CN108386974B - Air-cooled magnetic suspension air conditioning unit and control method thereof - Google Patents
Air-cooled magnetic suspension air conditioning unit and control method thereof Download PDFInfo
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- CN108386974B CN108386974B CN201810082599.6A CN201810082599A CN108386974B CN 108386974 B CN108386974 B CN 108386974B CN 201810082599 A CN201810082599 A CN 201810082599A CN 108386974 B CN108386974 B CN 108386974B
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention belongs to the field of air conditioners and aims to solve the problem that the refrigerating output of an air-cooled magnetic suspension air conditioning unit is limited due to the fact that the existing air-cooled magnetic suspension air conditioning unit with two compressors cannot switch between a single compressor operation mode and a double compressor operation mode. The invention discloses a control method of an air-cooled magnetic suspension air conditioning unit, which comprises the following steps: acquiring the exhaust pressure and the pressure ratio of an air conditioning unit, the outlet water temperature of chilled water and the failure modes of two compressors; and selectively switching the current operation mode of the air conditioning unit according to at least one of the exhaust pressure, the pressure ratio, the chilled water outlet water temperature and the failure modes of the two compressors. In another aspect, the invention further provides an air-cooled magnetic suspension air conditioning unit, which comprises a controller, wherein the controller is used for executing the control method. By the air-cooled magnetic suspension air conditioning unit and the control method thereof, the refrigerating capacity of the air conditioning unit can be adjusted without limitation, and the air conditioning unit can be controlled more flexibly.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly provides an air-cooled magnetic suspension air conditioning unit and a control method thereof.
Background
At present, an air-cooled magnetic suspension air conditioning unit is assembled in a central air conditioner, and double compressors are assembled in the air-cooled magnetic suspension air conditioning unit.
However, in the existing double-compressor air-cooled magnetic suspension air conditioning unit, two compressors share one group of pipelines, and when one compressor fails or gives an alarm, the other compressor is started, so that the double compressors cannot be fully utilized; when the two compressors are provided with independent pipelines, the existing control logic can only control the two compressors to start/stop simultaneously, and cannot realize the switching between the operation mode of the single compressor and the operation mode of the two compressors, so that the refrigerating capacity of the air-cooled magnetic suspension air conditioning unit is limited and can only be adjusted within a small range.
Therefore, there is a need in the art for a new air-cooled magnetic levitation air conditioning unit and a control method thereof to solve the above problems.
Disclosure of Invention
The air-cooled magnetic suspension air conditioning unit aims to solve the problems in the prior art that the refrigerating capacity of the air conditioning unit is limited due to the fact that the existing air-cooled magnetic suspension air conditioning unit cannot switch between a single-compressor operation mode and a double-compressor operation mode. The invention provides a control method of an air-cooled magnetic suspension air conditioning unit, wherein the air conditioning unit comprises two compressors, and the control method comprises the following steps: acquiring the exhaust pressure and the pressure ratio of the air conditioning unit, the outlet water temperature of chilled water and the failure modes of the two compressors; and selectively switching the current operation mode of the air conditioning unit according to at least one of the exhaust pressure, the pressure ratio, the chilled water outlet temperature and the failure modes of the two compressors.
In a preferred technical solution of the above control method, the operation mode of the air conditioning unit includes: a single compressor mode of operation and a dual compressor mode of operation.
In a preferred embodiment of the above control method, the step of selectively switching the current operation mode of the air conditioning unit according to at least one of the discharge pressure, the pressure ratio, the chilled water outlet temperature, and a failure mode of the two compressors includes: judging whether the air conditioning unit meets a first preset condition and lasts for a first preset time; and if the air conditioning unit meets the first preset condition and lasts for the first preset time, switching the operation mode of the double compressors to the operation mode of the single compressor.
In a preferable technical solution of the above control method, the first preset condition includes that the exhaust pressure is greater than or equal to a first exhaust pressure threshold and the pressure ratio is greater than or equal to a first pressure ratio threshold, and/or the exhaust pressure is greater than or equal to a second exhaust pressure threshold, and/or the chilled water outlet temperature is less than a first outlet temperature threshold.
In a preferred embodiment of the above control method, the step of selectively switching the current operation mode of the air conditioning unit according to at least one of the discharge pressure, the pressure ratio, the chilled water outlet temperature, and a failure mode of the two compressors includes: judging whether the air conditioning unit meets a second preset condition and lasts for a second preset time; and if the air conditioning unit meets the second preset condition and lasts for the second preset time, switching the single-compressor operation mode to the double-compressor operation mode.
In a preferable embodiment of the above control method, the second preset condition includes: the exhaust pressure is less than a third exhaust pressure threshold, the full-load operation time of the currently operated compressor reaches a third preset time, the chilled water outlet water temperature is greater than a second outlet water temperature threshold, the non-operated compressor has no fault/alarm, and the stop operation time of the non-operated compressor reaches a fourth preset time.
In a preferred embodiment of the above control method, the control method further includes: and in the process that the air conditioning unit is in the single-compressor operation mode, if the currently operated compressor gives an alarm/fails, starting the non-operated compressor.
In a preferred embodiment of the above control method, the control method further includes: during the operation of the air conditioning unit in the dual compressor mode, if one of the compressors is alarming/malfunctioning, the other compressor is continuously operated.
In another aspect, the present invention also provides an air-cooled magnetic levitation air conditioning unit, which includes a controller for executing the control method.
In the preferable technical scheme of the air conditioning unit, the air conditioning unit further comprises a cylinder, and the two compressors are arranged in the cylinder.
It can be understood by those skilled in the art that, in the preferred technical solution of the present invention, the current operation mode of the air-cooled magnetic levitation air conditioning unit is selectively switched through at least one of the discharge pressure, the pressure ratio, the chilled water outlet temperature and the failure mode of the two compressors of the air-cooled magnetic levitation air conditioning unit, and through such a control manner, during the operation of the air conditioning unit, the switching can be performed as required in the single compressor operation mode and the dual compressor operation mode, so that the adjustment range of the cooling capacity of the air conditioning unit is increased, and the flexibility of the control of the air conditioning unit is improved.
Further, in the running process of the air conditioning unit, if a first preset condition is met and the first preset time lasts, the running mode of the air conditioning unit is switched from a double-compressor running mode to a single-compressor running mode; and if the second preset condition is met and the second preset time lasts, switching the operation mode of the air conditioning unit from the single-compressor operation mode to the double-compressor operation mode. Through such control mode for air conditioning unit's control is more nimble, for example when a compressor trouble, can start another compressor and maintain air conditioning unit's normal operating, for example adopt single compressor operation mode again and when the refrigerating output is not enough, can switch to two compressor operation modes in order to guarantee sufficient refrigerating output, has improved air conditioning unit operation's stability and reliability.
In addition, the invention also provides an air-cooled magnetic suspension air conditioning unit, which comprises a controller, wherein the controller is used for executing the control method, and the air conditioning unit also comprises two compressors arranged in the same cylinder. Compared with the air conditioning unit before improvement, the air conditioning unit provided by the invention can fully utilize the double compressors, namely the air conditioning unit can be switched between a single compressor mode and a double compressor mode, the limitation that the air conditioning unit with the double compressors can only be started/stopped simultaneously in the prior art is avoided, and the adjusting range of the refrigerating capacity of the air conditioning unit is enlarged.
Drawings
FIG. 1 is a flow chart of a control method of an air-cooled magnetic levitation air conditioning unit of the present invention;
FIG. 2 is a flow chart of a control method for switching the air-cooled magnetic levitation air conditioning unit from a double-compressor operation mode to a single-compressor operation mode according to the invention;
fig. 3 is a flowchart of a control method for switching the operation mode of the air-cooled magnetic levitation air conditioning unit from the single compressor operation mode to the double compressor operation mode.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that the terms "first", "second", "third" and "fourth" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Based on the problem that the conventional air-cooled magnetic suspension air conditioning unit with two compressors cannot realize the switching between the operating mode of a single compressor and the operating mode of the two compressors, the refrigerating capacity of the air-cooled magnetic suspension air conditioning unit is limited. The invention provides an air-cooled magnetic suspension air conditioning unit and a control method thereof, wherein the air conditioning unit can realize switching between a single compressor operation mode and a double compressor operation mode in the operation process, so that the refrigeration capacity of the air conditioning unit is not limited, and the control of the air conditioning unit is more flexible.
Specifically, the invention provides a control method of an air-cooled magnetic suspension air conditioning unit, wherein the air conditioning unit comprises two compressors, and the control method comprises the following steps: acquiring the exhaust pressure and the pressure ratio of an air conditioning unit, the outlet water temperature of chilled water and the failure modes of two compressors; and selectively switching the current operation mode of the air conditioning unit according to at least one of the exhaust pressure, the pressure ratio, the chilled water outlet water temperature and the failure modes of the two compressors. The current operation mode of the air conditioning unit can be switched through one parameter, and the current operation mode of the air conditioning unit can also be switched through the combination of a plurality of parameters.
It should be noted that the current operation mode of the air conditioning unit includes: a single compressor mode of operation and a dual compressor mode of operation.
In a preferred embodiment, as shown in fig. 1, fig. 1 is a flow chart of a control method of an air-cooled magnetic levitation air conditioning unit of the present invention. The control method of the air-cooled magnetic suspension air conditioning unit comprises the following steps:
and s100, acquiring the exhaust pressure, the pressure ratio, the chilled water outlet temperature and the failure modes of the two compressors of the air conditioning unit.
The air conditioner comprises an air conditioner unit, an air inlet pressure sensor, an air outlet temperature sensor, an air outlet pressure sensor, a chilled water outlet temperature sensor and a compressor, wherein the air outlet pressure of the air conditioner unit is detected by the air outlet pressure sensor, the air inlet pressure of the air conditioner unit is detected by the air inlet pressure sensor, the pressure ratio can be calculated by the air outlet pressure and the air inlet pressure, namely the pressure ratio is equal to the ratio of the air outlet pressure to the air inlet pressure of the air conditioner unit, the chilled water outlet temperature is detected by the chilled water outlet temperature sensor, and the fault mode of the compressor comprises the fault occurrence of the compressor or the alarm.
And s200, selectively switching the current operation mode of the air conditioning unit according to at least one of the exhaust pressure, the pressure ratio, the chilled water outlet water temperature and the failure modes of the two compressors.
It should be noted that, in the exhaust pressure, the pressure ratio, the chilled water outlet temperature and the failure modes of the two compressors of the air conditioning unit, if the exhaust pressure meets a certain specific condition, and/or the pressure ratio meets a certain specific condition, and/or the chilled water outlet temperature meets a certain specific condition, and/or the failure modes of the two compressors meet a certain specific condition, the operation mode of the air-cooled magnetic levitation air conditioning unit is switched between the single compressor operation mode and the double compressor operation mode. The technical solution of the present invention is described in detail below with reference to specific examples.
In one possible embodiment, referring to fig. 2, fig. 2 is a flowchart of a control method for switching the air-cooled magnetic levitation air conditioning unit from the dual-compressor operation mode to the single-compressor operation mode according to the present invention. As shown in fig. 2, the step of selectively switching the current operation mode of the air conditioning unit according to at least one of the discharge pressure, the pressure ratio, the chilled water leaving water temperature, and the failure modes of the two compressors includes:
and s210, the air conditioning unit is in a double-compressor operation mode.
And s211, judging whether the air conditioning unit meets a first preset condition and lasts for a first preset time.
The first preset condition comprises that the exhaust pressure is greater than or equal to a first exhaust pressure threshold value, the pressure ratio is greater than or equal to a first pressure ratio threshold value, and/or the exhaust pressure is greater than or equal to a second exhaust pressure threshold value, and/or the chilled water outlet temperature is less than a first outlet temperature threshold value.
That is, as long as at least one of the exhaust pressure, the pressure ratio, the chilled water outlet temperature and the two compressor failure modes meets a first preset condition and lasts for a first preset time in the operation process of the air conditioning unit, the operation mode of the air-cooled magnetic suspension air conditioning unit is switched from the double-compressor operation mode to the single-compressor operation mode.
It should be noted that the first exhaust pressure threshold is preferably 1.25P1, the first pressure ratio threshold is preferably 3.6Pr1, the second exhaust pressure threshold is preferably 1.5P2, and the first effluent temperature threshold is preferably Td-1 ℃, where P1 is a fixed value of the first exhaust pressure, P2 is a fixed value of the second exhaust pressure, Pr1 is a fixed value of the first pressure ratio, and Td is a set value of the effluent temperature. However, the first exhaust pressure threshold, the first pressure ratio threshold, the second exhaust pressure threshold, and the first outlet water temperature threshold are not limited to the above values, and may be other values, or may even be a value range, for example, the first exhaust pressure threshold is 3P1, or the first exhaust pressure threshold is 1.1P 1-2P 1, and the values of the first pressure ratio threshold, the second exhaust pressure threshold and the first effluent temperature threshold are the same as or similar to the values of the first exhaust pressure threshold, and a person skilled in the art can flexibly select the specific values of the first exhaust pressure threshold, the second exhaust pressure threshold, the first pressure ratio threshold and the first effluent temperature threshold in practical application, as long as the boundary point determined by the specific values is met, so that the air-cooled magnetic suspension air conditioning unit can be switched from the double-compressor operation mode to the single-compressor operation mode.
In addition, in the above description, P1, P2, Pr1 and Td may be obtained by sensor detection, or may be values obtained by testing under specific working conditions by those skilled in the art, and for those skilled in the art, specific values thereof need to be determined according to the actual application.
And s212, if the air conditioning unit meets a first preset condition and lasts for a first preset time, switching the operation mode of the double compressors to the operation mode of the single compressor.
That is to say, when the exhaust pressure Pd of the air conditioning unit is greater than or equal to 1.25P1, the pressure ratio Pr of the air conditioning unit is greater than or equal to 3.6Pr1 and lasts for a first preset time, the air conditioning unit is switched from the dual-compressor operation mode to the single-compressor operation mode; or the exhaust pressure Pd of the air conditioning unit is more than or equal to 1.5P2 and lasts for a first preset time, the air conditioning unit is switched from a double-compressor operation mode to a single-compressor operation mode; or the outlet water temperature Tewo of the chilled water of the air conditioning unit is less than Td-1 ℃, and the temperature lasts for a first preset time, and the air conditioning unit is switched from a double-compressor operation mode to a single-compressor operation mode. Preferably, the first preset time is 3s, but is not limited thereto, and the first preset time may also be any other time, for example, 4s, 5s, and the like, and for those skilled in the art, specific values thereof are determined according to the actual application.
And if the air conditioning unit does not meet the first preset condition and lasts for the first preset time, the operation mode of the air conditioning unit is not changed.
Preferably, when the air conditioning unit meets a first preset condition and lasts for a first preset time in the operation process, the air conditioning unit stops the compressor with longer operation time in the process of switching from the double-compressor operation mode to the single-compressor operation mode.
Referring to fig. 3, fig. 3 is a flowchart of a control method for switching an air-cooled magnetic levitation air conditioning unit from a single compressor operation mode to a double compressor operation mode according to a preferred embodiment of the present invention. As shown in fig. 3, the step of selectively switching the current operation mode of the air conditioning unit according to at least one of the discharge pressure, the pressure ratio, the chilled water leaving water temperature, and the failure modes of the two compressors further includes:
and s220, the air conditioning unit is in a single compressor operation mode.
And s221, judging whether the air conditioning unit meets a second preset condition and lasts for a second preset time.
The second preset condition comprises that the exhaust pressure is smaller than a third exhaust pressure threshold value, the full-load operation time of the currently operated compressor reaches a third preset time, the chilled water outlet temperature is larger than a second outlet water temperature threshold value, the non-operated compressor has no fault/alarm, and the operation stop time of the non-operated compressor reaches a fourth preset time.
It should be noted that the third exhaust pressure threshold is preferably 1.1P3, the third preset time is preferably 1min, and the second outlet water temperature threshold is preferably Td +2 ℃, where P3 is a fixed value of the third exhaust pressure and Td is a set value of the outlet water temperature. However, the third exhaust pressure threshold, the third preset time and the second effluent temperature threshold are not limited to the above values, and may also be other values, or may even be a value range, for example, the third exhaust pressure threshold is 2P3, or the third exhaust pressure threshold is 0.7P 3-2P 3, and the values of the second effluent temperature threshold and the third preset time are the same as or similar to the values of the third exhaust pressure threshold.
In addition, P3 and Td in the above description may be obtained by sensor detection, or may be values obtained by a person skilled in the art through experiments under specific conditions, and specific values thereof need to be determined according to actual application conditions.
And s222, if the air conditioning unit meets a second preset condition and lasts for a second preset time, switching the single-compressor operation mode into a double-compressor operation mode.
That is, when the discharge pressure Pd of the air conditioning unit is less than 1.1P3, the full-load operation time of the currently operated compressor reaches 1min, the chilled water outlet temperature Tewo is greater than Td +2 ℃, the non-operated compressor has no fault/alarm, the stop operation time of the non-operated compressor reaches a fourth preset time and lasts for a second preset time, the air conditioning unit is switched from the single compressor operation mode to the double compressor operation mode. Preferably, the second preset time is 3min, but is not limited thereto, and the second preset time may also be any other time, for example, 4min, 5min, and the like, and for those skilled in the art, specific values thereof are determined according to the actual application.
It should be noted that the fourth preset time is a minimum time interval required for restarting the compressor after the compressor is stopped, and after the compressor is stopped, if the compressor is started without reaching the minimum time interval, the compressor may be damaged or may not be started. Therefore, the requirement of a minimum time interval should be met first when starting the compressor again. In addition, the minimum time interval of the compressors of different models is different, and the specific value is determined by the compressors.
And if the air conditioning unit does not meet the second preset condition and lasts for the second preset time, the operation mode of the air conditioning unit is not changed.
In one possible scenario, with continued reference to fig. 2 and 3, the control method of the air conditioning assembly further comprises:
and s310, in the process that the air conditioning unit is in the single-compressor operation mode, if the currently operated compressor alarms/fails, starting the non-operated compressor.
In the single-compressor operation mode executed by the air conditioning unit, if the compressor in the operation mode fails/alarms, as long as the compressor which does not operate meets the requirement of the minimum time interval, the compressor which fails/alarms is stopped, and the compressor which does not operate is started, namely when one compressor fails/alarms, the compressor which does not operate is started, so that the air conditioning unit can continuously operate, and the reliability and the stability of the air conditioning unit are improved.
And s320, if one of the compressors is in an alarm/failure state during the operation mode of the air conditioning unit, the other compressor is continuously operated.
In the operation mode of the air conditioning unit executing the double compressors, if any one of the compressors fails/gives an alarm, the compressor which fails/gives the alarm is stopped, and the other compressor continues to normally operate, so that the reliability and the stability of the air conditioning unit are effectively improved.
In this embodiment, as an advantageous embodiment, the second fixed value of the exhaust pressure is greater than the first fixed value of the exhaust pressure, which is greater than the third fixed value of the exhaust pressure.
In another aspect, the present invention also provides an air-cooled magnetic levitation air conditioning unit, which includes a controller configured to execute the above control method, that is, the controller controls the switching between the current operation modes of the air conditioning unit by at least one of the discharge pressure, the pressure ratio, the chilled water outlet water temperature and the failure modes of the two compressors, and preferably, the air conditioning unit further includes a barrel, and the two compressors are both disposed in the barrel.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (4)
1. The air-cooled magnetic suspension air conditioning unit comprises two compressors and is characterized by further comprising a cylinder, wherein the two compressors are arranged in the cylinder, and the control method comprises the following steps:
acquiring the exhaust pressure and the pressure ratio of the air conditioning unit, the outlet water temperature of chilled water and the failure modes of the two compressors;
when the air conditioning unit is in a double-compressor operation mode, judging whether the air conditioning unit meets a first preset condition and lasts for a first preset time;
if the air conditioning unit meets the first preset condition and lasts for the first preset time, switching the double-compressor operation mode into a single-compressor operation mode;
when the air conditioning unit is in a single-compressor running mode, judging whether the air conditioning unit meets a second preset condition and lasts for a second preset time;
if the air conditioning unit meets the second preset condition and lasts for the second preset time, switching the single-compressor operation mode to the double-compressor operation mode,
wherein the first preset condition includes that the exhaust pressure is greater than or equal to a first exhaust pressure threshold and the pressure ratio is greater than or equal to a first pressure ratio threshold, and/or the exhaust pressure is greater than or equal to a second exhaust pressure threshold, and/or the chilled water leaving temperature is less than a first leaving water temperature threshold, the second preset condition includes that the exhaust pressure is less than a third exhaust pressure threshold, and the full load operation time of the currently operated compressor reaches a third preset time, and the chilled water leaving temperature is greater than a second leaving water temperature threshold, and the non-operated compressor has no fault/alarm, and the stop operation time of the non-operated compressor reaches a fourth preset time,
the fourth preset time is a minimum time interval required for restarting the compressor after the compressor stops, and a specific value of the minimum time interval is determined by the compressor.
2. The control method according to claim 1, characterized by further comprising:
and in the process that the air conditioning unit is in the single-compressor operation mode, if the currently operated compressor gives an alarm/fails, starting the non-operated compressor.
3. The control method according to claim 1, characterized by further comprising:
during the operation of the air conditioning unit in the dual compressor mode, if one of the compressors is alarming/malfunctioning, the other compressor is continuously operated.
4. An air-cooled magnetic levitation air conditioning unit comprising a controller, wherein the controller is configured to perform the control method of any one of claims 1 to 3.
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| CN110006141A (en) * | 2019-03-04 | 2019-07-12 | 青岛海尔空调电子有限公司 | The control method of air-cooled magnetic suspension unit and air-cooled magnetic suspension unit |
| CN114413511B (en) * | 2021-12-31 | 2023-11-24 | 青岛海尔空调电子有限公司 | Refrigerant liquid level control method, control device and medium of heat pump unit |
| CN114739066B (en) * | 2022-04-20 | 2023-08-11 | 江苏一万节能科技股份有限公司 | Dynamic control method and system for modularized magnetic suspension refrigerating unit |
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