Electric heater protecting method, device and air conditioner
An electric heater and contactor technology, which is applied in the fields of air conditioners, devices, and electric heater protection methods, can solve the problems of long development cycle of new fuses and increase the cost of controllers, so as to improve the reliability of PTC, reduce control costs, Avoid the effect of PTC dry burning
Active Publication Date: 2018-06-19
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
However, to detect the current or voltage of the air conditioner PTC through the circuit requires an additional circuit, which increases the cost of the controller; and for the air conditioner installed on the electric bus, due to the high working voltage of the air conditioner (above DC450V), the manufacturer currently does not have a mature high voltage fuses, and the development cycle of new fuses is relatively long
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[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] figure 1 It is an electric heater protection circuit according to the present invention. In the figure, reference numeral 1 is contactor switch A, 2 is contactor switch B, 3 is electric heater PTC1, 4 is electric heater PTC2, 5 is temperature limiter L1, 6 is temperature limiter L2, 7 is The outlet air temperature T1, 8 is the outlet air temperature T2. ...
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The invention provides an electric heater protecting method, an electric heater protecting device and an air conditioner. The device comprises an air outlet temperature acquisition unit and a controlunit. The air outlet temperature acquisition unit is used for acquiring an outlet air temperature when the air conditioner comprising an electric heater runs at a heating mode; and the control unit isused for determining whether the electric heater runs dry according to the outlet air temperature, and controlling an inner fan of the air conditioner to work according to a predetermined state if the electric heater runs dry. According to the electric heater protecting method, the electric heater protecting device and the air conditioner provided by the invention, the reliability of the electricheater is improved, and the cost in controlling the occurrence of the phenomenon that the electric heater runs dry is reduced.
Description
technical field [0001] The invention relates to the field of circuits, in particular to an electric heater protection method and device and an air conditioner with the electric heater protection device. Background technique [0002] At present, household appliances such as air conditioners, humidifiers, and electric heaters generally use electric heaters with auxiliary heating functions for heating. Generally, the auxiliary electric heating PTC control of air conditioning units adopts an open-loop control method. However, when an abnormal situation occurs, the air conditioner cannot judge the state of the electric heating switch, and the dry burning of the PTC will easily cause the temperature of the surrounding materials to rise, which may cause the overheating and deformation of the whole household appliance, and in severe cases, it will cause safety accidents such as fires caused by spontaneous combustion of sponge materials. If it works under dry burning conditions for a...
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Login to View More IPC IPC(8): F24F11/30F24F13/00F24F110/10
Inventor 梁尤轩沈军赵桓罗祖分
Owner GREE ELECTRIC APPLIANCES INC