CN112212482A - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN112212482A CN112212482A CN202010634181.9A CN202010634181A CN112212482A CN 112212482 A CN112212482 A CN 112212482A CN 202010634181 A CN202010634181 A CN 202010634181A CN 112212482 A CN112212482 A CN 112212482A
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- Prior art keywords
- compressor
- routine
- air conditioner
- rotation speed
- temperature
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/12—Vibration or noise prevention thereof
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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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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump 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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner which can reliably start a compressor even under the condition that the outside air temperature and the temperature of the compressor are high. The air conditioner starts the compressor in a first start-up routine (S3) when the "outside air temperature is less than or equal to T1" or the "compressor temperature is less than or equal to T2" (NO at S1 or S2), and starts the compressor in a second start-up routine (S4) when the "outside air temperature > T1" and the "compressor temperature > T2" (YES at S1 and S2). The first startup procedure is a startup procedure with a high effect of suppressing vibration and noise at startup. The second starting process is a starting process that can reliably start the compressor even in an overload state.
Description
Technical Field
The present invention relates to an air conditioner.
Background
Patent document 1 discloses a compressor start-up routine for performing start-up of a compressor in an air conditioner. Patent document 1 discloses that, when a start failure is detected when a compressor drive motor is started, the start voltage is sequentially increased by a predetermined voltage to restart the drive motor. In the compressor start-up routine of patent document 1, when the start-up failure reaches a predetermined number of times, the air conditioner is abnormally stopped.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-267432
Disclosure of Invention
Technical problem to be solved by the invention
In a compressor start-up routine in an air conditioner, the compressor is usually started up while suppressing vibration and noise at the time of start-up, and on the other hand, reliable start-up is required even when the outside air temperature is high and the load on the compressor is large.
In the compressor start-up routine of patent document 1, when a start-up failure occurs for some reason, the start-up reliability is improved by increasing the start-up voltage of the motor at the time of restart after the start-up failure, but the start-up failure in the case where the load on the compressor is large is not assumed. Further, according to the study of the present inventor, the method of raising the starting voltage of the motor as in patent document 1 cannot be said to be an optimum method of improving the reliability of the starting when the load of the compressor is large. Therefore, in the compressor start-up routine in patent document 1, even in a case where it is more strict for the start-up of the compressor, the compressor may not be started up.
For example, when an air conditioner that is operating in a state where the outside air temperature is high is temporarily stopped and restarted, that is, when both the outside air temperature and the compressor temperature are high, the compressor is in an abnormal overload state, and the protection operation is activated when the air conditioner is restarted, so that the compressor is likely to fail to start. In the start-up routine of patent document 1, there is a possibility that the operation of the air conditioner is stopped after the repeated start-up failure, while the start-up routine cannot cope with such a situation.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an air conditioner capable of reliably starting a compressor even when both the outside air temperature and the compressor temperature are high.
Means for solving the problems
In order to solve the above problem, an air conditioner according to the present invention includes: a determination unit that determines whether or not the compressor is in an overload state when the operation of the air conditioner is started; and a control unit that performs start control of the compressor, wherein the control unit starts the compressor in a first start program that is highly effective in suppressing vibration and noise at the time of start when the determination unit determines that the compressor is not in an overload state, and the control unit starts the compressor in a second start program that can reliably start the compressor even in an overload state when the determination unit determines that the compressor is in an overload state.
According to the above configuration, when it is determined that the compressor is in the overload state, the compressor is started by the second start-up routine that reliably starts up the compressor, whereby the compressor can be reliably started up while preventing a failure in starting up the compressor.
In the air conditioner, the first start-up routine and the second start-up routine may be configured as follows: the second starting program includes a starting program for increasing the compressor rotation speed to a desired rotation speed while forcibly increasing the motor drive current of the compressor during starting, and the second starting program shifts the timing for increasing the motor drive current to a timing after the first starting program.
According to the above configuration, in the second start-up routine, by shifting the timing of increasing the motor drive current to the timing after the first start-up routine, the rotor of the drive motor can be accelerated in a state where the rotor of the drive motor has sufficient rotational inertia. Thereby, even in an overload state where both the outside air temperature and the compressor temperature are high, it is possible to prevent the start-up failure of the compressor and to perform the reliable start-up.
In the air conditioner, the first start-up routine and the second start-up routine may be configured as follows: and a start-up routine for increasing the motor drive current when the compressor rotation speed reaches a predetermined compressor rotation speed, wherein the predetermined compressor rotation speed is set to be greater than the compressor rotation speed of the first start-up routine in the second start-up routine.
In the air conditioner, the determination unit may determine that the compressor is in an overload state when an outside air temperature is higher than a first temperature threshold and a compressor temperature is higher than a second temperature threshold.
Effects of the invention
The air conditioner of the invention has the following effects: even in an overload state where both the outside air temperature and the compressor temperature are high, the compressor can be reliably started by starting the compressor in the second starting procedure.
Drawings
Fig. 1 is a schematic configuration diagram of an air conditioner according to a first embodiment.
Fig. 2 is a flowchart showing a compressor start-up routine when the air conditioner according to the first embodiment starts operating.
Fig. 3 is a timing chart showing changes in the motor drive current and the compressor rotation speed in the first start-up procedure.
Fig. 4 is a timing chart showing changes in the motor drive current and the compressor rotation speed in the second start-up routine.
Detailed Description
[ first embodiment ]
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic configuration diagram of an air conditioner 10 according to a first embodiment, and shows a refrigeration cycle applied to the air conditioner 10.
The air conditioner 10 includes an indoor unit (indoor unit) 100 and an outdoor unit (outdoor unit) 110. In the path of the refrigeration cycle (heat pump) in the air conditioner 10, the indoor heat exchanger 101 is provided on the indoor unit 100 side, and the compressor 111, the outdoor heat exchanger 112, the four-way valve 113, and the expansion valve 114 are provided on the outdoor unit 110 side. Further, the indoor unit 100 includes: an indoor fan 102 that sends air heat-exchanged by the indoor heat exchanger 101 to the indoor, and the outdoor unit 110 includes: the air is sent to the outdoor fan 115 of the outdoor heat exchanger 112.
The air conditioner 10 further includes a first temperature sensor 121 for detecting an outside air temperature and a second temperature sensor 122 for detecting a compressor temperature. The first temperature sensor 121 detects the intake air temperature of the outdoor heat exchanger 112 as the outside air temperature. Further, although detailed illustration is omitted in fig. 1, the air conditioner 10 is appropriately provided with a temperature sensor that detects the temperature of each part in the refrigeration cycle as needed, in addition to the first temperature sensor 121 and the second temperature sensor 122.
The four-way valve 113 switches the refrigerant circulation direction in accordance with the cooling/heating operation of the air conditioner 10 (fig. 1 shows a state during the cooling operation). In the cooling operation, the refrigerant circulates through the compressor 111, the four-way valve 113, the outdoor heat exchanger 112, the expansion valve 114, the indoor heat exchanger 101, the four-way valve 113, and the compressor 111 in this order. That is, in the cooling operation, the outdoor heat exchanger 112 functions as a condenser, and the indoor heat exchanger 101 functions as an evaporator. On the other hand, during the heating operation, the refrigerant circulates through the compressor 111, the four-way valve 113, the indoor heat exchanger 101, the expansion valve 114, the outdoor heat exchanger 112, the four-way valve 113, and the compressor 111 in this order. That is, during the heating operation, the indoor heat exchanger 101 functions as a condenser, and the outdoor heat exchanger 112 functions as an evaporator.
Fig. 2 is a flowchart showing a start-up routine (compressor start-up routine) of the compressor 111 at the start of operation of the air conditioner 10 according to the first embodiment. The following compressor start-up routine is executed by providing a control unit (not shown) included in the air conditioner 10 to control a drive current (motor drive current) of a drive motor (not shown) of the compressor 111.
When the air conditioner 10 starts to operate, the first temperature sensor 121 detects the outside air temperature, and the second temperature sensor 122 detects the compressor temperature. In the control portion, the detected outside air temperature and compressor temperature are compared with a first temperature threshold T1 (e.g., 50 ℃) and a second temperature threshold T2 (e.g., 80 ℃) (S1, S2), respectively.
The control unit (determination unit) determines whether or not the compressor 111 is in an overload state at the start of operation based on the detected outside air temperature and the compressor temperature. When at least one of the outside air temperature and the compressor temperature is below the threshold value, that is, in the case of "the outside air temperature ≦ T1" or "the compressor temperature ≦ T2" (NO at S1 or S2), it is determined that the overload state is not being made and the routine proceeds to S3. When both the outside air temperature and the compressor temperature are higher than the threshold values, that is, in the case where "outside air temperature > T1" and "compressor temperature > T2" (yes in both S1 and S2), it is determined to be in an overload state and the process proceeds to S4.
In S3, the start-up of the compressor 111 is started in the first start-up routine. The 1 st start-up routine is a normal start-up routine applied in a case where the compressor 111 is not in an overload state, and is a start-up routine having a high effect of suppressing vibration and noise at the time of start-up. Fig. 3 is a timing chart showing changes in the motor drive current and the compressor rotation speed in the first start-up routine.
When starting the compressor 111, the motor drive current is normally forcibly increased halfway to increase the compressor rotation speed to a desired rotation speed. Here, a compressor start-up routine for finally increasing the compressor rotation speed to N3 (e.g., 3500rpm) is exemplified. In the first embodiment, the timing of increasing the motor drive current is controlled based on the compressor rotation speed. Therefore, the control unit according to the first embodiment monitors the compressor rotation speed.
As shown in fig. 3, in the first start-up routine, the motor drive current is set to I1 at the start of start-up, and the motor drive current is forcibly increased to I2 at a time point (time t11) when the compressor rotation speed reaches N11 (e.g., 1500 rpm). Further, the rise of the motor drive current is stopped at a time point (time t12) when the compressor rotation speed reaches N12 (for example, 2000 rpm). Then, if the compressor rotation speed reaches N3 (time t13) and the motor drive current stabilizes at I3, the start-up of the compressor 111 is completed (the compressor start-up routine ends). Here, the motor drive current I3 is a motor drive current corresponding to the compressor rotation speed N3.
From the start to time t11, the amount of work increases as the compressor speed increases, and therefore the current also increases. From time t11 to time t12, motor drive current I2 having a current value larger than motor drive current I3 is forcibly applied, and the current value becomes substantially constant. When the rising period of the motor drive current ends at time t12, the motor drive current becomes (decreases) a current corresponding to the compressor rotation speed at that time. Then, between time t12 and time t13, the amount of work increases as the compressor speed increases until the compressor speed stabilizes at N3, and therefore the current also increases.
In the first start-up routine, timings (i.e., the compressor rotation speeds N11, N12) for increasing the motor drive current are set so that vibrations and noises at the time of start-up can be suppressed.
In S4, the start-up of the compressor 111 is started in the second start-up routine. The second start-up routine is applied when the compressor 111 is in an overload state and it is determined that a start-up failure is likely to occur in a normal start-up routine. In other words, although the second start-up routine has larger vibrations and noises at the start-up than the first start-up routine, the compressor 111 can be reliably started even in an overload state. Fig. 4 is a timing chart showing changes in the motor drive current and the compressor rotation speed in the second start-up routine.
As shown in fig. 4, in the second start-up routine, the motor drive current is set to I1 at the start of start-up, and the motor drive current is forcibly increased to I2 at a time point (time t21) when the compressor rotation speed reaches N21 (e.g., 2000 rpm). Further, the rise of the motor drive current is stopped at a time point (time t22) when the compressor rotation speed reaches N22 (for example, 2500 rpm). Then, if the compressor rotation speed reaches N3 (time t23) and the motor drive current stabilizes at I3, the start of the compressor 111 is completed (the compressor start-up routine ends). In the second starting routine, the rotation speed of the compressor at the timing of switching the period of rise of the motor drive current is set to be greater than the rotation speed in the first starting routine. Namely, N21> N11, and N22> N12.
When the compressor 111 is started, the rotor of the drive motor is accelerated at the time of raising the motor drive current, but when the compressor 111 is in an overload state, a start failure is liable to occur at the acceleration time. In the second start-up routine, the motor drive current is increased in a state where the compressor rotation speed is higher than that in the first start-up routine, and therefore, the timing to increase the motor drive current is shifted to after the first start-up routine. By moving the timing of raising the motor drive current backward in this way, the rotor of the drive motor is accelerated in a state where the rotor of the drive motor has sufficient rotational inertia, and a start failure of the compressor 111 can be prevented (reliable start is performed).
[ second embodiment ]
In the first embodiment, the timing of increasing the motor drive current is controlled based on the compressor rotation speed in the first start-up routine and the second start-up routine. However, the present invention is not limited to this, and the timing of raising the motor drive current may be controlled based on the time elapsed from the start of starting.
For example, in the time chart shown in fig. 3, the time t11 at which the predicted compressor rotation speed reaches N11 and the time t12 at which the predicted compressor rotation speed reaches N12 may be set in advance, and the control unit may increase the motor drive current at the time when the times t11 and t12 have elapsed.
Similarly, in the time chart shown in fig. 4, a time t21 predicted to reach the compressor rotation speed N21 and a time t22 predicted to reach the compressor rotation speed N22 are set in advance, and the control unit increases the motor drive current at the time point when the times t21 and t22 have elapsed.
In the compressor start-up routine according to the second embodiment, the control unit may execute the compressor start-up routine by measuring time with a timer instead of monitoring the compressor rotation speed.
[ third embodiment ]
In the first embodiment described above, the current values (i.e., I1 and I2) of the motor drive current (starting current) that rises in stages during the starting are the same in both the first starting routine and the second starting routine. However, the present invention is not limited to this, and the starting current may be different in the first starting procedure and the second starting procedure (the finally reached motor driving current I3 is the same).
Specifically, the start-up currents I1 'and I2' in the second start-up procedure may be greater than the start-up currents I1 and I2 in the first start-up procedure (I1'> I1 and I2' > I2). In this way, by making the starting current in the second starting process larger than the starting current in the first starting process, it is possible to more reliably prevent the failure of the start-up of the compressor 111.
[ fourth embodiment ]
In the first embodiment described above, the overload state in which the second start-up routine is executed is determined based on the outside air temperature and the compressor temperature. However, the invention is not limited thereto, and the overload state in which the second startup procedure is implemented may also be determined based on other parameters.
For example, it is conceivable to determine the overload state in which the second startup procedure is performed based on the external temperature and the time elapsed since the previous operation stop. That is, it is assumed that if a sufficient time has elapsed since the last operation stop, the compressor temperature drops to such an extent that it is not in an overload state, but if the sufficient time has not elapsed, the temperature can be expected to be maintained at a higher level.
Therefore, in the compressor start-up routine according to the fourth embodiment, when the outside air temperature is higher than the first temperature threshold value T1 (for example, 50 ℃), and the elapsed time since the previous operation stop is shorter than a predetermined time threshold value (for example, 1 hour), it is regarded that the compressor 111 is in the overload state, and the second start-up routine can be executed.
The embodiments disclosed herein are merely exemplary in all respects, and are not intended to be construed as limiting. Therefore, the technical scope of the present invention is not to be interpreted only by the embodiments described above, but is defined by the description of the claims. The technical scope of the present invention includes all modifications within the meaning and range equivalent to the claims.
Description of the reference numerals
10 air conditioner, 100 indoor units (indoor units), 101 indoor heat exchanger, 102 indoor fan, 110 outdoor unit (outdoor unit), 111 compressor, 112 outdoor heat exchanger, 113 four-way valve, 114 expansion valve, 115 outdoor fan, 121 first temperature sensor, 122 second temperature sensor
Claims (4)
1. An air conditioner characterized by comprising:
a determination unit that determines whether or not a compressor is in an overload state when the operation of the air conditioner is started; and
a control unit for controlling the start of the compressor,
the control unit starts the compressor in a first start-up routine having a high effect of suppressing vibration and noise at the time of start-up when the determination unit determines that the compressor is not in the overload state,
when the judging unit judges that the compressor is in an overload state, the control unit starts the compressor in a second starting program that can reliably start the compressor even in the overload state.
2. The air conditioner according to claim 1,
the first boot program and the second boot program are: a start-up program for increasing the rotation speed of the compressor to a desired rotation speed while forcibly increasing the motor drive current of the compressor during start-up,
in the second start-up routine, the timing for increasing the motor drive current is shifted to a timing after the first start-up routine.
3. The air conditioner according to claim 2,
the first boot program and the second boot program are: a start-up routine for increasing the motor drive current when the compressor rotation speed reaches a predetermined compressor rotation speed,
in the second starting procedure, the predetermined compressor rotation speed is set to be greater than the compressor rotation speed of the first starting procedure.
4. The air conditioner according to any one of claims 1 to 3,
the determination unit determines that the compressor is in an overload state when an outside air temperature is higher than a first temperature threshold and a compressor temperature is higher than a second temperature threshold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-127507 | 2019-07-09 | ||
| JP2019127507A JP7319115B2 (en) | 2019-07-09 | 2019-07-09 | air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112212482A true CN112212482A (en) | 2021-01-12 |
| CN112212482B CN112212482B (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010634181.9A Active CN112212482B (en) | 2019-07-09 | 2020-07-02 | Air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7319115B2 (en) |
| CN (1) | CN112212482B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213548A (en) * | 1993-01-18 | 1994-08-02 | Hitachi Ltd | Refrigerator |
| CN101917152A (en) * | 2010-07-29 | 2010-12-15 | 宁波奥克斯空调有限公司 | Starting method of permanent-magnet synchronous compressor for variable-frequency air conditioner |
| JP2015105648A (en) * | 2013-12-03 | 2015-06-08 | カルソニックカンセイ株式会社 | Electric compressor and its control method |
| CN104791960A (en) * | 2015-04-30 | 2015-07-22 | 广东美的制冷设备有限公司 | Air conditioner unloading control system and method |
| CN106123417A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The control method that a kind of compressor of air conditioner starts and control device |
| CN109028491A (en) * | 2018-08-13 | 2018-12-18 | 宁波奥克斯电气股份有限公司 | A kind of frequency converting air-conditioner compressor soft-start method, system and air conditioner |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62233652A (en) * | 1986-04-01 | 1987-10-14 | 松下電器産業株式会社 | Heat pump type air conditioner |
| JP3506457B2 (en) * | 1993-04-23 | 2004-03-15 | 東芝キヤリア株式会社 | Startup control method of compressor in air conditioner |
| JPH10267432A (en) * | 1997-03-24 | 1998-10-09 | Mitsubishi Heavy Ind Ltd | Actuation control device of air conditioner |
| JP2003039942A (en) * | 2001-07-30 | 2003-02-13 | Suzuki Motor Corp | Air conditioner for electric vehicle |
| JP2005337679A (en) * | 2004-05-31 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Refrigerator |
| JP2008104337A (en) * | 2006-09-21 | 2008-05-01 | Sanyo Electric Co Ltd | Control unit of electromotor for refrigerant compressor |
-
2019
- 2019-07-09 JP JP2019127507A patent/JP7319115B2/en active Active
-
2020
- 2020-07-02 CN CN202010634181.9A patent/CN112212482B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213548A (en) * | 1993-01-18 | 1994-08-02 | Hitachi Ltd | Refrigerator |
| CN101917152A (en) * | 2010-07-29 | 2010-12-15 | 宁波奥克斯空调有限公司 | Starting method of permanent-magnet synchronous compressor for variable-frequency air conditioner |
| JP2015105648A (en) * | 2013-12-03 | 2015-06-08 | カルソニックカンセイ株式会社 | Electric compressor and its control method |
| CN104791960A (en) * | 2015-04-30 | 2015-07-22 | 广东美的制冷设备有限公司 | Air conditioner unloading control system and method |
| CN106123417A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The control method that a kind of compressor of air conditioner starts and control device |
| CN109028491A (en) * | 2018-08-13 | 2018-12-18 | 宁波奥克斯电气股份有限公司 | A kind of frequency converting air-conditioner compressor soft-start method, system and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021011995A (en) | 2021-02-04 |
| CN112212482B (en) | 2023-07-04 |
| JP7319115B2 (en) | 2023-08-01 |
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