Wire connection protection device

Patent metadata

Field	Value
Publication number	US-12470054-B2
Application number	US-202318541406-A
Country	US
Kind code	B2
Filing date	Dec 15, 2023
Priority date	Mar 16, 2023
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present application discloses a wire connection protection device of a cooking appliance and an air fryer. The wire connection protection device includes a rigid insulating sleeve sleeved over the connection between the internal wire and power wire of the cooking appliance, with both ends of the rigid insulating sleeve being sleeved over the outside of the outer sheath of the internal wire and the power wire, and a fire sleeve sleeved outside the rigid insulating sleeve. The rigid insulating sleeve improves the structural stability of the connection between the internal wire and the power wire such that it does not loosen easily. The fire sleeve prevents the connection from heating up and catching fire. The rigid insulating sleeve and the fire sleeve collectively insulate the heat source from the inside to prevent the fire from spreading, so as to improve the safety at the wire connection.

First claim

What is claimed is:

1 . The wire connection protection device for a cooking appliance comprising:
a rigid insulating sleeve, adapted to be sleeved outside of a connection between an internal wire and a power wire of said cooking appliance; wherein both ends of the rigid insulating sleeve are sleeved outside of an outer sheath of the internal wire and the power wire; a fire sleeve that is sleeved over the rigid insulating sleeve; and, at least two tightening members that surround the exterior of the fire sleeve in at least two constricted positions of the fire sleeve; wherein the tightening members reduce the inner diameter of the fire sleeve at the at least two constricted positions.

2 . The wire connection protection device according to claim 1 , wherein the rigid insulating sleeve is located between the at least two constricted positions, and the cross-sectional area of middle portion of the fire sleeve between the constricted positions is smaller compared to the cross-sectional area of the at least two constricted positions when the tightening members are contracted.

3 . The wire connection protection device according to claim 1 , wherein the tightening members are strips, and the distance between the tightening members and the end of the fire sleeve is greater than 2 times the width of the tightening members.

4 . The wire connection protection device according to claim 3 , further comprising a connector that connects the internal wire and the power wire.

5 . The wire connection protection device according to claim 3 , wherein the rigid insulating sleeve is comprised of at least one of mica, ceramic, carbon fiber, or glass.

6 . The wire connection protection device according to claim 3 , wherein said cooking appliance has a casing.

7 . The wire connection protection device according to claim 6 , wherein the wire connection protection device is located within the casing at the connection between the internal wire and the power wire.

8 . The wire connection protection device according to claim 7 , further comprising a junction box wherein the wire connection protection device is in a junction box.

9 . The wire connection protection device to claim 7 , further comprising at least two wire connection protection devices that are adapted to be installed at the connection between a live wire of the internal wire and the power wire and at the connection between the ground wire of the internal wire and the power wire.

10 . The wire connection protection device for a cooking appliance comprising:
a casing; an electronic device, disposed within the casing; an internal wire, for connecting one end thereof to the electronic device; a power wire, with one end thereof being connected to the other end of the internal wire, and the other end thereof being used to connect to an external power source; a rigid insulating sleeve, adapted to be sleeved outside of the connection between an internal wire and a power wire of said cooking appliance; wherein both ends of the rigid insulating sleeve are sleeved outside of the outer sheath of the internal wire and the power wire; a fire sleeve that is sleeved over the rigid insulating sleeve; the wire connection protection device being disposed at the connection between the internal wire and the power wire; and, a junction box provided within the casing, with the wire connection protection device provided in the junction box.

11 . The wire connection protection device according to claim 10 , wherein at least two wire connection protection devices are provided, and they are adapted to be installed at the connection between the live wire of the internal wire and the power wire and at the connection between the ground wire of the internal wire and the power wire.

Assignees

• Shenzhen Chenbei Tech Co Ltd

Inventors

• Liu Lei
• Chen Jiajian
• Xu Xiangui
• Yi Xiangyu
• Lin Haoyuan
• Jia xianfeng

Classifications

• H05K5/0247

  Electrical details of casings, e.g. terminals, passages for cables or wiring · CPC title

• H02G15/10

  protected by boxes, e.g. by distribution, connection or junction boxes · CPC title

• H02G15/18 Primary

  protected by sleeves, e.g. for communication cable (two-part covers H02G15/10 {; preforms having internal stresses B29C61/00}) · CPC title