CN111023525A - Control circuit and method and air conditioner - Google Patents
Control circuit and method and air conditioner Download PDFInfo
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- CN111023525A CN111023525A CN201911313493.3A CN201911313493A CN111023525A CN 111023525 A CN111023525 A CN 111023525A CN 201911313493 A CN201911313493 A CN 201911313493A CN 111023525 A CN111023525 A CN 111023525A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control circuit, a control method and an air conditioner, wherein the circuit comprises: a detection circuit (102) for detecting a voltage of the grid power supply (101); the micro-control chip (103) is used for calculating the average value of the voltage detected in the preset time period of the detection circuit (102), outputting a first level signal when the average value exceeds a first preset value, and outputting a second level signal when the average value is lower than the first preset value; the relay control circuit (104) is used for conducting when the micro control chip outputs a first level signal, controlling the relay to be attracted, and enabling the transformer (105) to step down the voltage and then supply power to the air conditioner (106); and when the micro control chip outputs the second level signal, the micro control chip is cut off, so that the power grid power supply (101) directly supplies power to the air conditioner (106). The control circuit has the advantages that software and hardware of the control circuit are provided with the filtering interference signals, misjudgment is reduced, the protection circuit is arranged, the reliability of the circuit is improved, stable operation of the air conditioner under a high-voltage condition is achieved, the circuit is simple, easy to achieve and low in cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control circuit and method and an air conditioner.
Background
The existing air-conditioning products are adapted to 160V-265V voltage and stably run. However, in the actual operation process, the voltage is unstable due to the influence of various factors on the power supply grid, and the grid may output higher voltage, so that the air conditioner is subjected to fault protection and cannot operate stably.
Disclosure of Invention
It is a primary object of the present application to provide a control circuit, a method and an air conditioner, which are used to at least partially solve the above technical problems.
To solve the above problem, an aspect of the present invention provides a control circuit for controlling a voltage when an air conditioner 106 operates, including: a detection circuit 102 for detecting a voltage of the grid power supply 101; the micro-control chip 103 is used for calculating an average value of the grid voltage detected by the detection circuit 102 within a preset time period, outputting a first level signal when the average value exceeds a first preset value, and outputting a second level signal when the average value is lower than the first preset value; the relay control circuit 104 is used for conducting when the micro control chip 103 outputs a first level signal, controlling the relay to be attracted, and enabling a transformer 105 of the control circuit to step down the power grid voltage and then supply power to the air conditioner 106; and when the micro control chip 103 outputs a second level signal, the circuit is cut off, so that the power grid power supply 101 directly supplies power to the air conditioner 106.
Therefore, the average value of the power grid voltage detected in the preset time period is used as the actual voltage value for judgment, misjudgment of the main chip caused by waveform distortion or other interference of the power grid is avoided, the power supply circuit is correspondingly adjusted according to comparison between the actual voltage value and the preset value, and stable operation of the air conditioner under the high-voltage condition is achieved. And the circuit design is simple, easy to realize and low in cost.
Optionally, the detection circuit 102 includes a first diode D1 and a second diode D2, the first diode D1 and the second diode D2 are connected in parallel between the input terminal and the output terminal of the detection circuit 102, and the first diode D1 and the second diode D2 are in opposite current conduction directions.
Therefore, the diode is designed to protect the detection circuit, the detection circuit is prevented from being damaged, and the micro-control chip is further prevented from being damaged.
Optionally, the detection circuit 102 further includes a first capacitor C2, a second capacitor C3, a third capacitor C4, a first resistor R1, a second resistor R2, and a third resistor R3; the first resistor R1 is connected in parallel with the second resistor R2; a first end of the first capacitor C2 is connected with a first end of the second resistor R2, a second end of the first capacitor C2 is connected with a first end of the third capacitor C4, and a second end of the third capacitor C4 is grounded; the first end of the second capacitor C3 is grounded, the second end is connected with the first end of the third resistor R3, and the second end of the third resistor R3 is connected with the second end of the second resistor R2.
Therefore, the RC filter circuit is formed by the capacitor and the resistor, the anti-interference capacity of the detection circuit is improved, and misjudgment of the micro control chip is reduced.
Optionally, the transformer 105 is a tapped transformer.
Therefore, the voltage reduction range of the transformer in the actual working process can be flexibly adjusted, and the voltage range of the stable operation of the air conditioner is expanded.
Optionally, the micro control chip 103 is further configured to send a control signal to control the air conditioner 106 to stop working when the average value exceeds a second preset value, where the second preset value is greater than the first preset value.
Therefore, when the voltage is too high, the safety of the air conditioner can be ensured, and the air conditioner is prevented from being damaged.
Optionally, the detection circuit 102 further includes an amplifier, and when detecting the voltage of the power grid 101, the voltage is preprocessed by setting a bias voltage and a gain of the amplifier.
Optionally, the detection circuit 102 further includes at least one fourth resistor R4, configured to divide the voltage of the power grid when detecting the voltage.
Optionally, the relay control circuit 104 includes a transistor Q1 for controlling the on and off of the relay control circuit 104.
Therefore, the on and off of the relay control circuit can be quickly realized through the triode. The circuit is simple and the cost is low.
Another aspect of the present invention provides a control method for controlling a voltage when an air conditioner operates, including: detecting the voltage of the power grid 101; calculating the average value of the power grid voltage in a preset time period, and judging whether the average value exceeds a first preset value; if yes, outputting a first level signal to control the relay control circuit 104 to be conducted, so that the transformer 105 reduces the voltage of the power grid and supplies power to the air conditioner 106; if not, outputting a second level signal to control the relay control circuit 104 to be cut off, so that the power grid power supply directly supplies power to the air conditioner 106.
The control method has the same advantages as the control circuit, and is not described in detail herein.
Yet another aspect of the present invention provides an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read by the processor and when executed, implementing the method as described above.
The advantages of the air conditioner are the same as those of the control method, and the description is omitted.
Drawings
FIG. 1 schematically illustrates a block diagram of a control circuit provided by an embodiment of the present invention;
FIG. 2 schematically illustrates a block diagram of a detection circuit provided by an embodiment of the present invention;
FIG. 3 is a block diagram schematically illustrating a relay control circuit provided by an embodiment of the present invention;
FIG. 4 is a flow chart that schematically illustrates a control method provided by an embodiment of the present invention;
FIG. 5 schematically illustrates a block diagram of a control system provided by an embodiment of the present invention;
fig. 6 schematically shows a block diagram of an air conditioner provided by an embodiment of the present invention.
Description of reference numerals:
101-a power grid power supply, 102-a detection circuit, 103 a micro-control chip, 104-a relay control circuit, 105-a transformer, 106-an air conditioner, C2-a first capacitor, C3-a second capacitor, C4-a third capacitor, R1-a first resistor, R2-a second resistor, R3-a third resistor, R4-a fourth resistor, R14-a fifth resistor, R15-a sixth resistor, a Q1-triode, D1-a first diode, D2-a second diode and D3-a third diode.
Detailed Description
In order to make the purpose, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Referring to fig. 1, fig. 1 schematically illustrates a block diagram of a control circuit provided in this embodiment, and as shown in fig. 1, the control circuit may include:
the detection circuit 102 is configured to detect a voltage of the power grid 101.
The voltage of the power grid input detection circuit 102 can be divided by the resistors connected in series, the divided voltage signal is transmitted to the amplifier, the amplifier can preprocess the voltage signal by setting the bias voltage and the gain of the amplifier through the combination of the capacitor and the resistor, and then the preprocessed signal is transmitted to the micro control chip 103.
And the micro control chip 103 is configured to receive the voltage signal detected by the detection circuit 102, calculate an average value of the grid voltage detected by the detection circuit 102 within a preset time period, output a first level signal when the average value exceeds a first preset value, and output a second level signal when the average value is lower than the first preset value.
In a feasible manner of this embodiment, in order to avoid the erroneous determination caused by the waveform distortion or other interference of the power grid, the micro control chip 103 may use an average of the power grid voltage values detected in the preset time period as the actual voltage of the power grid output. The preset time period may be, for example, 0.5s, 1s, 2s, and the present invention is not limited thereto.
The first preset value may be, for example, 260V, which is not limited in the present invention. The first level signal may be, for example, a high level signal, and the second level signal may be, for example, a low level signal.
The micro control chip 103 is further configured to send a control signal to control the air conditioner 106 to stop when the average value is higher than a second preset value, where the second preset value is higher than the first preset value. The second preset value may be 330V, for example. The invention is not limited.
The relay control circuit 104 is used for conducting when the micro control chip outputs a first level signal, controlling the relay to be attracted, and enabling a transformer 105 of the control circuit to step down the voltage of a power grid and then supply power to the air conditioner 106; and when the micro control chip outputs the second level signal, the micro control chip is cut off, so that the power grid directly supplies power to the air conditioner 106.
In a feasible manner of this embodiment, the relay control circuit 104 may control the on/off of the relay control circuit 104 through a transistor, and the micro control detection circuit 102 outputs a high level, the transistor is turned on, outputs a low level, and the transistor is turned off.
In a feasible manner of this embodiment, the transformer 105 may adopt a tapped transformer 105, for example, and the voltage of the power grid may be reduced to different degrees by changing a joint of the transformer 105, for example, the voltage may be reduced by 10%, 15%, or 20%, and the present invention is not limited specifically.
In the embodiment, the average value of the detected power grid voltage in the preset time period is used as the actual voltage value for judgment, so that the misjudgment of the main chip caused by the waveform distortion or other interference of the power grid is avoided, the power supply circuit is correspondingly adjusted according to the comparison between the actual voltage value and the preset value, and the stable operation of the air conditioner under the high-voltage condition is realized. And moreover, the voltage reduction range of the transformer in the actual working process can be flexibly adjusted, the voltage range of the stable operation of the air conditioner is expanded, and when the voltage is too high, the safety of the air conditioner can be ensured, and the air conditioner is prevented from being damaged. Meanwhile, the circuit is simple in design, easy to implement and low in cost.
Example two
Referring to fig. 2, fig. 2 schematically illustrates a structure diagram of the detection circuit provided in the present embodiment, and as shown in fig. 2, the detection circuit 102 may include:
the circuit comprises a first capacitor C2, a second capacitor C3, a third capacitor C4, a first resistor R1, a second resistor R2 and a third resistor R3. The first resistor R1 is connected in parallel with the second resistor R2; the first end of the first capacitor C2 is connected to the first end of the second resistor R2, the second end of the first capacitor C2 is connected to the first end of the third capacitor C4, and the second end of the third capacitor C4 is grounded. The first end of the second capacitor C3 is grounded, the second end is connected with the first end of the third resistor R3, and the second end of the third resistor R3 is connected with the second end of the second resistor R2. Through the design, the RC filter circuit is formed, and the anti-interference capability of the circuit can be improved.
The detection circuit 102 further comprises at least one fourth resistor R4 connected in series between the input and the output of the detection circuit 102 for dividing the grid voltage when detecting the voltage of the grid power source 101.
The first capacitor C2, the second capacitor C3 and the third capacitor C4 may be 0603-.
The detection circuit 102 further includes a first diode D1 and a second diode D2, the first diode D1 and the second diode D2 are connected in parallel between the input terminal and the output terminal of the detection circuit 102, and the first diode D1 and the second diode D2 are opposite in current conduction direction. The detection circuit 102 is connected to an input of the micro control chip 103. By means of the two diodes, the detection circuit 102 can be protected against damage to the amplifier in special situations, which in turn leads to damage to the microcontroller chip 103.
The first diode D1 and the second diode D2 may be IN4148(0.15/0.4W), for example.
EXAMPLE III
Referring to fig. 3, fig. 3 schematically illustrates a structure diagram of the relay control circuit provided in this embodiment, and as shown in fig. 3, the relay control circuit 104 includes:
a fifth resistor R14 and a sixth resistor R15, wherein the first end of the fifth resistor R14 is connected with the output end of the micro-control chip 103, the second end is connected with the base of the triode Q1 and the first end of the sixth resistor R15, and the emitter of the triode Q1 and the second end of the sixth resistor R15 are grounded. The collector of the triode Q1 is connected with the relay, and the on-off of the triode Q1 controls the opening and closing of the relay to change the access so as to control whether the transformer 105 is inserted into the access. When the relay is switched on, the transformer 105 is switched on, the voltage of the power grid is reduced through the transformer 105 and then the power is supplied, otherwise, the power is directly supplied through the power grid. A third diode D3 is also connected in parallel across the relay.
The fifth resistor R14 may be 0603-1k Ω ± 1%, the sixth resistor may be 0603-10k Ω ± 1%, and the third diode D3 may be IN4148 (0.15/0.4W).
Example four
Referring to fig. 4, fig. 4 schematically illustrates a flowchart of the control method provided in the present embodiment, and as shown in fig. 4, the method may include operations S401 to S404, for example.
S401, detecting the voltage of the grid power supply 101.
S402, calculating the average value of the grid voltage in a preset time period, and judging whether the average value exceeds a first preset value.
And S403, if yes, outputting a first level signal to control the relay control circuit 104 to be conducted, so that the transformer 105 reduces the voltage of the power grid and supplies power to the air conditioner 106.
S404, if not, outputting a second level signal to control the relay control circuit 104 to be cut off, so that the power grid power supply 101 directly supplies power to the air conditioner 106.
The embodiments of the method, which have not been described in detail, refer to the above embodiments of products, which have the same advantages as the above embodiments of products, and are not described herein again.
Referring to fig. 5, fig. 5 schematically illustrates a block diagram of the control system provided in the present embodiment, and as shown in fig. 5, the control system 500 may include, for example, a detection module 510, a calculation module 520, a determination module 520, a first execution module 540, and a second execution module 550.
And a detection module 510, configured to detect a power supply voltage of the power grid.
And the calculating module 520 is used for calculating an average value of the power grid voltage in a preset time period.
The determining module 530 is configured to determine whether the average value exceeds a first preset value.
The first execution module 540 is configured to output a first level signal to control the relay control circuit to be turned on when the average value exceeds a first preset value, so that the transformer steps down the power grid voltage and supplies power to the air conditioner;
and a second executing module 550, configured to output a second level signal to control the relay control circuit to be turned off when the average value does not exceed the first preset value, so that the power grid directly supplies power to the air conditioner.
For some embodiments of the system, please refer to the above method embodiments for details, which have the same advantages as the above control method, and are not repeated herein.
Referring to fig. 6, fig. 6 schematically shows a block diagram of an air conditioner provided in the present embodiment. The air conditioner 600 may include, for example, a processor 610 and a computer-readable storage medium 620 storing a computer program 621.
In particular, the processor 610 may comprise, for example, a general purpose microprocessor, an instruction set processor and/or related chip set and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), or the like. The processor 610 may also include onboard memory for caching purposes. The processor 610 may be a single processing unit or a plurality of processing units for performing the different actions of the method flows according to embodiments of the present disclosure.
Computer-readable storage medium 620, for example, may be a non-volatile computer-readable storage medium, specific examples including, but not limited to: magnetic storage systems, such as magnetic tape or Hard Disk Drives (HDDs); optical storage systems, such as compact discs (CD-ROMs); memory such as Random Access Memory (RAM) or flash memory, etc.
The computer-readable storage medium 620 may include a computer program 621, which computer program 621 may include code/computer-executable instructions that, when executed by the processor 610, cause the processor 610 to perform a method according to an embodiment of the disclosure, or any variation thereof.
The computer program 621 may be configured with, for example, computer program code comprising computer program modules. For example, in an example embodiment, code in computer program 621 may include one or more program modules, including for example module 621A, module 621B, … …. It should be noted that the division and number of the modules are not fixed, and those skilled in the art may use suitable program modules or program module combinations according to actual situations, so that the processor 610 may execute the method according to the embodiment of the present disclosure or any variation thereof when the program modules are executed by the processor 610.
At least one of the detection module 510, the calculation module 520, the determination module 520, the first execution module 540, and the second execution module 550 according to embodiments of the present disclosure may be implemented as a computer program module described with reference to fig. 6, which, when executed by the processor 610, may implement the respective operations described above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A control circuit for controlling a voltage when an air conditioner is operated, comprising:
a detection circuit (102) for detecting a voltage of the grid power supply (101);
the micro-control chip (103) is used for calculating the average value of the voltage detected in the preset time period of the detection circuit (102), outputting a first level signal when the average value exceeds a first preset value, and outputting a second level signal when the average value is lower than the first preset value;
the relay control circuit (104) is used for conducting when the micro control chip (103) outputs a first level signal, controlling the relay to be attracted, and enabling the transformer (105) to step down the voltage and then supply power to the air conditioner (106); and when the micro control chip (103) outputs a second level signal, the micro control chip is cut off, so that the power grid power supply (101) directly supplies power to the air conditioner (106).
2. The control circuit of claim 1, wherein the detection circuit (102) comprises a first diode (D1) and a second diode (D2), the first diode (D1) and the second diode (D2) are connected in parallel between the input terminal and the output terminal of the detection circuit (102), and the first diode (D1) and the second diode (D2) are in opposite current conduction directions.
3. The control circuit of claim 1, wherein the detection circuit (102) further comprises a first capacitor (C2), a second capacitor (C3), a third capacitor (C4), a first resistor (R1), a second resistor (R2), and a third resistor (R3);
the first resistor (R1) is connected in parallel with the second resistor (R2);
the first end of the first capacitor (C2) is connected with the first end of the second resistor (R2), the second end of the first capacitor (C2) is connected with the first end of the third capacitor (C4), and the second end of the third capacitor (C4) is grounded;
the first end of the second capacitor (C3) is grounded, the second end of the second capacitor is connected with the first end of the third resistor (R3), and the second end of the third resistor (R3) is connected with the second end of the second resistor (R2).
4. The control circuit according to claim 1, wherein the detection circuit (102) further comprises at least one fourth resistor (R4) for dividing the voltage of the grid power source (101) when detecting the voltage.
5. The control circuit according to claim 1, wherein the transformer (105) is a tapped transformer.
6. The control circuit according to any of claims 1-5, wherein the micro control chip (103) is further configured to send a control signal to control the air conditioner (106) to stop operating when the average value exceeds a second preset value, wherein the second preset value is greater than the first preset value.
7. The control circuit of claim 1, wherein the relay control circuit (104) comprises a transistor (Q1) for controlling the on and off of the relay control circuit (104).
8. The control circuit according to claim 1, wherein the detection circuit (102) further comprises an amplifier, and when detecting the voltage of the grid power supply (101), the voltage is preconditioned by setting a bias voltage and a gain of the amplifier.
9. A control method for controlling a voltage when an air conditioner is operated, comprising:
detecting a voltage of a grid power supply (101);
calculating the average value of the voltage in a preset time period, and judging whether the average value exceeds a first preset value;
if yes, outputting a first level signal to control a relay control circuit (104) to be conducted, so that a transformer (105) reduces the voltage of the power grid and supplies power to the air conditioner (106);
if not, outputting a second level signal to control a relay control circuit (104) to be cut off, so that the power grid power supply (101) directly supplies power to the air conditioner (106).
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program when read and executed by the processor implementing the method of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911313493.3A CN111023525B (en) | 2019-12-18 | 2019-12-18 | Control circuit and method and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313493.3A CN111023525B (en) | 2019-12-18 | 2019-12-18 | Control circuit and method and air conditioner |
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| CN111023525A true CN111023525A (en) | 2020-04-17 |
| CN111023525B CN111023525B (en) | 2021-08-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3140952B2 (en) * | 1995-10-20 | 2001-03-05 | 三菱電機株式会社 | Control device for air conditioner |
| CN101162871A (en) * | 2007-09-28 | 2008-04-16 | 艾默生网络能源有限公司 | Method for prompting the range of air conditioner accommodating electric network electric voltage and frequency and device thereof |
| CN103075810A (en) * | 2013-01-18 | 2013-05-01 | 深圳和而泰智能控制股份有限公司 | Power control device and water heater |
| CN203871274U (en) * | 2014-05-09 | 2014-10-08 | 杭州和而泰智能控制技术有限公司 | Energy-saving resistive-capacitive step-down relay control circuit |
| CN109579388A (en) * | 2018-11-23 | 2019-04-05 | Tcl空调器(中山)有限公司 | Compressor SS (soft start) control circuit, method and air conditioner |
-
2019
- 2019-12-18 CN CN201911313493.3A patent/CN111023525B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3140952B2 (en) * | 1995-10-20 | 2001-03-05 | 三菱電機株式会社 | Control device for air conditioner |
| CN101162871A (en) * | 2007-09-28 | 2008-04-16 | 艾默生网络能源有限公司 | Method for prompting the range of air conditioner accommodating electric network electric voltage and frequency and device thereof |
| CN103075810A (en) * | 2013-01-18 | 2013-05-01 | 深圳和而泰智能控制股份有限公司 | Power control device and water heater |
| CN203871274U (en) * | 2014-05-09 | 2014-10-08 | 杭州和而泰智能控制技术有限公司 | Energy-saving resistive-capacitive step-down relay control circuit |
| CN109579388A (en) * | 2018-11-23 | 2019-04-05 | Tcl空调器(中山)有限公司 | Compressor SS (soft start) control circuit, method and air conditioner |
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| CN111023525B (en) | 2021-08-13 |
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