CN104425184A - Control device for switching on and switching off relay and air conditioner - Google Patents
Control device for switching on and switching off relay and air conditioner Download PDFInfo
- Publication number
- CN104425184A CN104425184A CN201310547174.5A CN201310547174A CN104425184A CN 104425184 A CN104425184 A CN 104425184A CN 201310547174 A CN201310547174 A CN 201310547174A CN 104425184 A CN104425184 A CN 104425184A
- Authority
- CN
- China
- Prior art keywords
- relay
- zero
- control device
- control unit
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 abstract description 19
- 238000010521 absorption reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
Landscapes
- Relay Circuits (AREA)
Abstract
The invention discloses a control device for switching on and switching off a relay and an air conditioner. The control device for switching on and switching off the relay comprises a control unit, a power supply and a relay, wherein the power supply is electrically connected with the relay; a zero-cross detection circuit is connected in parallel between the power supply and the relay and is used for detecting a zero-cross signal of the power supply and transmitting the zero-cross signal to the control unit; the control unit is connected with the signal input end of the relay and is used for switching on or switching off the relay according to the zero-cross signal. According to the control device for switching on and switching off the relay, the zero-cross signal is detected; the relay matched with inductive load is controlled when the power supply cross the zero point, so that the peak voltage generated when the relay is switched on and off can be greatly reduced; meanwhile, according to the control device, a resistance-capacitance absorbing circuit can also be omitted; the miniaturization of a computer board can be facilitated; the cost can be lowered.
Description
Technical Field
The invention relates to the field of relay control, in particular to a relay on-off control device and an air conditioner.
Background
In the prior art, the loads controlled by the air conditioner computer board can be generally divided into two types, namely inductive loads and resistive loads; the main type of the resistive load is a heating belt; the main types of inductive loads are electromagnetic valves, alternating current contactors, alternating current fans and the like.
Generally, a low-voltage relay controls a strong inductive load, but peak voltage is generated in the process of attracting and disconnecting the relay, and in order to reduce the peak voltage value, a resistance-capacitance absorption loop is generally adopted for matching. The specific control circuit is shown in fig. 1, one end of the relay is connected with a live wire, the other end of the relay is connected with a current input port of an inductive load, the resistance-capacitance absorption loop is connected with the relay in parallel, one end of the resistance-capacitance absorption loop is connected with the live wire, the other end of the resistance-capacitance absorption loop is connected with the current input port of the inductive load, the relay controls the inductive load to be disconnected through disconnection or connection, when the relay is disconnected or connected, spike voltage can be generated, and the resistance-capacitance absorption loop is used for reducing the spike.
However, the above scheme has the following problems:
because the resistance-capacitance loops are added at two ends of the load, the resistance-capacitance loops occupy more space of a computer board in consideration of factors such as creepage distance and the like, the development direction of the air conditioning unit is miniaturization and convenient to install at present, the miniaturization of the unit is developed, the requirement for the size reduction of the electric control box body is determined, and the size of the computer board must be reduced; but the existence of the resistance-capacitance loop hinders the miniaturization development of the computer board.
In view of the above problems, a new relay on/off control device and an air conditioner are needed.
Disclosure of Invention
The invention aims to provide a relay on/off control device which can reduce peak voltage caused when a relay controls an inductive load.
The control device can also remove a resistance-capacitance absorption hardware loop, and is beneficial to the miniaturization and cost reduction of the computer board.
Another object of the present invention is to provide an air conditioner having the above relay on/off control device, which can reduce the peak voltage caused by the relay controlling the inductive load to be turned on or off.
The air conditioner can also remove a resistance-capacitance absorption loop, and is beneficial to the miniaturization and cost reduction of the computer board in the air conditioner.
In order to achieve the purpose, the invention adopts the following technical scheme:
a relay closing and opening control device comprising:
a control unit, a power supply and a relay;
the power supply is electrically connected with the relay, and a zero-crossing detection loop is connected in parallel between the power supply and the relay; the zero-crossing detection loop detects a zero-crossing signal of the power supply and transmits the zero-crossing signal to the control unit;
the control unit is connected with the signal input end of the relay and controls the relay to be opened or closed according to the zero-crossing signal.
Preferably, the zero crossing signal is confirmed as a valid signal when the control unit detects that the level generated by the zero crossing point detecting circuit reaches a rising edge or a falling edge and maintains at least the first preset time T1.
Preferably, the control unit controls the relay to be opened or closed when the relay is required to be opened or closed within a second preset time T2 after the control unit confirms that the zero-crossing signal is a valid signal.
Preferably, the first preset time T1 is 500 us; the second preset time T2 is 500 us.
Preferably, the relay is used for controlling the inductive load, a current input end of the relay is connected with the live wire, a current output end of the relay is connected with a current input end of the inductive load, and a current output end of the inductive load is connected with the zero line.
Preferably, the zero-crossing detection circuit includes: the circuit comprises a photoelectric coupler, a rectifier diode and a first current-limiting resistor;
the photoelectric coupler consists of a light emitting diode and a photosensitive triode; wherein,
the anode of the light emitting diode is connected with a live wire, and the cathode of the light emitting diode is connected with a zero line;
the first current limiting resistor is connected between the live wire and the anode of the light emitting diode;
the rectifier diode is connected with the light-emitting diode in parallel, the anode of the rectifier diode is connected with a zero line, and the cathode of the rectifier diode is connected with a live line;
the collector of the phototriode is connected with a power supply voltage Vcc and is used for being started when the light-emitting diode is started and closed when the light-emitting diode is closed;
the emitter of the phototriode is connected with the pulse output end;
and the emitter of the phototriode is also connected with a grounding end.
Preferably, the zero-crossing detection circuit further includes:
a second current limiting resistor and a filter capacitor;
the second current-limiting resistor is connected in series between the collector of the phototriode and the pulse output end;
the filter capacitor is connected in series between the emitter of the phototriode and the pulse output end.
Preferably, the zero-crossing detection circuit further includes:
and the pull-up resistor is connected between the collector of the phototriode and the power supply voltage Vcc in series.
Preferably, the zero-crossing detection circuit further includes:
and the pull-down resistor is connected between the emitter and the ground terminal of the phototriode in series.
An air conditioner is provided with the relay closing and opening control device.
The invention has the beneficial effects that: the invention provides a relay on/off control device and an air conditioner, wherein the relay on/off control device comprises: a zero-crossing detection loop and a control unit; the zero-crossing detection circuit comprises a live wire input end, a zero line input end and a pulse output end, wherein the live wire input end is connected with the live wire, the zero line input end is connected with the zero line, and the pulse output end is connected with the control unit and used for outputting a pulse signal to the control unit; the control unit is also connected with the signal input end of the relay, carries out zero-crossing signal detection of the power supply according to the received pulse signal, and controls the relay to be opened or closed when the zero-crossing point of the power supply is detected and the relay needs to be controlled. The scheme controls the relay matched with the inductive load when the power supply crosses zero through detecting the power supply zero-crossing signal, so that the peak voltage generated when the relay is closed or opened can be greatly reduced. And this scheme can also get rid of resistance-capacitance absorption return circuit, does benefit to the miniaturization and the reduce cost of computer board.
Drawings
FIG. 1 is a circuit diagram of a prior art closing and opening control circuit for a relay with a RC snubber circuit;
fig. 2 is a schematic structural diagram of a relay closing and opening control device according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a preferred embodiment of a zero crossing detection loop according to the present invention;
FIG. 4 is a circuit diagram of another preferred embodiment of the zero crossing detection circuit provided in the embodiment of the present invention;
fig. 5 is an operation timing diagram of a zero-crossing detection circuit according to an embodiment of the present invention.
Wherein:
1: a zero-crossing detection loop; 2: a control unit; 3: a relay; 4: an inductive load;
11: a photoelectric coupler; 12: a pulse output end;
111: a light emitting diode; 112: a phototriode.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Fig. 2 is a schematic structural diagram of a relay closing and opening control device according to an embodiment of the present invention. As shown in fig. 2, the relay closing and opening control apparatus includes: zero cross detection circuit 1, control unit 2, power and relay 3. The power supply is electrically connected with the relay 3, and a zero-crossing detection loop 1 is connected in parallel between the power supply and the relay 3; the zero-crossing detection circuit 1 detects a zero-crossing signal of the power supply and transmits the zero-crossing signal to the control unit 2; the control unit 2 is connected with the signal input end of the relay 3, and controls the relay 3 to be opened or closed according to the zero-crossing signal.
Specifically, zero cross detection circuit 1 includes live wire input end, zero line input end and pulse output end, the power live wire is connected to the live wire input end, the zero line input end is connected with the zero line, the pulse output end links to each other with control unit 2 for to control unit 2 output pulse signal. When the control unit 2 detects a zero-crossing signal of the power supply and the relay 3 needs to be opened or closed again, the control unit 2 controls the relay 3 to be opened or closed.
The relay 3 is used for controlling the inductive load 4, the current input end of the relay 3 is connected with the live wire, the current output end of the relay 3 is connected with the current input end of the inductive load 4, and the current output end of the inductive load 4 is connected with the zero line.
In this embodiment, the inductive load 4 may be a solenoid valve, an ac contactor, an ac fan, or the like.
In this embodiment, the control unit 2 is preferably an mcu (microcontrollerunit), which is named as a multi-point control unit and is also called a microcomputer.
In operation, the zero crossing detection circuit 1 sends a pulse signal to the control unit 2, the control unit 2 detects the received pulse signal, and when the control unit 2 detects that the level generated by the zero crossing detection circuit 1 reaches a rising edge or a falling edge, the control unit continues to detect at least a first preset time T1 to confirm that the zero crossing signal is a valid signal. When the relay 3 needs to be opened or closed within a second preset time T2 after the control unit 2 confirms that the zero-crossing signal is a valid signal, the control unit 2 controls the relay 3 to be opened or closed. If the relay 3 needs to be controlled after the second preset time T2, it needs to wait until the next zero-crossing signal comes to operate. The relay 3 controls the inductive load 4 by opening or closing.
In this embodiment, preferably, the first predetermined time T1 is 500 us; the second preset time T2 is 500 us. Of course, the first preset time T1 and the second preset time T2 may be other values, which are determined according to actual needs.
Fig. 3 is a circuit diagram of a preferred mode of the zero-crossing detection circuit according to the embodiment of the present invention. As shown in fig. 3, the zero-cross detection circuit 1 includes: the photoelectric coupler 11, rectifier diode D12, first current limiting resistance R20. The photocoupler 11 is composed of a light emitting diode 111 and a phototriode 112.
The anode of the light emitting diode 111 is connected with the live wire, and the cathode is connected with the zero wire.
The first current limiting resistor R20 is connected between the hot line and the anode of the led 111. The first current limiting resistor R20 has a larger resistance value, and is used to limit the current, so as to protect the photocoupler 11 from normal operation.
The rectifier diode D12 is connected in parallel with the light emitting diode 111, and has an anode connected to the neutral line and a cathode connected to the live line. The rectifier diode D12 has the following effects: in the case of sine alternating current of negative half-cycle (live line voltage U)L＜UN) The light emitting diode 111 in the photocoupler 11 is prevented from being reverse-broken down.
The collector of the phototransistor 112 is connected to a supply voltage Vcc for turning on when the light emitting diode is turned on and turning off when the light emitting diode is turned off.
The emitter of the phototransistor 112 is connected to the pulse output terminal 12, and the emitter of the phototransistor 112 is further connected to the ground terminal. The pulse output terminal 12 is used for outputting a signal when the phototransistor 112 is turned on and stopping outputting the signal when the phototransistor 112 is turned off. The pulse signal output by the pulse output terminal 12 will flow to the control unit 2.
In this embodiment, the zero-cross detection circuit 1 further preferably includes a pull-up resistor R21, or the pull-up resistor R21 is connected in series between the collector of the phototransistor 112 and the power supply voltage Vcc, and the pull-down resistor is connected in series between the emitter of the phototransistor 112 and the ground terminal.
Specifically, the pull-up resistor R21 and the pull-down resistor are used for limiting the current flowing through the phototriode when the phototriode is turned on, so as to prevent the phototriode from being damaged due to the excessive current.
Fig. 4 is a circuit diagram of another preferred mode of the zero-crossing detection circuit according to the embodiment of the present invention. As shown in fig. 4, the zero-crossing detection circuit provided in this embodiment is different from the zero-crossing detection circuit provided in fig. 3 in that: the zero-cross detection circuit 1 further includes: a second current limiting resistor R22 and a filter capacitor C13.
The second current limiting resistor R22 is connected in series between the collector of the phototransistor 112 and the pulse output terminal 12. The second current limiting resistor R22 functions to limit current.
The filter capacitor C13 is connected in series between the emitter of the phototransistor 112 and the pulse output terminal 12. The filter capacitor C13 functions as a filter.
Fig. 5 is an operation timing diagram of a zero-crossing detection circuit according to an embodiment of the present invention. As shown in FIG. 5, during the negative half cycle of the sinusoidal AC power (line voltage U)L＜UN) The light emitting diode 111 is turned off, the phototransistor 112 is not turned on, and the pulse output terminal 12 does not output a pulse signal. In the positive half cycle of sinusoidal alternating current (voltage U of live wire)L＞UN) The light emitting diode 111 is turned on to emit light, the phototriode 112 is excited to be turned on at the moment, the pulse output end 12 outputs a pulse signal and sends the pulse signal to the control unit 2, and the signal finally obtained by the control unit 2 is a square wave signal and can accurately reflect the zero crossing point of the sine alternating current.
After the control unit 2 is powered on, a zero-crossing signal acquired and transmitted from a 220V/AC power supply by a zero-crossing detection circuit can be received, after the control unit 2 receives the zero-crossing signal, when the control unit detects that a zero-crossing detection circuit generates a rising edge or a falling edge level change, the control unit continuously detects a first preset time T1 (500 us), after the level state is confirmed to be correct, the relay control is enabled to be effective, and when the relay needs to be controlled to be opened and closed, the relay is completed within a second preset time T2 (500 us). If the relay needs to be controlled after the second preset time T2, the relay needs to be controlled to be closed and opened when the next zero-crossing signal arrives.
When a pull-up resistor R21 is connected in series between the collector of the phototriode 112 and the power supply voltage Vcc, and the phototriode 112 is conducted, the pulse signal output by the pulse output end 12 is a low level signal; when a pull-down resistor is connected in series between the emitter and the ground of the phototransistor 112, and the phototransistor 112 is turned on, the pulse signal output by the pulse output terminal 12 is a high level signal.
The key point of the invention is that the inherent zero crossing point characteristic of the alternating current power supply is utilized, the theoretical voltage value is 0 at the moment, the attraction and disconnection control of the relay is carried out at the zero crossing point, the generated peak voltage is minimum, and a resistance-capacitance absorption loop can be removed, thereby being beneficial to the miniaturization of a computer board.
The invention also provides an air conditioner, wherein the air conditioner is provided with the relay closing and opening control device.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A relay closing and opening control device, comprising:
a control unit (2), a power supply and a relay (3);
the power supply is electrically connected with the relay (3), and a zero-crossing detection loop (1) is connected in parallel between the power supply and the relay (3); the zero-crossing detection circuit (1) detects a zero-crossing signal of the power supply and transmits the zero-crossing signal to the control unit (2);
the control unit (2) is connected with a signal input end of the relay (3), and the relay (3) is controlled to be opened or closed according to the zero-crossing signal.
2. The relay closing and opening control device according to claim 1, wherein the zero crossing signal is confirmed as a valid signal when the control unit (2) detects that the level generated by the zero crossing point detection circuit (1) reaches a rising edge or a falling edge and maintains at least a first preset time T1.
3. The relay closing and opening control device according to claim 2, wherein the control unit (2) controls the relay (3) to open or close when the relay (3) is required to open or close within a second preset time T2 after the control unit (2) confirms that the zero-crossing signal is a valid signal.
4. The relay closing and opening control device according to claim 3, wherein the first preset time T1 is 500 us; the second preset time T2 is 500 us.
5. Relay closing and opening control device according to claim 1, characterized in that the zero-crossing detection circuit (1) comprises: the photoelectric coupler (11), a rectifier diode and a first current limiting resistor;
the photoelectric coupler (11) consists of a light emitting diode (111) and a phototriode (112); wherein,
the anode of the light-emitting diode (111) is connected with a live wire, and the cathode of the light-emitting diode is connected with a zero line;
the first current limiting resistor is connected between the live wire and the anode of the light emitting diode;
the rectifier diode is connected with the light-emitting diode (111) in parallel, the anode of the rectifier diode is connected with a zero line, and the cathode of the rectifier diode is connected with a live line;
the collector of the phototriode (112) is connected with a power supply voltage Vcc and is used for being switched on when the light-emitting diode is switched on and switched off when the light-emitting diode is switched off;
the emitter of the phototriode (112) is connected with the pulse output end (12);
the emitter of the phototriode (112) is also connected with the ground terminal.
6. Relay closing and opening control device according to claim 5, characterized in that the zero crossing detection circuit (1) further comprises:
a second current limiting resistor and a filter capacitor;
the second current-limiting resistor is connected in series between the collector of the phototriode (112) and the pulse output end (12);
the filter capacitor is connected in series between the emitter of the phototriode (112) and the pulse output end (12).
7. Relay closing and opening control device according to claim 5, characterized in that the zero crossing detection circuit (1) further comprises:
a pull-up resistor connected in series between the collector of the phototransistor (112) and the supply voltage Vcc.
8. Relay closing and opening control device according to claim 5, characterized in that the zero crossing detection circuit (1) further comprises:
and the pull-down resistor is connected between the emitter and the ground terminal of the phototriode (112) in series.
9. An air conditioner characterized by having the relay on/off control device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310547174.5A CN104425184A (en) | 2013-08-23 | 2013-11-06 | Control device for switching on and switching off relay and air conditioner |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103745859 | 2013-08-23 | ||
| CN201310374585 | 2013-08-23 | ||
| CN201310547174.5A CN104425184A (en) | 2013-08-23 | 2013-11-06 | Control device for switching on and switching off relay and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104425184A true CN104425184A (en) | 2015-03-18 |
Family
ID=52973888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310547174.5A Pending CN104425184A (en) | 2013-08-23 | 2013-11-06 | Control device for switching on and switching off relay and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104425184A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469629A (en) * | 2015-08-19 | 2017-03-01 | 艾默生电气公司 | Self study relay turns off control system and method |
| CN107257590A (en) * | 2017-06-16 | 2017-10-17 | 广东美的厨房电器制造有限公司 | control method and cooking appliance |
| CN108278743A (en) * | 2017-12-21 | 2018-07-13 | 青岛海尔科技有限公司 | The communicating circuit and the means of communication of convertible frequency air-conditioner |
| CN108592182A (en) * | 2018-03-28 | 2018-09-28 | 海信科龙电器股份有限公司 | Control circuit of indoor unit in air conditioner, control method of control circuit and air conditioner |
| CN109742993A (en) * | 2019-03-04 | 2019-05-10 | 珠海格力电器股份有限公司 | Circuit and method for preventing short circuit of alternating current fan and alternating current fan |
| CN109936202A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN110113037A (en) * | 2019-05-27 | 2019-08-09 | 深圳和而泰小家电智能科技有限公司 | Super-zero control circuit and electronic equipment |
| CN110797232A (en) * | 2019-09-26 | 2020-02-14 | 深圳市和玛科技有限公司 | Control method and circuit for preventing relay from being bonded |
| CN111431140A (en) * | 2020-02-25 | 2020-07-17 | 珠海格力电器股份有限公司 | Control method and device of control system, storage medium and electric appliance |
| CN111486570A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Control circuit, indoor unit, air conditioner and control method |
| CN112146253A (en) * | 2020-09-23 | 2020-12-29 | 海信（山东）空调有限公司 | Air conditioner and compressor control method thereof |
| CN112444720A (en) * | 2019-08-30 | 2021-03-05 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method of electric control device |
| CN112702810A (en) * | 2020-12-31 | 2021-04-23 | 广东美的厨房电器制造有限公司 | Control method and device of microwave oven and microwave oven |
| CN113107826A (en) * | 2021-04-14 | 2021-07-13 | 珠海拓芯科技有限公司 | Compressor start-stop control method and circuit and air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003767A (en) * | 2009-09-02 | 2011-04-06 | 珠海格力电器股份有限公司 | Control method and device for auxiliary electric heating of air conditioner |
| CN102287889A (en) * | 2010-06-18 | 2011-12-21 | 苏州三星电子有限公司 | Air-conditioner standby regulating device |
| CN102878651A (en) * | 2012-10-16 | 2013-01-16 | 四川长虹电器股份有限公司 | Intelligent inverter air conditioner with low standby power |
| CN102890184A (en) * | 2012-10-25 | 2013-01-23 | 德讯科技股份有限公司 | Zero-crossing detection circuit based on optocoupler |
| CN202917398U (en) * | 2012-10-22 | 2013-05-01 | 厦门市芯阳科技有限公司 | Self-adjusting zero-crossing control circuit for electromagnetic relay |
| CN103092089A (en) * | 2011-10-31 | 2013-05-08 | 三科电器集团有限公司 | Zero potential on-off control system |
| CN202975135U (en) * | 2012-12-29 | 2013-06-05 | 宁波舜韵电子有限公司 | Zero-cross detection circuit with low standby power consumption |
-
2013
- 2013-11-06 CN CN201310547174.5A patent/CN104425184A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003767A (en) * | 2009-09-02 | 2011-04-06 | 珠海格力电器股份有限公司 | Control method and device for auxiliary electric heating of air conditioner |
| CN102287889A (en) * | 2010-06-18 | 2011-12-21 | 苏州三星电子有限公司 | Air-conditioner standby regulating device |
| CN103092089A (en) * | 2011-10-31 | 2013-05-08 | 三科电器集团有限公司 | Zero potential on-off control system |
| CN102878651A (en) * | 2012-10-16 | 2013-01-16 | 四川长虹电器股份有限公司 | Intelligent inverter air conditioner with low standby power |
| CN202917398U (en) * | 2012-10-22 | 2013-05-01 | 厦门市芯阳科技有限公司 | Self-adjusting zero-crossing control circuit for electromagnetic relay |
| CN102890184A (en) * | 2012-10-25 | 2013-01-23 | 德讯科技股份有限公司 | Zero-crossing detection circuit based on optocoupler |
| CN202975135U (en) * | 2012-12-29 | 2013-06-05 | 宁波舜韵电子有限公司 | Zero-cross detection circuit with low standby power consumption |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469629B (en) * | 2015-08-19 | 2018-04-27 | 艾默生电气公司 | Self study relay turns off control system and method |
| CN106469629A (en) * | 2015-08-19 | 2017-03-01 | 艾默生电气公司 | Self study relay turns off control system and method |
| CN107257590A (en) * | 2017-06-16 | 2017-10-17 | 广东美的厨房电器制造有限公司 | control method and cooking appliance |
| CN107257590B (en) * | 2017-06-16 | 2020-11-24 | 广东美的厨房电器制造有限公司 | Control method and cooking appliance |
| CN109936202A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN108278743B (en) * | 2017-12-21 | 2020-10-09 | 青岛海尔科技有限公司 | Communication circuit and communication method of variable frequency air conditioner |
| CN108278743A (en) * | 2017-12-21 | 2018-07-13 | 青岛海尔科技有限公司 | The communicating circuit and the means of communication of convertible frequency air-conditioner |
| CN108592182A (en) * | 2018-03-28 | 2018-09-28 | 海信科龙电器股份有限公司 | Control circuit of indoor unit in air conditioner, control method of control circuit and air conditioner |
| CN109742993A (en) * | 2019-03-04 | 2019-05-10 | 珠海格力电器股份有限公司 | Circuit and method for preventing short circuit of alternating current fan and alternating current fan |
| CN110113037A (en) * | 2019-05-27 | 2019-08-09 | 深圳和而泰小家电智能科技有限公司 | Super-zero control circuit and electronic equipment |
| CN112444720A (en) * | 2019-08-30 | 2021-03-05 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method of electric control device |
| US11435389B2 (en) | 2019-08-30 | 2022-09-06 | Contemporary Amperex Technology Co., Limited | Electrical control device detection circuit, detection method, and electric vehicle |
| CN110797232A (en) * | 2019-09-26 | 2020-02-14 | 深圳市和玛科技有限公司 | Control method and circuit for preventing relay from being bonded |
| CN111431140A (en) * | 2020-02-25 | 2020-07-17 | 珠海格力电器股份有限公司 | Control method and device of control system, storage medium and electric appliance |
| CN111486570A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Control circuit, indoor unit, air conditioner and control method |
| CN112146253A (en) * | 2020-09-23 | 2020-12-29 | 海信（山东）空调有限公司 | Air conditioner and compressor control method thereof |
| CN112146253B (en) * | 2020-09-23 | 2021-12-17 | 海信（山东）空调有限公司 | Air conditioner and compressor control method thereof |
| CN112702810A (en) * | 2020-12-31 | 2021-04-23 | 广东美的厨房电器制造有限公司 | Control method and device of microwave oven and microwave oven |
| CN113107826A (en) * | 2021-04-14 | 2021-07-13 | 珠海拓芯科技有限公司 | Compressor start-stop control method and circuit and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104425184A (en) | Control device for switching on and switching off relay and air conditioner | |
| CN201110615Y (en) | Zero-crossing signal detection circuit of air conditioner controller and air conditioner | |
| CN105321770A (en) | Alternating current contactor controller and control method | |
| CN203732907U (en) | Intelligent control switch for power line carrier | |
| CN205583666U (en) | Use zero passage protection circuit on electric airer | |
| CN101257757B (en) | Fixed power limiter and lighting lamp | |
| TW201605168A (en) | Switch device and load control system including the same | |
| CN208127862U (en) | No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current | |
| CN203215024U (en) | Magnetic valve driving circuit with improved structure | |
| CN102175905B (en) | Zero crossing detecting circuit and device and warm air blower | |
| CN103490377A (en) | Protection circuit for electric leakage detection | |
| CN103075810A (en) | Power control device and water heater | |
| CN109417290A (en) | Protect circuit and distributor | |
| CN110416009B (en) | Arc-free long-life relay switch circuit and controller | |
| CN205353651U (en) | Soybean milk machine control circuit | |
| TWI430572B (en) | Radio intelligent relay time delay light control switch | |
| CN105098805A (en) | Voltage zero-crossing switching control verification method and switching control device | |
| CN105306028B (en) | Switchgear | |
| CN207459718U (en) | A kind of power input control circuit of direct-current inverter welding machine | |
| CN105759162A (en) | Power consumption detection device | |
| CN101867303B (en) | Intelligent electricity-saving device of AC/DC contactor | |
| CN103197579B (en) | A kind of open and close controlling method and circuit driving the switching device of AC load | |
| CN203631410U (en) | Vacuum circuit breaker controlling circuit and vacuum circuit breaker controlling system | |
| CN209133419U (en) | A kind of control relay circuit | |
| CN102802310B (en) | Light dimmer, light dimming system and light dimming method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150318 |
|
| RJ01 | Rejection of invention patent application after publication |