Zero crossing detection circuit and air conditioner
A technology of zero-crossing detection circuit and detection unit, which is applied in the field of circuits, can solve problems such as power loss and power consumption, and achieve the effect of avoiding power loss
Inactive Publication Date: 2017-01-25
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
[0004] Embodiments of the present invention provide a zero-crossing detection circuit and an air conditioner, which are used to solve the problem that the zero-crossing detection circuit still generates power loss when the air conditioner is in a standby state, thereby causing unnecessary power consumption
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0020] The transistors used in all the embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics. According to their functions in the circuit, the transistors used in the embodiments of the present invention are mainly switching transistors. Since the source and drain of the switching transistor used here are symmetrical, the source and drain are interchangeable. In the embodime...
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The invention discloses a zero crossing detection circuit and an air conditioner and relates to the technical field of the air conditioner. The zero crossing detection circuit is to solve unnecessary power consumption caused by power loss of the air conditioner in a standby status. The zero crossing detection circuit comprises a voltage dividing unit, a control unit, and a detecting unit; the voltage dividing unit is used for dividing voltage in a loop; the control unit is connected with a first level end, a second level end, a control signal input end, a first node and a second node, so that the first node and the second node are connected or disconnected under control of the control signal input end; the detecting unit is connected with the first node, the second end of a power grid power source, the first level end, the second level end and the detection signal output end, so that voltage on the first level end or the second level end is output from the detection signal output end under control of voltage on the second node and on the second end of the power grid power supply. The zero crossing detection circuit is applicable to air conditioner manufacturing.
Description
technical field [0001] The invention relates to the technical field of circuits, in particular to a zero-crossing detection circuit and an air conditioner. Background technique [0002] With the continuous development of science and technology and the improvement of people's living standards, air conditioners have become one of the indispensable household appliances for people as an indoor cooling tool. Its high-power characteristics also make users have to consider many power-saving factors in use. [0003] Usually, the fan motor in the indoor unit of the air conditioner uses the conduction of the photoelectric thyristor to control the fan speed, and this control method needs to obtain the zero-crossing signal of the AC power as a reference point, so the air conditioner generally includes a Zero-crossing detection circuit. During the working process of the air conditioner, the zero-crossing detection circuit detects the zero-crossing point of the fan motor, and then reali...
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IPC IPC(8): G01R19/175
CPCG01R19/175
Inventor赵怀杰张平张恒
OwnerQINGDAO HISENSE HITACHI AIR CONDITIONING SYST