Electric heaters and electrical appliances having them

Abstract

This application provides an electric heater and an appliance having the same, including a mounting part, a lead wire, and a fuse. The lead wire is disposed on the mounting part; the fuse has fuse leads; the fuse leads are detachably connected to the mounting part; when the fuse leads are connected to the mounting part, the fuse leads are electrically connected to the lead wire. The electric heater and appliance having the same according to this application improve the detachment and assembly performance of the fuse.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, specifically relating to an electric heater and an electrical appliance having the same. Background Technology

[0002] Currently, the electrical connection of existing PTC electric heaters mainly consists of a plastic cover plate, a fuse, a U-shaped connector, a lead wire, screws, and a plastic base, forming a single unit. It typically uses the U-shaped connector to crimp the fuse to the lead wire, fixing both ends of the fuse to the lead wire. A small plastic plate is then used to press it firmly, and finally, screws are used for final fixation. While this method ensures the fuse's tightness, it also significantly limits its assembly and disassembly capabilities.

[0003] During electrical safety testing, one component is the electric heating dry-burning experiment. This experiment involves setting the indoor temperature to 20℃~25℃, disconnecting the pipe temperature sensor, short-circuiting the temperature limiter, and closing the air guide plate to disable all loads. Power is then supplied solely to the electric heating element at 0.85 times and 1.1 times the rated voltage, respectively, until the thermal fuse blows and the electric heating stops working. Therefore, this experiment requires replacing the blown fuse in the PTC electric heating element with a new one, and then testing twice in the same manner. Due to the difficulty in disassembling and assembling the fuse, each disassembly and reassembly takes more than an hour, severely impacting work efficiency.

[0004] Therefore, how to provide an electric heater that can improve the disassembly and assembly performance of fuses, as well as an electrical appliance incorporating such a heater, has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide an electric heater and an electrical appliance having the same, which can improve the disassembly and assembly performance of the fuse.

[0006] To address the aforementioned problems, this application provides an electric heater, comprising:

[0007] Installation Department;

[0008] Lead wires are provided on the mounting section;

[0009] A fuse; the fuse has fuse leads; the fuse leads are detachably connected to the mounting part; when the fuse leads are connected to the mounting part, the fuse leads are electrically connected to the lead wires.

[0010] Preferably, the electric heater further includes a snap-fit ​​component that can snap-fit ​​with the fuse pin; when the snap-fit ​​component snaps with the fuse pin, the fuse is electrically connected to the lead wire.

[0011] Preferably, the snap-fit ​​component includes a conductor; the conductor is disposed on the mounting portion; the conductor is connected to the lead wire.

[0012] Preferably, the mounting part includes an insulating block; a groove is provided inside the insulating block; and a snap-fit ​​component is located inside the groove.

[0013] Preferably, the insulating block is provided with a connection port; the connection port communicates with the groove; the fuse pin can enter and exit the groove through the connection port to engage or disengage with the snap-fit ​​component.

[0014] Preferably, the snap-fit ​​component can undergo elastic deformation; the snap-fit ​​component is provided with a snap-fit ​​interface; in its natural state, the snap-fit ​​interface and the connection port are offset, and the snap-fit ​​interface and the fuse pin can snap-fit; when the snap-fit ​​component deforms to its elastic limit, the snap-fit ​​interface and the connection port are aligned, and the fuse pin can enter and exit the snap-fit ​​interface.

[0015] Preferably, the insulating block is provided with a push port; the push port is connected to the groove; the push part can push the snap-fit ​​member through the push port, so that the snap-fit ​​member deforms to the elastic limit, so that the fuse pin can enter and exit the snap-fit ​​interface.

[0016] Preferably, the groove is an annular groove; the snap-fit ​​component includes a first part, a second part, and a third part that are bent or folded in sequence; the snap-fit ​​interface is disposed on the third part; the first part passes through the snap-fit ​​interface; an annular structure is formed between the first part, the second part, and the third part; the annular structure is arranged circumferentially around the annular groove.

[0017] Preferably, the insulating block is further provided with a first limiting groove; the first limiting groove is connected to the annular groove; the first part is located in the first limiting groove;

[0018] And / or, a second limiting groove is also provided inside the insulating block; the second limiting groove is connected to the annular groove; the third part is located inside the second limiting groove.

[0019] Preferably, the insulating block is provided with a wire-passing hole that connects to the groove, and the lead wire enters the groove through the wire-passing hole.

[0020] According to another aspect of this application, an electrical appliance is provided, including an electric heater, wherein the electric heater is the electric heater described above.

[0021] The electric heater and the electrical appliance having the same provided in this application have leads disposed on the mounting part, and the fuse pins are detachably connected to the mounting part, separating the fuse from the power supply leads, making the fuse a separately detachable component, thereby improving the efficiency of fuse assembly and disassembly, allowing for convenient replacement at any time, and improving the fuse assembly and disassembly performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the electric heater according to an embodiment of this application;

[0023] Figure 2This is a schematic diagram of the installation part according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the installation part according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the electric heater according to an embodiment of this application.

[0026] The reference numerals in the attached figures are as follows:

[0027] 1. Mounting part; 11. Groove; 12. Connection port; 13. Push port; 14. First limiting groove; 15. Second limiting groove; 16. Wire hole; 2. Lead wire; 3. Fuse; 31. Fuse lead; 4. Snap-fit ​​part; 41. First part; 42. Second part; 43. Third part; 431. Snap-fit ​​interface; 5. Pushing part; 6. Insulating base; 7. Insulating cover plate; 71. Protrusion. Detailed Implementation

[0028] See also Figure 1 As shown in the embodiment of this application, an electric heater includes a mounting part 1, a lead wire 2, and a fuse 3. The lead wire 2 is disposed on the mounting part 1. The fuse 3 has a fuse pin 31. The fuse pin 31 is detachably connected to the mounting part 1. When the fuse pin 31 is connected to the mounting part 1, the fuse pin 31 is electrically connected to the lead wire 2, separating the fuse 3 from the power lead wire 2. This makes the fuse 3 a separately detachable component, thereby improving the disassembly and assembly efficiency of the fuse 3 and allowing for convenient replacement at any time, thus improving the disassembly and assembly performance of the fuse 3. This results in high disassembly and replacement efficiency of the fuse 3 in PTC electric heating and high efficiency in dry-burning experiments of PTC electric heating.

[0029] This application also discloses some embodiments, in which the electric heater further includes a snap-fit ​​component 4, which can snap-fit ​​with the fuse pin 31; when the snap-fit ​​component 4 snaps with the fuse pin 31, the fuse 3 is electrically connected to the lead wire 2, and the fuse 3 can be disassembled and replaced in the fastest and most convenient way without affecting the normal connection and use of the fuse 3 and the lead wire 2.

[0030] This application also discloses some embodiments in which the snap-fit ​​component 4 includes a conductor; the conductor is disposed on the mounting portion 1; the conductor is connected to the lead wire 2. The conductor can be a conductive metal sheet such as an iron sheet, so that the snap-fit ​​portion has both snap-fit ​​and conductive properties.

[0031] This application also discloses some embodiments, in which the mounting part 1 includes an insulating block; a groove 11 is provided inside the insulating block; and a snap-fit ​​member 4 is located inside the groove 11. The insulating block is a block-shaped structure made of a material with good insulation and high hardness, such as a plastic block.

[0032] This application also discloses some embodiments in which a connection port 12 is provided on the insulating block; the connection port 12 communicates with the groove 11; the fuse pin 31 can enter and exit the groove 11 through the connection port 12 to engage or disengage with the snap-fit ​​member 4.

[0033] This application also discloses some embodiments in which the snap-fit ​​component 4 can undergo elastic deformation; the snap-fit ​​component 4 is provided with a snap-fit ​​interface 431; when the snap-fit ​​component 4 is in its natural state, the snap-fit ​​interface 431 is offset from the position of the connection port 12, and the snap-fit ​​interface 431 can be snapped into the fuse pin 31; when the snap-fit ​​component 4 deforms to its elastic limit, the snap-fit ​​interface 431 corresponds to the position of the connection port 12, and the fuse pin 31 can enter and exit the snap-fit ​​interface 431.

[0034] See also Figure 2-3 As shown, this application also discloses some embodiments, in which a push port 13 is provided on the insulating block; the push port 13 is connected to the groove 11; the push part 5 can push the snap-fit ​​member 4 through the push port 13, so that the snap-fit ​​member 4 deforms to its elastic limit, so that the fuse pin 31 can enter and exit the snap-fit ​​interface 431. The push part 5 can be a flathead screwdriver or other similar hard object. The connection port 12 and the push port 13 are both located on the same surface of the insulating block; the snap-fit ​​interface 431 moves between the connection port 12 and the push port 13.

[0035] This application also discloses some embodiments, wherein the groove 11 is an annular groove; the snap-fit ​​member 4 includes a first part 41, a second part 42 and a third part 43 connected by bending or folding in sequence; the snap-fit ​​interface 431 is disposed on the third part 43; the first part 41 passes through the snap-fit ​​interface 431; an annular structure is formed between the first part 41, the second part 42 and the third part 43; the annular structure is arranged circumferentially around the annular groove.

[0036] This application also discloses some embodiments, in which a first limiting groove 14 is provided inside the insulating block; the first limiting groove 14 is connected to the annular groove; the first part 41 is located inside the first limiting groove 14;

[0037] The insulating block is also provided with a second limiting groove 15; the second limiting groove 15 is connected to the annular groove; the third part 43 is located in the second limiting groove 15.

[0038] like Figure 2 As shown, after the iron sheet, i.e. the snap-fit ​​part, is bent or folded, the first part 41 at the upper end of the iron sheet extends and is snapped into the first limiting groove 14, fixing the iron sheet in the insulating block. At this time, the iron sheet is in its natural state, and the snap-fit ​​interface 431 is in the right extreme position, that is, the leftmost side of the snap-fit ​​interface 431 coincides with the first part 41 of the iron sheet that passes through. The connection port 12 corresponds to the solid part at the left end of the iron sheet, that is, the connection port 12 is offset from the snap-fit ​​interface 431.

[0039] like Figure 3As shown, if it is necessary to install the fuse pin 31, insert the pushing part 5 into the pushing port 13. By pressing the rightmost end of the iron sheet with the pushing part 5, the locking part 4 can be deformed to its elastic limit, that is, the rightmost side of the locking interface 431 coincides with the iron sheet that has passed through. At this time, the position of the locking interface 431 corresponds to that of the connecting port 12. The fuse pin 31 can be inserted into the groove 11 inside the insulating block through the connecting port 12 and then through the locking interface 431. Then, the pushing part 5 is removed. Since the deformation of the iron sheet is not large, it will return to its original position under the action of elasticity. Figure 2 In this state, the card interface 431 and the iron plate can firmly hold the fuse pin 31 in place. The iron plate maintains the conductive connection between the fuse 3 and the power lead 2, and also effectively fixes the fuse 3.

[0040] The snap-fit ​​method of this application replaces the U-shaped contact clip fixing method in the prior art, separating the fuse 3 from the power lead 2. This makes the fuse 3 a component that can be disassembled and installed independently, thereby improving the efficiency of fuse 3 disassembly and installation. It can be replaced conveniently at any time, and the time spent on each replacement is only about 10 minutes, compared to the original 1 hour, which is a 600% improvement in replacement efficiency. Because the efficiency of replacing fuse 3 is greatly improved, the time required for each dry burning test in electrical safety is reduced from the original 2 hours to less than 1 hour, which is an improvement in efficiency of about 100%.

[0041] This application also discloses some embodiments in which a wire-passing hole 16 is provided on the insulating block, which is connected to the groove 11. The lead wire 2 enters the groove 11 through the wire-passing hole 16. The wire-passing hole 16 can be located at the lower right corner of the insulating block. The wire-passing hole 16 extends directly from the lower end of the snap-fit ​​part 4, i.e. the iron sheet, to the outside of the right surface of the insulating block, so that the power lead wire 2 can directly reach the lower end of the iron sheet through the wire-passing hole 16. It is necessary to weld and fix the power lead wire 2 to the iron sheet in advance and maintain a certain elastic force to ensure that the iron sheet will not loosen when it is squeezed.

[0042] The electric heater of this application consists of an insulating base 6, an insulating cover plate 7, a mounting part 1, a fuse 3, a power lead 2, an iron sheet (i.e., a snap-fit ​​part), screws, and other components; the insulating base plate is a plastic base plate; the insulating cover plate 7 is a plastic cover plate. The base part is mainly composed of a plastic base, a fuse 3, a mounting part 1, and a power lead 2; the cover part is formed by an insulating block and an insulating cover plate 7. The insulating cover plate 7 is provided with a protrusion 71, which can fix the fuse 3 on the base and keep the fuse 3 in a fixed position; the insulating block has a groove inside, and the snap-fit ​​part is placed in the groove 11, which can ensure that the snap-fit ​​connection block will not flip or move, thus ensuring the stability of the device.

[0043] According to an embodiment of this application, an electrical appliance is provided, including an electric heater, which is the electric heater described above. The electric heater is a PTC heater.

[0044] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An electric heater, characterized in that, include: Installation section (1); Lead wire (2), said lead wire (2) is disposed on the mounting part (1); A fuse (3); the fuse (3) has a fuse pin (31); the fuse pin (31) is detachably connected to the mounting part (1); when the fuse pin (31) is connected to the mounting part (1), the fuse pin (31) is electrically connected to the lead wire (2); The electric heater also includes a snap-fit ​​component (4), which can snap-fit ​​with the fuse pin (31). One end of the lead wire (2) is fixedly connected to the snap-fit ​​component (4), and the other end of the lead wire extends out of the mounting part (1). When the snap-fit ​​component (4) snaps with the fuse pin (31), the fuse (3) is electrically connected to the lead wire (2). The mounting part (1) includes an insulating block. A groove (11) is provided in the insulating block. The snap-fit ​​component (4) is located in the groove (11). A connection port (12) is provided on the insulating block. The connection port (12) communicates with the groove (11). The fuse pin (31) can enter and exit the groove (11) through the connection port (12) to snap-fit ​​with or separate from the snap-fit ​​component (4). The snap-fit ​​component (4) is elastically deformable. The snap-fit ​​component (4) is provided with a snap-fit ​​interface (431). When the snap-fit ​​component (4) deforms to its elastic limit, the snap-fit ​​interface (431) corresponds to the position of the connection port (12), and the fuse pin (31) can enter and exit the snap-fit ​​interface (431). When the snap-fit ​​component (4) is in its natural state, the snap-fit ​​interface (431) is offset from the position of the connection port (12), and the snap-fit ​​interface (431) can be snapped into the fuse pin (31).

2. The electric heater according to claim 1, characterized in that, The snap-fit ​​component (4) includes a conductor; the conductor is disposed on the mounting portion (1); the conductor is connected to the lead wire (2).

3. The electric heater according to claim 1, characterized in that, The insulating block is provided with a push port (13); the push port (13) is connected to the groove (11); the push part (5) can push the snap-fit ​​member (4) through the push port (13) so that the snap-fit ​​member (4) deforms to the elastic limit so that the fuse pin (31) can enter and exit the card interface (431).

4. The electric heater according to claim 3, characterized in that, The groove (11) is an annular groove; the snap-fit ​​component (4) includes a first part (41), a second part (42), and a third part (43) that are bent or folded in sequence; the snap-fit ​​interface (431) is disposed on the third part (43); the first part (41) passes through the snap-fit ​​interface (431); an annular structure is formed between the first part (41), the second part (42), and the third part (43); the annular structure is arranged circumferentially around the annular groove.

5. The electric heater according to claim 4, characterized in that, The insulating block is also provided with a first limiting groove (14); the first limiting groove (14) is connected to the annular groove; the first part (41) is located in the first limiting groove (14); And / or, the insulating block is further provided with a second limiting groove (15); the second limiting groove (15) is connected to the annular groove; the third part (43) is located in the second limiting groove (15).

6. The electric heater according to claim 1, characterized in that, The insulating block is provided with a wire-passing hole (16) that communicates with the groove (11), and the lead wire (2) enters the groove (11) through the wire-passing hole (16).

7. An electrical appliance, comprising an electric heater, characterized in that, The electric heater is the electric heater according to any one of claims 1-6.

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