CN108332380B - 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 PDF

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Publication number
CN108332380B
CN108332380B CN201810082727.7A CN201810082727A CN108332380B CN 108332380 B CN108332380 B CN 108332380B CN 201810082727 A CN201810082727 A CN 201810082727A CN 108332380 B CN108332380 B CN 108332380B
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conditioning unit
air conditioning
temperature
air
control method
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CN108332380A (en
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贺雪飞
沈太初
胡乐举
陶慧汇
时斌
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention belongs to the field of air conditioners and aims to solve the problem that the conventional air-cooled magnetic suspension air conditioning unit cannot simultaneously have a single compressor starting/stopping mode and a double compressor starting/stopping mode, so that the refrigerating capacity adjusting range 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 control method comprises the following steps: acquiring the ambient temperature and the outlet water temperature of the chilled water; and selecting a starting mode of the air conditioning unit according to at least one of the ambient temperature and the outlet water temperature of the chilled water. The air conditioning unit comprises a controller, and 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 starting mode of the air conditioning unit is more flexible.

Description

Air-cooled magnetic suspension air conditioning unit and control method thereof
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 can not realize the starting/stopping mode of the single compressor, so that the refrigerating capacity adjusting range of the air-cooled magnetic suspension air conditioning unit is limited, and the air-cooled magnetic suspension air conditioning unit can only be adjusted in a smaller 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 comprises a shell, a compressor, a magnetic suspension system and a. The invention provides a control method of an air-cooled magnetic suspension air conditioning unit, which comprises the following steps: acquiring the ambient temperature and the outlet water temperature of the chilled water; and selecting a starting mode of the air conditioning unit according to at least one of the environment temperature and the outlet water temperature of the chilled water.
In a preferred technical solution of the above control method, the air conditioning unit includes two compressors, and a start mode of the air conditioning unit includes: a single compressor start mode and a dual compressor start mode.
In a preferred technical solution of the above control method, the step of "selecting a start mode of the air conditioning unit according to at least one of the ambient temperature and the chilled water outlet temperature" specifically includes: comparing the ambient temperature to a first temperature threshold and the chilled water leaving water temperature to a second temperature threshold; and selecting the starting mode of the air conditioning unit according to the comparison result.
In a preferred embodiment of the above control method, the step of "selecting the starting mode of the air conditioning unit according to the comparison result" includes: and if the ambient temperature is greater than or equal to the first temperature threshold value and the outlet water temperature of the chilled water is less than the second temperature threshold value, the air conditioning unit executes a double-compressor starting mode.
In a preferred embodiment of the above control method, the step of "selecting the starting mode of the air conditioning unit according to the comparison result" further includes: and if the temperature of the outlet chilled water is greater than or equal to the second temperature threshold, the air conditioning unit executes a dual-compressor starting mode without judging the ambient temperature.
In a preferred embodiment of the above control method, the step of "selecting the starting mode of the air conditioning unit according to the comparison result" includes: and if the environment temperature is less than the first temperature threshold value and the outlet water temperature of the chilled water is less than the second temperature threshold value, the air conditioning unit executes a single compressor starting mode.
In a preferred embodiment of the above control method, before or simultaneously with the step of "obtaining the ambient temperature and the chilled water outlet temperature", the control method further includes: acquiring failure modes of the two compressors; and if one of the two compressors has a fault/alarm, the air conditioning unit executes a single compressor starting mode.
In a preferred embodiment of the above control method, the control method further includes: and if the two compressors are in failure/alarm, the air conditioning unit is not started.
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.
The technical scheme includes that the refrigerating capacity required to be provided by the air conditioning unit under the current environment is judged according to the environment temperature and/or the chilled water outlet temperature, and the single-compressor starting mode or the double-compressor starting mode of the air conditioning unit is determined according to the required refrigerating capacity, so that the starting mode of the air conditioning unit is more flexible, the adjusting range of the refrigerating capacity of the air conditioning unit is widened, and the air conditioning unit can run in an optimum mode all the time.
Further, the air conditioning unit is determined to execute the single-compressor operation mode or the double-compressor operation mode according to the comparison result of the ambient temperature and the first temperature threshold and/or the comparison result of the chilled water outlet temperature and the second temperature threshold. Through the setting of the first temperature threshold and the second temperature threshold, the air conditioning unit can accurately determine and execute a single-compressor starting mode or a double-compressor starting mode according to the external environment and the air conditioning unit, so that the air conditioning unit can provide enough refrigerating capacity, and the stability and the reliability of the operation of the air conditioning unit are further improved.
Furthermore, the air conditioning unit carries out self-checking before starting, namely, failure modes of the two compressors are obtained, if one of the compressors fails/gives an alarm, a single-compressor starting mode is executed, and if both the compressors fail/give an alarm, the air conditioning unit is not started. By the aid of the detection mode, the air conditioning unit can be prevented from being failed/alarmed before being started, damage to the compressor caused by forced starting of the compressor after the compressor in the air conditioning unit is failed/alarmed is avoided, the service life of the air conditioning unit is prolonged, and stability and reliability of operation of the air conditioning unit are improved.
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, and a single compressor starting mode is added, so that the problem that the double compressors can only be started/stopped simultaneously in the prior art is avoided, the starting mode of the air conditioning unit is more flexible, and the refrigerating capacity adjusting range of the air conditioning unit is wider.
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 first embodiment of a control method of the air-cooled magnetic levitation air conditioning unit of the present invention;
FIG. 3 is a flow chart of a second embodiment of the control method of the air-cooled magnetic levitation air conditioning unit of the present invention;
FIG. 4 is a flowchart of a third embodiment of the control method of the air-cooled magnetic levitation air conditioning unit of the present invention
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" and "second" 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 existing air-cooled magnetic suspension air conditioning unit pointed out in the background technology cannot have a single compressor starting/stopping mode and a double compressor starting/stopping mode at the same time, the refrigerating capacity adjusting range 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 simultaneously have a single compressor starting/stopping mode and a double compressor starting/stopping mode in the starting process, so that the starting mode of the air-cooled magnetic suspension air conditioning unit is more flexible.
Specifically, the invention provides a control method of an air-cooled magnetic suspension air conditioning unit, which comprises the following steps: acquiring the ambient temperature and the outlet water temperature of the chilled water; and selecting a starting mode of the air conditioning unit according to at least one of the ambient temperature and the outlet water temperature of the chilled water. The starting mode of the air conditioning unit can be selected through one parameter, or the starting mode of the air conditioning unit can be selected through the combination of the two parameters, so that a person skilled in the art can flexibly set the parameter condition for selecting the current starting mode by the air conditioning unit according to the actual situation in the practical application, and as long as the starting mode can be reasonably selected by the air conditioning unit through the setting of the parameter condition.
The starting mode of the air conditioning unit comprises a single compressor starting mode and a double compressor starting mode.
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 s200, acquiring the ambient temperature and the outlet water temperature of the chilled water.
The environment temperature is obtained through detection of an environment temperature sensor, and the chilled water outlet temperature is obtained through detection of a chilled water outlet temperature sensor.
And s300, selecting a starting mode of the air conditioning unit according to at least one of the ambient temperature and the outlet water temperature of the chilled water.
It should be noted that, in the environment temperature and the chilled water outlet temperature, if the environment temperature meets a certain specific condition and/or the chilled water outlet temperature meets a certain specific condition, the air-cooled magnetic levitation air conditioning unit selects to execute the single-compressor starting mode or the double-compressor starting mode according to the above conditions. The technical solution of the present invention is described in detail below with reference to specific examples.
In a possible implementation manner, referring to fig. 2, fig. 2 is a flowchart of an embodiment of a control method of an air-cooled magnetic levitation air conditioning unit according to the present invention. As shown in fig. 2, the step of selecting the start-up mode of the air conditioning unit according to at least one of the ambient temperature and the outlet temperature of the chilled water further includes:
s310, comparing the ambient temperature with a first temperature threshold, and comparing the chilled water leaving water temperature with a second temperature threshold.
And s320, selecting the starting mode of the air conditioning unit according to the comparison result.
That is, in the environment temperature and the chilled water outlet temperature, if a certain set relationship is satisfied between the environment temperature and the first temperature threshold value, and/or a certain set relationship is satisfied between the chilled water outlet temperature and the second temperature threshold value, the air-cooled magnetic levitation air conditioning unit selects to execute the single-compressor starting mode or the dual-compressor starting mode according to the above result.
In a preferred embodiment, as shown in fig. 3, fig. 3 is a flowchart of a second embodiment of the method for controlling an air-cooled magnetic levitation air conditioning unit according to the present invention. The method comprises the following steps:
s310, comparing the ambient temperature with a first temperature threshold, and comparing the chilled water leaving water temperature with a second temperature threshold.
The step of selecting the starting mode of the air conditioning unit according to the comparison result further comprises the following steps:
and s321, if the ambient temperature is greater than or equal to the first temperature threshold and the outlet water temperature of the chilled water is less than the second temperature threshold, executing a double-compressor starting mode by the air conditioning unit.
And s322, if the temperature of the outlet water of the chilled water is greater than or equal to the second temperature threshold, the air conditioning unit executes a dual-compressor starting mode without judging the ambient temperature.
And s323, if the ambient temperature is less than the first temperature threshold and the outlet water temperature of the chilled water is less than the second temperature threshold, executing a single compressor starting mode by the air conditioning unit.
Preferably, the first temperature threshold is a fixed value of the ambient temperature, and the second temperature threshold is a fixed value of the outlet temperature of the chilled water, wherein the fixed value of the ambient temperature and the fixed value of the outlet temperature of the chilled water can be values obtained through detection of a sensor, or values obtained through experiments by technical personnel in the field under specific working conditions.
That is to say, if the ambient temperature is greater than or equal to the fixed value of the ambient temperature and the outlet water temperature of the chilled water is less than the fixed value of the outlet water temperature of the chilled water, the refrigerating capacity required to be provided by the air conditioning unit is large, and in order to ensure that the sufficient refrigerating capacity is provided, the air conditioning unit needs to execute the dual-compressor starting mode to provide the large refrigerating capacity. If the chilled water outlet temperature is greater than or equal to the chilled water outlet temperature fixed value, similarly, the air conditioning unit also needs to provide a larger cooling capacity, so the air conditioning unit needs to perform a dual compressor start mode to provide a sufficient cooling capacity. If the ambient temperature is less than the ambient temperature threshold value, namely the air conditioning unit needs to provide smaller refrigerating capacity, the refrigerating capacity provided by starting one compressor can meet the requirement provided by the refrigerating capacity, and then the air conditioning unit executes a single-compressor starting mode. The energy consumption of the air conditioning unit can be reflected by the outlet water temperature of the chilled water, if the outlet water temperature of the chilled water is low, the energy consumption of the air conditioning unit is low, a single compressor starting mode is adopted at the moment, if the outlet water temperature of the chilled water is high, the energy consumption of the air conditioning unit is high, and a double compressor starting mode is adopted at the moment.
The air conditioning unit selects a starting mode through the method, namely the ambient temperature is compared with the first temperature threshold value and/or the chilled water outlet temperature is compared with the second temperature threshold value, the refrigerating capacity required to be provided by the air conditioning unit under the current environment can be accurately determined, whether the air conditioning unit starts a single compressor or double compressors is determined according to the refrigerating capacity, the air conditioning unit can be ensured to provide the corresponding refrigerating capacity, the running stability and reliability of the air conditioning unit are effectively improved, and the control mode of the air conditioning unit is more flexible.
Certainly, as an improvement of the above technical solution, the judgment of the outlet water temperature of the chilled water may be performed first, that is, if the outlet water temperature of the chilled water is greater than or equal to the second temperature threshold, the air conditioning unit directly executes the dual-compressor start mode without performing the judgment of the ambient temperature. If the outlet water temperature of the chilled water is less than the second temperature threshold, further judgment needs to be carried out through the ambient temperature, at this time, if the ambient temperature is higher (namely, the ambient temperature is greater than or equal to the first temperature threshold), the air conditioning unit executes the double-compressor starting mode, and if the ambient temperature is lower (namely, the ambient temperature is less than the first temperature threshold), the air conditioning unit executes the single-compressor starting mode.
In a preferred embodiment, referring to fig. 4, fig. 4 is a flowchart of a third embodiment of the control method of the air-cooled magnetic levitation air conditioning unit of the present invention. As shown in fig. 4, before or simultaneously with the step of "obtaining the ambient temperature and the outlet water temperature of the chilled water", the control method of the air-cooled magnetic suspension air conditioning unit further includes the following steps:
and s101, acquiring failure modes of the two compressors.
And s102, if one of the two compressors has a fault/alarm, executing a single-compressor operation mode by the air conditioning unit.
And s103, if the two compressors are in failure/alarm, the air conditioning unit is not started.
It can be seen from the above description that before or while the air conditioning unit is started, the failure modes of the two compressors in the air conditioning unit are obtained, that is, whether a failure/alarm occurs in the two compressors is checked, and if the failure/alarm occurs, whether the two compressors have been reset, if one of the two compressors has a failure/alarm and has not been reset, the air conditioning unit can only start the compressor without the failure/alarm, and if both the two compressors have a failure/alarm and have not been reset, the air conditioning unit is not started. By the method, the method for selecting the starting mode of the air conditioning unit is further optimized, for example, before the air conditioning unit is started, one of the compressors fails/alarms, meanwhile, the ambient temperature is greater than or equal to the first temperature threshold, and the chilled water outlet temperature is less than the second temperature threshold, the judgment is carried out according to the ambient temperature and the chilled water outlet temperature, the air conditioning unit needs to provide larger refrigerating capacity, at the moment, the air conditioning unit needs to execute the dual-compressor operation mode to provide enough refrigerating capacity, but one of the two compressors fails/alarms, and if the compressor is forcibly started before the compressor is not maintained/reset, the compressor is greatly damaged, even the compressor is damaged, so that before the air conditioning unit is started or at the same time of starting, the failure mode of the two compressors is obtained, and the compressor in the air conditioning unit can be effectively prevented from being forcibly started after the compressor fails/alarms The damage to the air conditioning unit is avoided, so that the service life of the air conditioning unit is prolonged, and the stability and the reliability of the operation of the air conditioning unit are improved.
In another aspect, the present invention further provides an air-cooled magnetic levitation air conditioning unit, which includes a controller for executing the control method described above, a cylinder, and two compressors disposed in the cylinder. Compared with the air conditioning unit before improvement, the air conditioning unit provided by the invention can judge and execute the single-compressor operation mode or the double-compressor operation mode before starting, so that the starting mode of the air conditioning unit is more flexible, and the refrigerating capacity adjusting range of the air conditioning unit is widened.
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 control method of the air-cooled magnetic suspension air conditioning unit is characterized in that the air conditioning unit comprises a cylinder and two compressors, the two compressors are arranged in the cylinder, and the starting mode of the air conditioning unit comprises the following steps: a single compressor start mode and a dual compressor start mode, the control method comprising:
acquiring the ambient temperature and the outlet water temperature of the chilled water;
comparing the outlet water temperature of the chilled water with a second temperature threshold;
if the temperature of the outlet chilled water is greater than or equal to the second temperature threshold, the air conditioning unit executes a dual-compressor starting mode without judging the ambient temperature;
if the outlet water temperature of the chilled water is less than the second temperature threshold, comparing the ambient temperature with a first temperature threshold;
if the ambient temperature is greater than or equal to the first temperature threshold value, the air conditioning unit executes a dual-compressor starting mode;
and if the ambient temperature is less than the first temperature threshold value, the air conditioning unit executes a single compressor starting mode.
2. The control method according to claim 1, wherein before or simultaneously with the step of "acquiring the ambient temperature and the chilled water outlet temperature", the control method further comprises:
acquiring failure modes of the two compressors;
and if one of the two compressors has a fault/alarm, the air conditioning unit executes a single compressor starting mode.
3. The control method according to claim 2, characterized by further comprising:
and if the two compressors are in failure/alarm, the air conditioning unit is not started.
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.
CN201810082727.7A 2018-01-29 2018-01-29 Air-cooled magnetic suspension air conditioning unit and control method thereof Active CN108332380B (en)

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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

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CN106766310A (en) * 2016-11-30 2017-05-31 珠海格力电器股份有限公司 Refrigeration system, refrigeration control method and refrigeration control device
CN107036351A (en) * 2017-04-28 2017-08-11 依米康冷元节能科技(上海)有限公司 The control method and device of multi-machine heads handpiece Water Chilling Units
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