Over-temperature protection circuit and electric appliance

An over-temperature protection circuit, over-temperature protection technology, applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve the problem that the load cannot resume work, and reduce maintenance costs and applicability. strong effect

Pending Publication Date: 2021-09-07
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem in the prior art that the load cannot resume work when the load temperature returns to normal, the present invention proposes an over-temperature protection circuit and an electrical appliance

Method used

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  • Over-temperature protection circuit and electric appliance

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Embodiment Construction

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] Thus, a feature indicated in this specification will be used to describe one of the features of an embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless oth...

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Abstract

The invention provides an over-temperature protection circuit and an electric appliance. The over-temperature protection circuit comprises a load, a working power supply which supplies power to the load, a switching unit which switches the on-off states of the load and the working power supply, and a control power supply which supplies power to the switching unit. The over-temperature protection circuit further comprises a protection circuit arranged between the switching unit and the control power supply; when the temperature of the load is higher than a preset over-temperature protection point, the protection circuit cuts off the switching unit, so that the switching unit turns off the load; and when the temperature of the load is lower than a preset over-temperature protection point, the protection circuit conducts the switching unit, so that the switching unit starts the load. The load can be turned off when the load is over-temperature, the over-temperature protection function is achieved, and the load can be turned on again when the load returns to the normal temperature, so that the electric appliance runs.

Description

technical field [0001] The invention belongs to the field of electric appliances, in particular to an over-temperature protection circuit and electric appliances. Background technique [0002] With the improvement of living standards, there are more and more electronic products in the home, and at the same time, the safety level of household appliances is also getting higher and higher. For heating loads such as auxiliary heat, overheating is sometimes caused by improper use, and the load will be damaged if it works under overheating conditions for a long time. In the prior art, fuses are usually used in series for protection. When the temperature reaches a certain value, the fuse can be blown and then the load will be turned off. However, when the temperature of the load returns to normal, the circuit will be damaged due to the blown fuse. Cannot be restored to working condition and will require repair before it can be used again. [0003] Therefore, how to design an over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04G01K7/22
CPCH02H5/042G01K7/22
Inventor 侯彬金国华叶唤涛胡冠华方林张元辉
Owner GREE ELECTRIC APPLIANCES INC
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