring, the D2-pole conductive sheet is connected to the D2-pole copper ring, the D1-pole conductive sheet is connected to the central axis, and the D2-pole conductive sheet, the D2-pole conductive sheet and the D1-pole conductive sheet are connected. The 1-pole conductive sheet is fixed to the plastic shell by screws. An L-pole fixing frame and an N-pole fixing frame are installed on the outer side of the plastic shell, so that the L-pole fixing frame and the L-pole conductive sheet are connected through a group of normally closed contacts, and the N-pole fixing frame and the N-pole conductive sheet are also connected through a group of normally closed contacts. The plastic shell has a hollow cylinder above the L-pole conductive sheet and the N-pole conductive sheet respectively. The porcelain rod rides on the L-pole conductive sheet and the N-pole conductive sheet through the hollow cylinder. Two bimetallic sheets are installed on both sides of the iron frame, and the iron frame is installed on the upper end of the plastic shell and is fastened to the plastic shell by screws, so that the two bimetallic sheets installed on the iron frame are respectively located directly above the porcelain rod. There is a plastic jumper above the L-pole conductive sheet, which is supported by the plastic shell fixing pillar and fixed to the plastic shell by the fixing buckle.

[0005] After the L-pole fixing frame and the L-pole conductive sheet are assembled in the plastic shell, they are connected through a group of normally closed contacts. The plastic shell has a hollow cylinder above the L-pole conductive sheet, which is equipped with the porcelain rod, and a bimetallic sheet assembled on the iron frame is arranged above the porcelain rod. The characteristic of the bimetallic sheet is that under high temperature, the bimetallic sheet will act on the porcelain rod through its own deformation, and the normally closed contacts on the L-pole fixing frame and the L-pole conductive sheet will be disconnected through the porcelain rod, which plays the role of power off, thereby achieving the role of protection.

[0006] After the N-pole fixing frame and the N-pole conductive sheet are assembled in the plastic shell, they are also connected through a group of normally closed contacts. A hollow cylinder is placed on the N-pole conductive sheet in the plastic shell, which is equipped with the porcelain rod, and a bimetallic strip assembled on the iron frame is arranged above the porcelain rod. The characteristic of the bimetallic strip is that under high temperature, the bimetallic strip will act on the porcelain rod through its own deformation, and the normally closed contacts on the N-pole fixing frame and the N-pole conductive sheet will be disconnected through the porcelain rod, thereby playing a power-off role, thereby achieving a protective role.

[0007] The main body of the plastic jumper is a rectangle or a cylinder, etc., with a cylindrical or other shaped rod extending from the top of one end, a circular hole at the bottom, and a chamfered inclined surface at the other end. There is a truncated cone in the middle of the two sides of the plastic jumper, which are respectively assembled on the brackets on the plastic shell and fixed to the plastic shell by fixing buckles. The characteristic is that the plastic jumper is located above the L-pole conductive sheet, and the truncated cones on the two sides of the plastic jumper make the plastic jumper like a seesaw, and it will tilt up and down around the truncated cones. A spring is installed in the circular hole below one end face of the plastic jumper, and the cylinder above passes through the iron frame. Under the action of the spring, the plastic jumper rotates around the truncated cones on the two sides, so that the other end face of the plastic jumper acts on the L-pole conductive sheet, thereby disconnecting the normally closed contacts on the L-pole fixing frame and the L-pole conductive sheet, thereby playing a protective role.

[0008] The cylinder or rod extending from the plastic shell is made of plastic or a material with a melting point between 230°C and 250°C.

[0009] The dry-burning protector of the invention of the technical solution has good protection effect, safe use, simple structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a three-dimensional rendering of the front side of the dry-burn protector.

[0011] Figure 2 This is a three-dimensional rendering of the back of the dry-burn protector.

[0012] Figure 3 This is a rendering of the internal structure of the dry-burning protector.

[0013] Figure 4 It is a three-dimensional picture of the plastic jumper of the dry burn protector.

[0014] Figure 5 This is a schematic diagram of the heating plate of the dry-burn protector. DETAILED DESCRIPTION

[0015] The present invention discloses a dry burning protector, such as Figure 1-Figure 5 As shown, the dry-burning protector includes a plastic shell 004, a plastic jumper 309, a fixing buckle 310, an L-pole copper ring 001, an L-pole conductive sheet 311, an L-pole fixing frame 315, an N-pole copper ring 006, an N-pole conductive sheet 306, an N-pole fixing frame 301, a D2-pole copper ring 002, a D2-pole conductive sheet 320, a D1-pole conductive sheet 317, a central axis 005, a grounding copper ring 003, an iron frame 102, bimetallic sheets 101, 104 and porcelain rods 304, 312.

[0016] Figure 1It is a three-dimensional effect diagram of the front of the dry-burning protector. The front of the plastic shell 004 has a concave circular space with a round hole in the center, on which the central axis 005 is installed. The concave area is respectively provided with slots for installing the L-pole copper ring 001, the N-pole copper ring 006, the D2-pole copper ring 002 and the grounding copper ring 003, and the L-pole copper ring 001, the N-pole copper ring 006, the D2-pole copper ring 002 and the grounding copper ring 003 are installed in the corresponding slots.

[0017] Figure 2 This is a three-dimensional effect diagram of the back of the dry burn protector. Figure 3 : This is a rendering of the internal structure of the dry-burning protector. On the inner plane of the plastic shell 004, there are slots for assembling the L-pole conductive sheet 311, the N-pole conductive sheet 306, the D2-pole conductive sheet 320, and the D1-pole conductive sheet 317, respectively. The D1-pole conductive sheet 317 and the D2-pole conductive sheet 320 are assembled in the corresponding slots and fastened to the plastic shell 004 by screws 316 and 319, so that the D1-pole conductive sheet 317 is connected to the central axis 005, the D2-pole conductive sheet 320 is connected to the D2-pole copper ring 002, and the L-pole conductive sheet After the corresponding slots are assembled, 311 is connected to the L-pole copper ring 001 by riveting, and the L-pole conductive sheet 311 is fastened to the plastic shell 004. The N-pole conductive sheet 306 is connected to the N-pole copper ring 006 by riveting after the corresponding slots are assembled, and the N-pole conductive sheet 306 is fastened to the plastic shell 004. The side of the plastic shell 004 is equipped with slots for the L-pole fixing frame 315 and the N-pole fixing frame 301. The L-pole fixing frame 315 and the N-pole fixing frame 301 are fastened to the plastic shell 004 by riveting. After assembly, The L-pole fixing frame 315 and the L-pole conductive sheet 311 are connected through a group of normally closed contacts 314, and the N-pole fixing frame 301 and the N-pole conductive sheet 306 are also connected through a group of normally closed contacts 302. The plastic housing 004 has hollow cylinders 313 and 303 extending above the L-pole conductive sheet 311 and the N-pole conductive sheet 306 for assembling the porcelain rods 312 and 304. The two sides of the iron frame 102 are respectively equipped with two bimetallic sheets 101 and 104, and the iron frame 102 is locked on the upper part of the plastic housing 004 by screws 103, so that the iron frame 102 is connected to the grounding copper ring 003, and the two bimetallic strips 101 and 104 assembled on the iron frame 102 are respectively located above the two porcelain rods 312 and 304. At a certain temperature, the bimetallic strips 101 and 104, through their own deformation, act on the porcelain rod 312 on the L-pole conductive sheet 311 and the porcelain rod 304 on the N-pole conductive sheet 306 respectively, and disconnect the normally closed contact 313 on the L-pole fixing frame 315 and the L-pole conductive sheet 311, and the normally closed contact 303 on the N-pole fixing frame 301 and the N-pole conductive sheet 306, thereby playing a protective role.

[0018] Figure 4 It is a three-dimensional diagram of a plastic jumper 309 of a dry-burning protector. The main body of the plastic jumper 309 is a rectangular parallelepiped or a cylinder, etc. A cylinder 406 extends from the upper plane of one end thereof. It can also be a rectangular parallelepiped or other shapes. Its material is a melt with a melting point of 220-250 degrees. The lower plane has a circular hole 403 for assembling a spring 307. The other end is a chamfered inclined surface 401. A truncated cone 402 and 405 extend from the middle part of the two side surfaces of the main body respectively. Two supports extend from the inner plane of the plastic shell 004. The plastic jumper 309 is assembled on the support of the plastic shell 004 through the truncated cones 402 and 405 on the two side surfaces, and is clamped by the fixing buckle 310, so that the plastic jumper 309 swings up and down around the truncated cones 402 and 405 on the side surfaces like a seesaw. The cylinder 406 on the plastic jumper 309 passes through the circular hole 105 on the iron frame 102 for contacting the heating plate.

[0019] In a specific embodiment, Figure 5 Schematic diagram of the dry-burning protector assembled with the heating plate. After the dry-burning protector is assembled on the heating plate 601, the cylinder 406 on the plastic jumper 309 contacts the plane of the heating plate 601, and one end 401 of the plastic jumper 309 is suspended on the L-pole conductive sheet 311, so that the L-pole conductive sheet 311 and a group of contacts 314 on the L-pole fixing frame 315 are in a normally closed state. When the heating plate 601 is dry, the L-pole copper ring 001 and the N-pole copper ring 002 of the dry-burning protector are closed. The copper ring 006 is connected to the L pole and N pole of the power supply respectively, and the temperature of the heating plate 601 will continue to rise. Under normal circumstances, when the heating plate 601 reaches a certain temperature, the two bimetallic strips 101 and 104 assembled on the iron frame 102 act on the porcelain rods 312 and 304 on the L pole conductive sheet 311 and the N pole conductive sheet 306 through their own deformation, and the L pole fixing frame 315 and the L pole conductive sheet 311, the N pole fixing frame 301 and the N pole conductive sheet The normally closed contacts 314 and 302 on the sheet 306 are disconnected, which plays a role of power-off protection. For example, when the two bimetallic strips 101 and 104 on the dry-burning protector fail at the same time, the temperature of the heating plate 601 will continue to rise. Since the cylinder 406 on the plastic jumper 309 is pressed on the plane of the heating plate 601 under the action of the spring 307, after reaching the melting temperature of the cylinder 406 on the plastic jumper 309, as the cylinder 406 melts, under the action of the spring 307, the plastic jumper 309 will rotate around the frustum 402 and 405 on both sides thereof, so that one end of the plastic jumper 309 is pressed down on the L-pole conductive sheet 311, and the normally closed contacts 314 of the L-pole fixing frame 315 and the L-pole conductive sheet 311 are disconnected, which plays a role of power-off protection. Because the material of the plastic jumper 309 is plastic melt, it will definitely melt when the temperature of the heating plate 601 continues to rise, so that it can play a 100% protective role.

Claims

1. A dry-burning protector, comprising a plastic shell (004), a plastic jumper (309), a fixing buckle (310), an L-pole copper ring (001), an L-pole conductive sheet (311), an L-pole fixing frame (315), an N-pole copper ring (006), an N-pole conductive sheet (306), an N-pole fixing frame (301), a D2-pole copper ring (002), a D2-pole conductive sheet (320), a D1-pole conductive sheet (317), a central axis (005), a grounding copper ring (003), an iron frame (102), bimetallic sheets (101, 104) and a porcelain rod (312, 304), wherein the front side of the plastic shell (004) is equipped with the central axis (005), the L-pole copper ring (001), The N-pole copper ring (006), the D2-pole copper ring (002), the grounding copper ring (003), and the plastic housing (004) are respectively equipped with an L-pole fixing frame (315), an L-pole conductive sheet (311), an N-pole fixing frame (301), an N-pole conductive sheet (306), a D1-pole conductive sheet (317), a D2-pole conductive sheet (320), and a plastic jumper (309); a group of normally closed contacts (314) are connected between the L-pole conductive sheet (311) and the L-pole fixing frame (315); a group of normally closed contacts (302) are connected between the N-pole conductive sheet (306) and the N-pole fixing frame (301); and the iron frame (102) is equipped at the upper end of the plastic housing (004); The main body of the plastic jumping rod (309) is a cuboid or a cylinder (406), one end of which has a cylinder (406) or a cuboid extending from the top, a circular hole (403) on the lower end, and an inclined surface (401) on the other end. Two truncated cones (402, 405) are provided on the two side surfaces of the main body; A cylinder (406) extends from the plastic jumper (309), and its material is a plastic melt; The plastic jumper (309) has two truncated cones (402, 405) on both sides of the main body. The plastic jumper (309) is mounted on a support on the inner plane of the plastic shell (004) and is located above the L-pole conductive sheet (311). The plastic jumper (309) is fastened with a fixing buckle (310). Under the action of the spring (307), the plastic jumper (309) tilts around the truncated cones (402, 405) on both sides, and one end of the plastic jumper (309) hits the L-pole conductive sheet (311), so that the normally closed contact (314) connected to the L-pole fixing frame (315) and the L-pole conductive sheet (311) is in a disconnected state.

2. The dry-burning protector as claimed in claim 1, wherein a hollow cylinder (313, 303) extends from the plastic shell (004) above the L-pole conductive sheet (311) and the N-pole conductive sheet (306), the porcelain rod (312, 304) is mounted on the L-pole conductive sheet (311) and the N-pole conductive sheet (306) through the hollow cylinder (313, 303), and a bimetallic strip (101, 104) mounted on the iron frame (102) is provided above the porcelain rod (312, 304).

3. The dry-burning protector as claimed in claim 1 has three protections, namely two bimetallic strips (101, 104) and a plastic jumper (309).

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