CN115899950A - Operation control method and device of air conditioning unit and air conditioning unit - Google Patents

Operation control method and device of air conditioning unit and air conditioning unit Download PDF

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Publication number
CN115899950A
CN115899950A CN202211640040.3A CN202211640040A CN115899950A CN 115899950 A CN115899950 A CN 115899950A CN 202211640040 A CN202211640040 A CN 202211640040A CN 115899950 A CN115899950 A CN 115899950A
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China
Prior art keywords
air conditioning
conditioning unit
rate
low
low pressure
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CN202211640040.3A
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Chinese (zh)
Inventor
李龙
钟海玲
程琦
周进
周会芳
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Priority to CN202211640040.3A priority Critical patent/CN115899950A/en
Publication of CN115899950A publication Critical patent/CN115899950A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Abstract

The application relates to an operation control method and device of an air conditioning unit, the air conditioning unit, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring a low-pressure drop rate of the air conditioning unit; when the low pressure drop rate is larger than a set value and the low pressure drop of the air conditioning unit is determined to be too fast, acquiring unit operation parameters; when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit; and if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining that the reason for the too fast low pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection. By adopting the method, the labor cost can be reduced and the maintenance efficiency can be improved.

Description

Operation control method and device of air conditioning unit and air conditioning unit
Technical Field
The present application relates to the field of air conditioning technologies, and in particular, to an operation control method and apparatus for an air conditioning unit, a computer-readable storage medium, and a computer program product.
Background
The existing air conditioning unit is influenced by devices in the operation process or the installation geographical position more or less, so that communication between some devices of the unit and a main board of the whole unit is interrupted, and the unit is stopped due to faults.
Generally, after communication is interrupted, the electronic expansion valve can generate an automatic reset action, and at the moment, a compressor of a unit can idle, so that the compressor is easily damaged; in the existing unit detection mode, when the communication fault lasts for a long time, whether the electronic expansion valve is abnormal or not due to the communication fault can be detected, otherwise, the electronic expansion valve is difficult to detect, so that the electronic expansion valve can be determined to be abnormal or not after the electronic expansion valve is manually detected, and therefore the manual detection cost is high and the maintenance efficiency of the unit is low.
Disclosure of Invention
In view of the above, it is necessary to provide an operation control method and apparatus for an air conditioning unit, a computer-readable storage medium, and a computer program product, which can reduce labor cost and improve maintenance efficiency.
In a first aspect, the present application provides a method for controlling operation of an air conditioning unit. The method comprises the following steps:
acquiring a low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, determining that the reason for the too fast low-pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low-pressure protection.
In one embodiment, the method further comprises:
if the real-time low-voltage value is larger than or equal to the low-voltage protection value of the air conditioning unit, recording the times of too fast low-voltage drop of the air conditioning unit in a preset time period;
when the number of times that the low pressure of the air conditioning unit is reduced too fast within a preset time period is greater than the preset number of times, sending a prompt message; and the prompt information is used for prompting to investigate the electronic expansion valve of the air conditioning unit.
In one embodiment, the method further comprises:
and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in a preset time period is less than or equal to a preset number of times.
In one embodiment, the determining that the air conditioning unit has the communication fault according to the unit operation parameters includes:
and when the operating parameters of the devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
In one embodiment, the unit operating parameters include: the air conditioning unit comprises a fan frequency increasing rate of the air conditioning unit, a closing opening degree of an electronic expansion valve of the air conditioning unit, a compressor frequency increasing rate of the air conditioning unit and a water inlet temperature decreasing rate of the air conditioning unit;
when the operation parameters of the devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has a communication fault comprises the following steps:
and when the fan frequency rising rate of the air conditioning unit is smaller than or equal to a fan frequency rising rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency rising rate of the air conditioning unit is smaller than or equal to a compressor frequency rising rate set value, and the inlet water temperature falling rate of the air conditioning unit is smaller than or equal to an inlet water temperature falling rate set value, determining that the air conditioning unit has a communication fault.
In one embodiment, the method further comprises:
and when at least one of the operation parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In one embodiment, the unit operating parameters include: the control system comprises a fan frequency increasing rate of the air conditioning unit, a closing opening degree of an electronic expansion valve of the air conditioning unit, a compressor frequency increasing rate of the air conditioning unit and a water inlet temperature decreasing rate of the air conditioning unit;
at least one of the operation parameters of the plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operation parameters include at least one of the following:
the fan frequency rising rate of the air conditioning unit is larger than a set value for excessively high fan frequency rising rate;
the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve;
the frequency increasing rate of a compressor of the air conditioning unit is greater than a set value for the frequency increasing rate of the compressor;
the water inlet temperature reduction rate of the air conditioning unit is larger than the set value of the water inlet temperature reduction rate which is too fast.
In one embodiment, the method further comprises:
and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the low pressure drop rate of the air conditioning unit is determined not to be too fast according to the condition that the low pressure drop rate is smaller than or equal to the set value.
In a second aspect, the present application provides an operation control device of an air conditioning unit, the device including:
the acquisition module is used for acquiring the low-pressure drop rate of the air conditioning unit;
the first processing module is used for acquiring unit operation parameters when the low pressure drop of the air conditioning unit is determined to be too fast according to the fact that the low pressure drop rate is larger than a set value;
the second processing module is used for acquiring a real-time low-voltage value of the air conditioning unit when the communication fault of the air conditioning unit is determined according to the unit operation parameters;
and the control module is used for determining the reason that the low pressure of the air conditioning unit is too fast reduced because an electronic expansion valve of the air conditioning unit is abnormal if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
In a third aspect, the present application provides an air conditioning unit comprising: the pressure sensor, the electronic expansion valve and the controller are arranged at the air suction end of the compressor;
the pressure sensor is used for detecting the pressure values of the air suction end of the compressor before and after a preset interval;
the controller is used for obtaining the low-pressure reduction rate of the air conditioning unit according to the pressure values before and after the preset interval and detected by the pressure sensor; when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters; when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit; and if the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, determining the reason that the low pressure of the air conditioning unit drops too fast is that the electronic expansion valve is abnormal, and controlling the air conditioning unit to start low-pressure protection.
In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring a low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, determining that the reason for the too fast low-pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low-pressure protection.
In a fifth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:
acquiring the low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, determining that the reason for the too fast low-pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low-pressure protection.
According to the operation control method and device of the air conditioning unit, the computer readable storage medium and the computer program product, the unit operation parameters are obtained when the low pressure drop rate of the air conditioning unit is determined to be too fast according to the fact that the low pressure drop rate is larger than the set value, the real-time low pressure value of the air conditioning unit is obtained when the communication fault of the air conditioning unit is determined according to the unit operation parameters, and the low pressure protection is controlled to be started by the air conditioning unit when the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit and the reason that the low pressure drop of the air conditioning unit is too fast is determined to be abnormal due to the electronic expansion valve of the air conditioning unit. According to the method and the device, when the air conditioning unit is determined to be abnormal in communication according to the low-voltage operation rate of the air conditioning unit and the unit operation parameters of the air conditioning unit, whether the electronic expansion valve is abnormal or not is determined according to the real-time voltage value, so that the abnormal detection of the electronic expansion valve in communication fault can be realized without depending on a manual detection mode, and the labor cost can be reduced; when the electronic expansion valve is determined to be abnormal, maintenance personnel can maintain the electronic expansion valve without manually detecting the abnormality of the electronic expansion valve, so that the maintenance efficiency can be improved.
Drawings
FIG. 1 is a schematic flow chart of an operation control method of an air conditioning unit according to an embodiment;
FIG. 2 is a schematic flow chart illustrating a method for controlling the operation of an air conditioning unit according to another embodiment;
FIG. 3 is a schematic flow chart illustrating a method for controlling the operation of an air conditioning unit according to another embodiment;
fig. 4 is a block diagram showing an operation control device of the air conditioning unit according to one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The operation control method of the air conditioning unit provided by the embodiment of the application can be applied to the air conditioning unit, and the air conditioning unit comprises an expansion valve, a control valve or a stop valve which is controlled by electricity. In one embodiment, an air conditioning unit includes a pressure sensor disposed at a suction side of a compressor, an electronic expansion valve, and a controller. The controller is used for obtaining a low-pressure reduction rate of the air conditioning unit according to pressure values in a preset time period detected by the pressure sensor, obtaining unit operation parameters when the low-pressure reduction rate is larger than a set value to determine that the low pressure of the air conditioning unit is too fast to reduce, obtaining a real-time low-pressure value of the air conditioning unit when the communication fault of the air conditioning unit is determined according to the unit operation parameters, and if the real-time low-pressure value is smaller than a low-pressure protection value of the air conditioning unit, determining that the reason that the low pressure of the air conditioning unit is too fast to reduce is abnormal due to the electronic expansion valve, and controlling the air conditioning unit to start low-pressure protection.
In one embodiment, as shown in fig. 1, an operation control method for an air conditioning unit is provided, which is described by taking a controller applied to the air conditioning unit as an example, and includes the following steps:
and S102, acquiring the low-pressure drop rate of the air conditioning unit.
In some embodiments, a pressure sensor may be disposed at an air suction end of a compressor of the air conditioning unit, the pressure sensor detects pressure values of the air suction end of the compressor before and after a preset interval, and a low pressure drop rate of the air conditioning unit is obtained according to a difference value and a time corresponding to the preset interval by calculating a difference value between two pressure values before and after the preset interval.
And S104, acquiring unit operation parameters when the low pressure of the air conditioning unit is determined to be too fast according to the fact that the low pressure drop rate is larger than the set value.
In some embodiments, when the low-pressure drop rate is greater than the low-pressure drop rate over-fast set value, it may be determined that the low-pressure drop rate of the air conditioning unit is too fast, and it may be further determined whether the low-pressure drop of the air conditioning unit is too fast due to a communication failure. Specifically, by acquiring the unit operation parameters, whether the air conditioning unit has a communication fault is determined according to the unit operation parameters, that is, the controller executes S106.
And S106, when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit.
In some embodiments, when it is determined that the air conditioning unit has a communication fault according to the unit operation parameters, by obtaining a low-voltage real-time value of the air conditioning unit, a specific reason why the low voltage of the air conditioning unit drops too fast when the air conditioning unit has the communication fault can be further determined.
In some embodiments, when it is determined that the air conditioning unit has a communication fault according to the unit operation parameters, the unit operation parameters of the air conditioning unit have a mapping relationship with a reason causing the too fast low voltage drop of the air conditioning unit, and according to the mapping relationship, the reason causing the too fast low voltage drop of the air conditioning unit can be determined. For example, if the unit operating parameters of the air conditioning unit include the inlet water temperature of the compressor, the reason for the low pressure drop of the air conditioning unit is too fast because the ambient temperature drops too fast.
And S108, if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining that the reason that the low pressure of the air conditioning unit drops too fast is that an electronic expansion valve of the air conditioning unit is abnormal, and controlling the air conditioning unit to start low pressure protection.
In some embodiments, whether the electronic expansion valve of the air conditioning unit is abnormally driven or not affects the voltage of the suction end of the compressor of the air conditioning unit. If the real-time low-pressure value of the air suction end of the compressor is smaller than the low-pressure protection value of the air conditioning unit, the reason that the low pressure of the air conditioning unit is reduced too fast can be determined to be that an electronic expansion valve of the air conditioning unit is abnormal, and the air conditioning unit is controlled to start low-pressure protection.
In some embodiments, when the air conditioning unit is controlled to start low-voltage protection, the controller may control the air conditioning unit to stop, and meanwhile, the controller may send first warning information to the maintenance terminal, where the first warning information is used to instruct a maintenance worker to troubleshoot the electronic expansion valve of the air conditioning unit to implement maintenance of the air conditioning unit, so that the maintenance worker does not need to troubleshoot each device in the air conditioning unit one by one, and maintenance efficiency may be improved.
In some embodiments, when the air conditioning unit is controlled to start the low-voltage protection, the controller may send a second warning message to the maintenance terminal, where the second warning message may include a location where the air conditioning unit is located, and a reason why the air conditioning unit starts the low-voltage protection is that the low voltage of the air conditioning unit drops too fast due to an abnormality of the electronic expansion valve, so that a maintenance worker maintains the electronic expansion valve in the air conditioning unit according to the location where the air conditioning unit is located, thereby improving maintenance efficiency.
In some embodiments, when the air conditioning unit is controlled to start low-voltage protection and send warning information to the maintenance terminal, the warning information may include first warning information and second warning information, and the warning information may further indicate a maintenance worker to investigate surrounding interference sources of the air conditioning unit, so as to further improve the stability of the operation of the air conditioning unit.
In summary, in the embodiment shown in fig. 1, by acquiring the low-pressure drop rate of the air conditioning unit, when it is determined that the low-pressure drop of the air conditioning unit is too fast according to the fact that the low-pressure drop rate is greater than the set value, the unit operation parameter is acquired, and when it is determined that the communication fault occurs in the air conditioning unit according to the unit operation parameter, the real-time low-pressure value of the air conditioning unit is acquired, so that when it is determined that the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, it is determined that the reason for the too fast low-pressure drop of the air conditioning unit is an abnormality of an electronic expansion valve of the air conditioning unit, and the air conditioning unit is controlled to start low-pressure protection. According to the method and the device, when the air conditioning unit is determined to be abnormal in communication according to the low-pressure operation rate of the air suction end of the compressor of the air conditioning unit and the unit operation parameters of the air conditioning unit, whether the electronic expansion valve is abnormal or not is determined according to the real-time voltage value of the air suction end of the compressor, so that the abnormal detection of the electronic expansion valve in communication fault can be realized without depending on a manual detection mode, and the labor cost can be reduced; when the electronic expansion valve is determined to be abnormal, maintenance personnel can maintain the electronic expansion valve without manually detecting the abnormality of the electronic expansion valve, so that the maintenance efficiency can be improved.
In one embodiment, the method further comprises: and returning to the step of acquiring the low-pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too high low-pressure drop according to the fact that the low-pressure drop rate is smaller than or equal to the set value. Therefore, whether the low pressure of the air conditioning unit is too fast can be determined through the low pressure drop rate of the air conditioning unit obtained again, and real-time judgment of the low pressure drop process in the operation process of the air conditioning unit is achieved.
In one embodiment, as shown in fig. 2, the method further comprises the steps of:
and S202, if the real-time low-pressure value is larger than or equal to the low-pressure protection value of the air conditioning unit, recording the times of too fast low-pressure drop of the air conditioning unit in a preset time period.
S204, when the number of times of too fast low pressure drop of the air conditioning unit in a preset time period is larger than a preset number of times, sending a prompt message; the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
In some embodiments, the preset number may be an integer greater than or equal to 2, and in this embodiment, the preset number is 2; when the number of times that the low pressure of the air conditioning unit is reduced too fast within a preset time period is larger than the preset number of times, the controller can send prompt information to the maintenance terminal, wherein the prompt information can comprise the position of the air conditioning unit and information for indicating to investigate an electronic expansion valve of the air conditioning unit, so that maintenance personnel can contact with a user according to the position of the air conditioning unit, maintenance of the air conditioning unit is achieved, and after-sale service quality is improved; and under the condition that the electronic expansion valve of the air conditioning unit is not required to be manually detected abnormally, the electronic expansion valve of the air conditioning unit is directly maintained, so that the detection accuracy rate can be improved.
It can be understood that when the number of times that the low pressure of the air conditioning unit drops too fast in the preset time period is greater than the preset number of times, the frequency that the low pressure of the air conditioning unit drops too fast in the preset time period is high, and in order to guarantee the stable operation of the air conditioning unit, the electronic expansion valve of the air conditioning unit is maintained by prompting maintenance personnel, so that the use experience of a user on the air conditioning unit is improved, and the stability of the subsequent operation of the air conditioning unit is improved.
It can be understood that when different control processes are executed according to the magnitude relation between the real-time low-voltage value and the low-voltage protection value of the air conditioning unit, for example, when the real-time low-voltage value is smaller than the low-voltage protection value, the low-voltage protection is started; when the real-time low-voltage value is greater than or equal to the low-voltage protection value and the number of times that the low voltage of the air conditioning unit is reduced too fast within the preset time period is greater than the preset number of times, the prompt message is sent, so that the operation mode of the air conditioning unit can be reasonably regulated and controlled, and the fault tolerance rate and the operation stability of the air conditioning system are improved.
In one embodiment, the method further comprises: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in the preset time period is less than or equal to the preset number of times.
It can be understood that when the number of times that the low pressure of the air conditioning unit drops too fast in the preset time period is less than or equal to the preset number of times, it indicates that the frequency that the low pressure of the air conditioning unit drops too fast in the preset time period is low, and by returning to the step of obtaining the low pressure drop rate of the air conditioning unit, whether the low pressure of the air conditioning unit drops too fast can be determined according to the low pressure drop rate of the air conditioning unit obtained again, so that the real-time judgment of the low pressure drop process in the operation process of the air conditioning unit is realized.
In one embodiment, the unit operation parameters of the air conditioning unit include operation parameters of a plurality of devices of the air conditioning unit, and determining that the air conditioning unit has a communication fault according to the unit operation parameters includes: and when the operating parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; when the operation parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults, comprising the following steps: when the fan frequency-increasing rate of the air conditioning unit is smaller than or equal to a fan frequency-increasing rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency-increasing rate of the air conditioning unit is smaller than or equal to a compressor frequency-increasing rate set value, and the water inlet temperature drop rate of the air conditioning unit is smaller than or equal to a water inlet temperature drop rate set value, the air conditioning unit is determined to have communication faults.
In the embodiment, when the air conditioning unit is determined to have communication abnormality by adopting multiple detection conditions according to the low-pressure operation rate of the suction end of the compressor of the air conditioning unit and the unit operation parameters of the air conditioning unit, whether the electronic expansion valve is abnormal or not is further determined according to the real-time voltage value of the suction end of the compressor, so that the abnormality detection of the electronic expansion valve during communication failure can be realized without depending on a manual detection mode, and the labor cost can be reduced; when the electronic expansion valve is determined to be abnormal, maintenance personnel can maintain the electronic expansion valve, so that the problem that the electronic expansion valve is abnormal due to communication faults in the operation process of the air conditioning unit can be solved, and meanwhile, fault reasons can be fed back to the maintenance personnel visually, so that the maintenance is not needed after the electronic expansion valve is detected to be abnormal manually, and the maintenance efficiency can be improved.
The fan frequency increasing rate of the air conditioning unit is a rate obtained by the controller according to a difference value between fan frequencies obtained before and after a preset interval and the preset interval; the electronic expansion valve of the air conditioning unit can automatically feed back the opening degrees before and after the preset interval to the controller, and then the controller can obtain the closing opening degree of the electronic expansion valve of the air conditioning unit according to the difference value between the opening degrees of the electronic expansion valve before and after the preset interval and the preset interval; the compressor frequency raising rate of the air conditioning unit is a rate obtained by the controller according to a difference value between compressor frequencies obtained before and after a preset interval and the preset interval; the water inlet temperature of the air conditioning unit is the rate obtained by the controller according to the difference value between the water inlet temperatures obtained before and after the preset interval and the preset interval.
For example, f Lifting of water The method comprises the steps of representing a fan frequency rising rate of an air conditioning unit, wherein f represents a set value that the fan frequency rising rate is too fast; k is Lower the main body The method comprises the steps that the closing opening of an electronic expansion valve of the air conditioning unit is shown, and K shows a set value of the closing opening of the electronic expansion valve; f Lifting of wine The method comprises the steps of representing the frequency rising rate of a compressor of the air conditioning unit, and F representing a set value that the frequency rising rate of the compressor is too high; t is Descend Showing the water inlet temperature reduction rate of the air conditioning unit, T showing the water inlet temperature reduction rate is an over-fast set value, if f Lifting of water F is less than or equal to f, and K Descend K or less, and F Lifting of wine Less than or equal to F, and T Descend And if the T is less than or equal to T, determining that the air conditioning unit has communication faults.
In one embodiment, the method further comprises: and when at least one of the operation parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
It can be understood that when at least one of the operating parameters of the devices of the air conditioning unit exceeds the corresponding set value, it indicates that the reason for the excessively fast low pressure of the air conditioning unit is not the abnormality of the electronic expansion valve caused by the communication fault, but the low pressure of the air conditioning unit drops excessively fast due to other reasons.
In some embodiments, the cause of the low pressure drop of the air conditioning unit being too fast has a mapping relationship with the operating parameters of the plurality of components of the air conditioning unit. For example, if the operating parameters of the various components of the air conditioning unit include the compressor ramp rate, the reason for the air conditioning unit low pressure drop is too fast is because the compressor is loaded too fast.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; at least one of the operating parameters of a plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operating parameters include at least one of the following: the fan frequency rising rate of the air conditioning unit is larger than a set value for over-high fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the compressor frequency increasing rate of the air conditioning unit is larger than a set value for the compressor frequency increasing rate to be too high; the inlet water temperature drop rate of the air conditioning unit is larger than the set value of the inlet water temperature drop rate.
In some embodiments, when at least one of the operating parameters of the plurality of components of the air conditioning pack includes a fan up rate of the air conditioning pack, the cause of the air conditioning pack under-voltage drop being too fast is because the fan up rate is too fast. When at least one of the operation parameters of the plurality of devices of the air conditioning unit comprises the closing opening of the electronic expansion valve of the air conditioning unit, the reason for causing the low pressure drop of the air conditioning unit to be too fast is that the electronic expansion valve is closed too fast. When at least one of the operating parameters of the plurality of components of the air conditioning unit includes a compressor ramp rate of the air conditioning unit, the reason for the low pressure drop of the air conditioning unit being too fast is that the compressor is loaded too fast. When at least one of the operating parameters of the plurality of devices of the air conditioning unit comprises the incoming water temperature drop rate of the air conditioning unit, the reason for causing the low pressure drop of the air conditioning unit to be too fast is that the ambient temperature drops too fast.
For example, f Lifting of wine The method comprises the steps of representing a fan frequency rising rate of an air conditioning unit, wherein f represents a set value that the fan frequency rising rate is too fast; k Descend The method comprises the steps of representing the closing opening of an electronic expansion valve of the air conditioning unit, and K represents a set value of the closing opening of the electronic expansion valve; f Lifting of water The method comprises the steps of representing the frequency rising rate of a compressor of the air conditioning unit, and F representing a set value that the frequency rising rate of the compressor is too high; t is Descend The water inlet temperature drop rate of the air conditioning unit is represented, T represents a set value that the water inlet temperature drop rate is too fast, and if at least one of the following conditions is met: f. of Lifting of wine >f，K Descend >K，F Lifting of wine >F，T Lower the main body >And T, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In combination with the above, as shown in fig. 3, a flow chart of an operation control method for an air conditioning unit is provided, which includes the following steps:
and S302, acquiring the low-pressure drop rate of the air conditioning unit.
S304, determining whether the low pressure drop rate is larger than a set value of the low pressure drop rate.
Specifically, when it is determined that the low pressure drop rate is greater than the low pressure drop rate excessively fast set value, S306 and S308 are executed; when it is determined that the low pressure drop rate is less than or equal to the low pressure drop rate excessively fast set value, S302 is performed.
S306, acquiring operating parameters of a plurality of devices of the air conditioning unit; the operation parameters of the plurality of devices of the air conditioning unit comprise the fan frequency increasing rate of the air conditioning unit, the closing opening degree of an electronic expansion valve of the air conditioning unit, the compressor frequency increasing rate of the air conditioning unit and the water inlet temperature decreasing rate of the air conditioning unit.
And S308, determining whether the operating parameters of the devices of the air conditioning unit do not exceed the corresponding set values.
Specifically, when it is determined that none of the operating parameters of the plurality of components of the air conditioning unit exceeds the corresponding set value, S310 is executed. That is, when the fan frequency-increasing rate of the air conditioning unit is less than or equal to the fan frequency-increasing rate over-speed set value, the closing opening of the electronic expansion valve of the air conditioning unit is less than or equal to the closing opening set value of the electronic expansion valve, the compressor frequency-increasing rate of the air conditioning unit is less than or equal to the compressor frequency-increasing rate over-speed set value, and the inlet water temperature drop rate of the air conditioning unit is less than or equal to the inlet water temperature drop rate over-speed set value, S310 is executed.
Specifically, when determining that at least one of the operating parameters of the plurality of devices of the air conditioning unit exceeds the corresponding set value, S302 is executed. That is, at least one of the operating parameters of the plurality of devices of the air conditioning unit exceeds the corresponding set value, including at least one of: the fan frequency rising rate of the air conditioning unit is larger than a set value for over-high fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the frequency increasing rate of a compressor of the air conditioning unit is larger than a set value for the frequency increasing rate of the compressor; the inlet water temperature drop rate of the air conditioning unit is larger than the set value of the inlet water temperature drop rate.
And S310, acquiring a real-time low pressure value of the air conditioning unit.
And S312, determining whether the real-time low-voltage value is smaller than the low-voltage protection value.
Specifically, when it is determined that the real-time low pressure value is smaller than the low pressure protection value, S314 is executed; when it is determined that the real-time low pressure value is greater than or equal to the low pressure protection value, S316 and S318 are performed.
And S314, determining the reason that the low pressure of the air conditioning unit set is too fast because the electronic expansion valve is abnormal, and starting low-pressure protection.
And S316, recording the times that the low pressure drop rate is larger than the set value of the low pressure drop rate within the preset time period.
S318, it is determined whether the number of times of recording is greater than 2.
Specifically, when it is determined that the number of times of recording is greater than 2, S320 is performed; when it is determined that the number of times of recording is less than or equal to 2, S302 is performed.
And S320, sending prompt information, wherein the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
For specific contents of S302 to S320, reference may be made to the foregoing adaptive description, and details are not repeated herein.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides an operation control device of the air conditioning unit, which is used for realizing the operation control method of the air conditioning unit. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so specific limitations in the following embodiments of the operation control device for one or more air conditioning units can be referred to the limitations on the operation control method for the air conditioning unit, and are not described again here.
In one embodiment, as shown in fig. 4, there is provided an operation control device of an air conditioning unit, including: an obtaining module 402, a first processing module 404, a second processing module 406, and a control module 408, wherein:
an obtaining module 402, configured to obtain a low-pressure drop rate of the air conditioning unit;
the first processing module 404 is configured to obtain a unit operation parameter when it is determined that the low pressure drop of the air conditioning unit is too fast according to that the low pressure drop rate is greater than a set value;
the second processing module 406 is configured to obtain a real-time low-voltage value of the air conditioning unit when it is determined that the air conditioning unit has a communication fault according to the unit operation parameter;
and the control module 408 is used for determining the reason that the low pressure of the air conditioning unit is too fast decreased because an electronic expansion valve of the air conditioning unit is abnormal if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
In one embodiment, the control module 408 is further configured to: if the real-time low-pressure value is larger than or equal to the low-pressure protection value of the air conditioning unit, recording the times of too fast low-pressure drop of the air conditioning unit in a preset time period; when the number of times that the low pressure of the air conditioning unit is reduced too fast within a preset time period is greater than the preset number of times, sending prompt information; the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
In one embodiment, the control module 408 is further configured to: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in the preset time period is less than or equal to the preset number of times.
In one embodiment, the unit operating parameters include operating parameters of a plurality of devices of the air conditioning unit, and the second processing module 406 is further configured to: and when the operating parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; a second processing module 406, further configured to: when the fan frequency-increasing rate of the air conditioning unit is smaller than or equal to a fan frequency-increasing rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency-increasing rate of the air conditioning unit is smaller than or equal to a compressor frequency-increasing rate set value, and the water inlet temperature drop rate of the air conditioning unit is smaller than or equal to a water inlet temperature drop rate set value, the air conditioning unit is determined to have communication faults.
In one embodiment, the second processing module 406 is further configured to: and when at least one of the operating parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; at least one of the operating parameters of a plurality of devices of the air conditioning unit exceeds a corresponding set value, including at least one of: the fan frequency rising rate of the air conditioning unit is larger than a set value for over-high fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the frequency increasing rate of a compressor of the air conditioning unit is larger than a set value for the frequency increasing rate of the compressor; the inlet water temperature drop rate of the air conditioning unit is larger than the set value of the inlet water temperature drop rate.
In one embodiment, the first processing module 404 is further configured to: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too fast low pressure drop according to the fact that the low pressure drop rate is smaller than or equal to the set value.
All or part of each module in the operation control device of the air conditioning unit can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the air conditioning unit, and can also be stored in a memory in the air conditioning unit in a software form, so that the processor can call and execute the corresponding operations of the modules.
In one embodiment, an air conditioning unit is provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to realize the following steps:
acquiring a low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value and the low pressure drop of the air conditioning unit is determined to be too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining that the reason for the too fast low pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
In one embodiment, the processor, when executing the computer program, further performs the steps of: if the real-time low-voltage value is larger than or equal to the low-voltage protection value of the air conditioning unit, recording the times of too fast low-voltage drop of the air conditioning unit in a preset time period; when the number of times that the low pressure of the air conditioning unit is reduced too fast within a preset time period is greater than the preset number of times, sending prompt information; the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in the preset time period is less than or equal to the preset number of times.
In one embodiment, the unit operating parameters include operating parameters of a plurality of devices of the air conditioning unit, and the processor when executing the computer program further performs the steps of: and when the operating parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; the processor, when executing the computer program, further performs the steps of: when the fan frequency-increasing rate of the air conditioning unit is smaller than or equal to a fan frequency-increasing rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency-increasing rate of the air conditioning unit is smaller than or equal to a compressor frequency-increasing rate set value, and the water inlet temperature drop rate of the air conditioning unit is smaller than or equal to a water inlet temperature drop rate set value, the air conditioning unit is determined to have communication faults.
In one embodiment, the processor when executing the computer program further performs the steps of: and when at least one of the operation parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; at least one of the operating parameters of a plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operating parameters include at least one of the following: the fan frequency rising rate of the air conditioning unit is larger than a set value of the fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the compressor frequency increasing rate of the air conditioning unit is larger than a set value for the compressor frequency increasing rate to be too high; the inlet water temperature drop rate of the air conditioning unit is larger than the set value of the inlet water temperature drop rate.
In one embodiment, the processor when executing the computer program further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too fast low pressure drop according to the fact that the low pressure drop rate is smaller than or equal to the set value.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value and the low pressure drop of the air conditioning unit is determined to be too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining that the reason for the too fast low pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the real-time low-voltage value is larger than or equal to the low-voltage protection value of the air conditioning unit, recording the times of too fast low-voltage drop of the air conditioning unit in a preset time period; when the times of the air conditioning unit low pressure over-fast drop within the preset time period are larger than the preset times, sending out prompt information; the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
In one embodiment, the computer program when executed by the processor further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in the preset time period is less than or equal to the preset number of times.
In one embodiment, the unit operating parameters include operating parameters of a plurality of devices of the air conditioning unit, and the computer program when executed by the processor further performs the steps of: and when the operating parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; the computer program when executed by the processor further realizes the steps of: when the fan frequency rising rate of the air conditioning unit is smaller than or equal to a fan frequency rising rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency rising rate of the air conditioning unit is smaller than or equal to a compressor frequency rising rate set value, and the water inlet temperature falling rate of the air conditioning unit is smaller than or equal to a water inlet temperature falling rate set value, the air conditioning unit is determined to have communication faults.
In one embodiment, the computer program when executed by the processor further performs the steps of: and when at least one of the operating parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; at least one of the operating parameters of a plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operating parameters include at least one of the following: the fan frequency rising rate of the air conditioning unit is larger than a set value of the fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the frequency increasing rate of a compressor of the air conditioning unit is larger than a set value for the frequency increasing rate of the compressor; the inlet water temperature drop rate of the air conditioning unit is larger than the set value of the inlet water temperature drop rate.
In one embodiment, the computer program when executed by the processor further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too fast low pressure drop according to the fact that the low pressure drop rate is smaller than or equal to the set value.
In one embodiment, a computer program product is provided, comprising a computer program which when executed by a processor performs the steps of:
acquiring a low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value and the low pressure drop of the air conditioning unit is determined to be too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining that the reason for the too fast low pressure drop of the air conditioning unit is the abnormality of an electronic expansion valve of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the real-time low-pressure value is larger than or equal to the low-pressure protection value of the air conditioning unit, recording the times of too fast low-pressure drop of the air conditioning unit in a preset time period; when the number of times that the low pressure of the air conditioning unit is reduced too fast within a preset time period is greater than the preset number of times, sending prompt information; the prompt information is used for prompting the electronic expansion valve of the air conditioning unit to be checked.
In one embodiment, the computer program when executed by the processor further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the number of times of the too fast low pressure drop of the air conditioning unit in the preset time period is less than or equal to the preset number of times.
In one embodiment, the unit operating parameters include operating parameters of a plurality of devices of the air conditioning unit, and the computer program when executed by the processor further performs the steps of: and when the operating parameters of a plurality of devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has a communication fault.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; the computer program when executed by the processor further realizes the steps of: when the fan frequency-increasing rate of the air conditioning unit is smaller than or equal to a fan frequency-increasing rate set value, the closing opening of an electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency-increasing rate of the air conditioning unit is smaller than or equal to a compressor frequency-increasing rate set value, and the water inlet temperature drop rate of the air conditioning unit is smaller than or equal to a water inlet temperature drop rate set value, the air conditioning unit is determined to have communication faults.
In one embodiment, the computer program when executed by the processor further performs the steps of: and when at least one of the operating parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
In one embodiment, the unit operating parameters include: the method comprises the following steps of (1) increasing the frequency rate of a fan of the air conditioning unit, closing and opening degrees of an electronic expansion valve of the air conditioning unit, increasing the frequency rate of a compressor of the air conditioning unit and decreasing the water inlet temperature of the air conditioning unit; at least one of the operating parameters of a plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operating parameters include at least one of the following: the fan frequency rising rate of the air conditioning unit is larger than a set value of the fan frequency rising rate; the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve; the frequency increasing rate of a compressor of the air conditioning unit is larger than a set value for the frequency increasing rate of the compressor; the dropping rate of the inlet water temperature of the air conditioning unit is larger than the set value of the too fast dropping rate of the inlet water temperature.
In one embodiment, the computer program when executed by the processor further performs the steps of: and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too fast low pressure drop according to the fact that the low pressure drop rate is smaller than or equal to the set value.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include a Read-Only Memory (ROM), a magnetic tape, a floppy disk, a flash Memory, an optical Memory, a high-density embedded nonvolatile Memory, a resistive Random Access Memory (ReRAM), a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM), a Phase Change Memory (PCM), a graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (12)

1. An operation control method of an air conditioning unit is characterized by comprising the following steps:
acquiring the low-pressure drop rate of the air conditioning unit;
when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters;
when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit;
and if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, determining the reason that the low pressure of the air conditioning unit is too fast reduced because an electronic expansion valve of the air conditioning unit is abnormal, and controlling the air conditioning unit to start low pressure protection.
2. The method of claim 1, further comprising:
if the real-time low-voltage value is larger than or equal to the low-voltage protection value of the air conditioning unit, recording the times of too fast low-voltage drop of the air conditioning unit in a preset time period;
when the times that the low pressure of the air conditioning unit is reduced too fast within a preset time period are larger than preset times, sending prompt information; and the prompt information is used for prompting to investigate the electronic expansion valve of the air conditioning unit.
3. The method of claim 2, further comprising:
and when the number of times of over-quick low-pressure drop of the air conditioning unit in a preset time period is less than or equal to the preset number of times, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
4. The method of claim 1, wherein the unit operating parameters include operating parameters of a plurality of devices of the air conditioning unit, and wherein determining that the air conditioning unit has a communication fault based on the unit operating parameters comprises:
and when the operating parameters of the devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has communication faults.
5. The method of claim 4, wherein the unit operating parameters comprise: the air conditioning unit comprises a fan frequency increasing rate of the air conditioning unit, a closing opening degree of an electronic expansion valve of the air conditioning unit, a compressor frequency increasing rate of the air conditioning unit and a water inlet temperature decreasing rate of the air conditioning unit;
when the operation parameters of the devices of the air conditioning unit do not exceed the corresponding set values, determining that the air conditioning unit has a communication fault comprises the following steps:
when the fan frequency rising rate of the air conditioning unit is smaller than or equal to a fan frequency rising rate set value, the closing opening of the electronic expansion valve of the air conditioning unit is smaller than or equal to a closing opening set value of the electronic expansion valve, the compressor frequency rising rate of the air conditioning unit is smaller than or equal to a compressor frequency rising rate set value, and the water inlet temperature falling rate of the air conditioning unit is smaller than or equal to a water inlet temperature falling rate set value, the communication fault of the air conditioning unit is determined.
6. The method of claim 4, further comprising:
and when at least one of the operation parameters of the devices of the air conditioning unit exceeds the corresponding set value, returning to the step of acquiring the low-pressure drop rate of the air conditioning unit.
7. The method of claim 6, wherein the unit operating parameters comprise: the air conditioning unit comprises a fan frequency increasing rate of the air conditioning unit, a closing opening degree of an electronic expansion valve of the air conditioning unit, a compressor frequency increasing rate of the air conditioning unit and a water inlet temperature decreasing rate of the air conditioning unit;
at least one of the operating parameters of the plurality of devices of the air conditioning unit exceeds a corresponding set value, and the operating parameters include at least one of the following:
the fan frequency rising rate of the air conditioning unit is larger than a set value for excessively high fan frequency rising rate;
the closing opening of an electronic expansion valve of the air conditioning unit is larger than a set value of the closing opening of the electronic expansion valve;
the frequency increasing rate of a compressor of the air conditioning unit is greater than a set value for the frequency increasing rate of the compressor;
and the water inlet temperature drop rate of the air conditioning unit is greater than the set value of the too fast water inlet temperature drop rate.
8. The method of claim 1, further comprising:
and returning to the step of acquiring the low pressure drop rate of the air conditioning unit when the air conditioning unit is determined not to have too fast low pressure drop according to the condition that the low pressure drop rate is smaller than or equal to the set value.
9. An operation control device of an air conditioning unit, characterized in that the device comprises:
the acquisition module is used for acquiring the low-pressure drop rate of the air conditioning unit;
the first processing module is used for acquiring unit operation parameters when the low pressure drop of the air conditioning unit is determined to be too fast according to the fact that the low pressure drop rate is larger than a set value;
the second processing module is used for acquiring a real-time low-voltage value of the air conditioning unit when the communication fault of the air conditioning unit is determined according to the unit operation parameters;
and the control module is used for determining the reason that the low pressure of the air conditioning unit is too fast reduced because an electronic expansion valve of the air conditioning unit is abnormal if the real-time low pressure value is smaller than the low pressure protection value of the air conditioning unit, and controlling the air conditioning unit to start low pressure protection.
10. An air conditioning assembly, characterized in that it comprises: the pressure sensor, the electronic expansion valve and the controller are arranged at the air suction end of the compressor;
the pressure sensor is used for detecting the pressure values of the air suction end of the compressor before and after a preset interval;
the controller is used for obtaining the low-pressure reduction rate of the air conditioning unit according to the pressure values before and after the preset interval detected by the pressure sensor; when the low pressure drop rate is larger than a set value, determining that the low pressure drop of the air conditioning unit is too fast, acquiring unit operation parameters; when the communication fault of the air conditioning unit is determined according to the unit operation parameters, acquiring a real-time low-voltage value of the air conditioning unit; and if the real-time low-pressure value is smaller than the low-pressure protection value of the air conditioning unit, determining the reason that the low pressure of the air conditioning unit drops too fast is that the electronic expansion valve is abnormal, and controlling the air conditioning unit to start low-pressure protection.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 8.
12. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 8 when executed by a processor.
CN202211640040.3A 2022-12-20 2022-12-20 Operation control method and device of air conditioning unit and air conditioning unit Pending CN115899950A (en)

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Application Number Priority Date Filing Date Title
CN202211640040.3A CN115899950A (en) 2022-12-20 2022-12-20 Operation control method and device of air conditioning unit and air conditioning unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116093885A (en) * 2023-04-12 2023-05-09 深圳市好盈科技股份有限公司 Low-voltage protection method and device applied to model airplane electronic speed regulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116093885A (en) * 2023-04-12 2023-05-09 深圳市好盈科技股份有限公司 Low-voltage protection method and device applied to model airplane electronic speed regulator

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