CN110779163A - Air conditioning unit control method and device - Google Patents
Air conditioning unit control method and device Download PDFInfo
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- CN110779163A CN110779163A CN201910998996.2A CN201910998996A CN110779163A CN 110779163 A CN110779163 A CN 110779163A CN 201910998996 A CN201910998996 A CN 201910998996A CN 110779163 A CN110779163 A CN 110779163A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The application discloses an air conditioning unit control method and device, wherein the method comprises the following steps: detecting whether a water flow switch of a water side system in an air conditioning unit is in a disconnected state; if the water flow switch is detected to be in an off state, acquiring the water inlet temperature and the water outlet temperature of the water side system in real time; and judging whether to control and start the fault protection of the water flow switch or not according to the water outlet temperature and the water inlet temperature. So, detect the rivers switch of the water side system in the air conditioning unit and be in the off-state after, not the fault protection of direct start rivers switch, but acquire the temperature of intaking and the temperature of going out of water side system, this temperature of intaking and the temperature of going out of water can reflect whether there is discharge, consequently judge according to this temperature of intaking and the temperature of going out of water whether control starts the fault protection of rivers switch, it is more accurate, compare with the correlation technique, avoided appearing shutting down because of rivers switch error protection and lead to the unable problem that gets into frostproofing operation.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method and device for an air conditioning unit.
Background
In winter, when the air conditioning unit machine does not heat, if the temperature is too low, the water side system can freeze and damage due to icing caused by too low water temperature, in order to avoid the situation, generally, the automatic anti-freezing control function of the water side system can be set, and when the anti-freezing operation condition is met and the anti-freezing operation is carried out, the water pump and the compressor are started to improve the water temperature.
In the related technology, a water outlet of a water side system is generally provided with a water flow switch, the water flow switch is a physical switch, when water flows through, a target sheet of the water flow switch is pushed by power of the water flow to act, at the moment, an internal circuit is in a closed state, namely, the water flow switch is detected to be in a normal state, the internal circuit is disconnected under the condition that the water flow switch is damaged, when the water flow switch is detected to be disconnected, the water flow switch is reported to have a fault, the fault protection of the water flow switch is started, the machine is stopped, when the motion quantity of the target sheet is small due to the fact that the water flow is too small, or when the target sheet is frozen and the water flow cannot push the target sheet, the water flow switch is also in a disconnected state, at the moment, the water flow switch fault is reported to be stopped and protected, but at the time, the water side system also has water, if the problem of, the heat exchanger of the water side system can be frozen and damaged due to the error protection of the water flow switch.
Disclosure of Invention
The application aims to provide an air conditioning unit control method and device to solve the problem that operation cannot be prevented from being frozen due to error protection of a water flow switch in the related technology.
The purpose of the application is realized by the following technical scheme:
an air conditioning unit control method comprises the following steps:
detecting whether a water flow switch of a water side system in an air conditioning unit is in a disconnected state;
if the water flow switch is detected to be in an off state, acquiring the water inlet temperature and the water outlet temperature of the water side system in real time;
and judging whether to control and start the fault protection of the water flow switch or not according to the water outlet temperature and the water inlet temperature.
Optionally, acquire in real time the temperature of intaking and the temperature of going out of water side system include:
the inlet water temperature and the outlet water temperature of the water side system are acquired regularly;
the fault protection that whether control starts the rivers switch according to water outlet temperature with water inlet temperature includes:
calculating the water inlet and outlet temperature difference information of the water outlet temperature and the water inlet temperature in each period;
comparing the calculated temperature difference information of the inlet water and the outlet water with preset temperature difference information;
if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, determining that the fault protection of the water flow switch is not started;
and if the water inlet and outlet temperature difference information is smaller than the preset temperature difference information, determining to start the fault protection of the water flow switch.
Optionally, the method further includes:
if the water flow switch is detected to be in a disconnected state, monitoring the disconnection time of the water flow switch;
the determining to activate the failsafe of the flow switch includes:
comparing the disconnection time with a preset time;
and if the disconnection time is greater than or equal to the preset time, determining to start the fault protection of the water flow switch.
Optionally, the method further includes:
detecting whether the anti-freezing operation condition is met or not in real time;
if the anti-freezing operation condition is met, starting anti-freezing operation;
and if the anti-freezing operation condition is not met, not starting the anti-freezing operation.
Optionally, if the anti-freeze operation is started, the method further includes:
if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, or if the disconnection time is smaller than the preset time, calculating the change information of the water outlet temperature in each period;
and controlling the frequency of a compressor of the air conditioning unit according to the change information of the outlet water temperature.
Optionally, the controlling the frequency of the compressor of the air conditioning unit according to the change information of the outlet water temperature includes:
comparing the change information of the outlet water temperature with a preset change information interval; the preset change information interval comprises a first change information interval, a second change information interval and a third change information interval, wherein the changes of the first change information interval, the second change information interval and the third change information interval are sequentially increased;
if the change information of the outlet water temperature is in the first change information interval, controlling and increasing the frequency of the compressor;
if the change information of the outlet water temperature is in the second change information interval, keeping the current frequency of the compressor;
and if the change information of the outlet water temperature is in the third change information interval, controlling to reduce the frequency of the compressor.
Optionally, the third change information interval includes a fourth change information interval and a fifth change information interval, where changes increase in sequence;
the controlling reduces the frequency of the compressor, including:
if the change information of the outlet water temperature is in the fourth change information interval, controlling the frequency of the compressor to reduce a first preset frequency value;
if the change information of the outlet water temperature is in the fifth change information interval, controlling the frequency of the compressor to reduce a second preset frequency value; the second preset frequency value is greater than the first preset frequency value.
Optionally, the change information of the outlet water temperature includes a change amount of the outlet water temperature or a change rate of the outlet water temperature; the calculating of the change information of the outlet water temperature in each period comprises: calculating the variation of the outlet water temperature in each period; or calculating the variation of the outlet water temperature in each period, and calculating the variation rate of the outlet water temperature according to the period time, the variation of the outlet water temperature calculated in the current period and the variation of the outlet water temperature calculated in the previous period;
and/or the water inlet and outlet temperature difference information comprises the water inlet and outlet temperature difference or the water inlet and outlet temperature difference change rate of the water outlet temperature and the water inlet temperature; the calculating of the inlet and outlet water temperature difference information of the outlet water temperature and the inlet water temperature in each period comprises the following steps: calculating the water inlet and outlet temperature difference between the water outlet temperature and the water inlet temperature in each period; or calculating the water inlet and outlet temperature difference of the water outlet temperature and the water inlet temperature in each period, and calculating the change rate of the water inlet and outlet temperature difference according to the period time, the water inlet and outlet temperature difference calculated in the current period and the water inlet and outlet temperature difference calculated in the previous period.
An air conditioning unit control device comprising:
the disconnection detection module is used for detecting whether a water flow switch of a water side system in the air conditioning unit is in a disconnection state or not;
the temperature acquisition module is used for acquiring the water inlet temperature and the water outlet temperature of the water side system if the water flow switch is detected to be in a disconnected state;
and the protection judging module is used for judging whether to control and start the fault protection of the water flow switch according to the water outlet temperature and the water inlet temperature.
An air conditioning unit control device comprising:
a processor, and a memory coupled to the processor;
the memory is used for storing a computer program;
the processor is configured to invoke and execute the computer program in the memory to perform the method of any of the above.
This application adopts above technical scheme, has following beneficial effect:
in the scheme of this application, detect the rivers switch of water side system in air conditioning unit and be in the off-state after, not the fault protection of direct start rivers switch, but acquire the temperature of intaking and the temperature of water side system, this temperature of intaking and the temperature of water of going out can reflect whether there is discharge, consequently judge according to this temperature of intaking and the temperature of water of going out whether control starts the fault protection of rivers switch, control more accurately, compare with above-mentioned correlation technique, the problem of stopping because of rivers switch error protection and leading to unable entering frostproofing operation has been avoided appearing.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an air conditioning unit control method according to an embodiment of the present application.
Fig. 2 is a flowchart of an air conditioning unit control method according to another embodiment of the present application.
Fig. 3 is a schematic structural diagram of an air conditioning unit control device according to another embodiment of the present application.
Fig. 4 is a schematic structural diagram of an air conditioning unit control device according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
Referring to fig. 1, fig. 1 is a flowchart of an air conditioning unit control method according to an embodiment of the present application.
As shown in fig. 1, the present embodiment provides an air conditioning unit control method, which is executed by an air conditioning unit or an air conditioning unit control device or a functional module based on software and/or hardware therein, and the method at least includes the following steps:
and 11, detecting whether a water flow switch of a water side system in the air conditioning unit is in an off state.
And step 12, acquiring the water inlet temperature and the water outlet temperature of the water side system in real time if the water flow switch is detected to be in the off state.
Specifically, the temperature of the inlet water and the temperature of the outlet water can be obtained through temperature sensing bags arranged at the water inlet and the water outlet of the water side system.
And step 13, judging whether to control the start of the fault protection of the water flow switch or not according to the water outlet temperature and the water inlet temperature.
In the scheme of this application, detect the rivers switch of water side system in air conditioning unit and be in the off-state after, not the fault protection of direct start rivers switch, but acquire the temperature of intaking and the temperature of water side system, this temperature of intaking and the temperature of water of going out can reflect whether there is discharge, consequently judge according to this temperature of intaking and the temperature of water of going out whether control starts the fault protection of rivers switch, it is more accurate, compare with above-mentioned correlation technique, the problem of stopping because of rivers switch error protection and leading to unable entering frostproofing operation has been avoided appearing.
It is understood that the control method may further include: detecting whether the anti-freezing operation condition is met or not in real time; if the anti-freezing operation condition is met, starting anti-freezing operation; if the anti-freezing operation condition is not met, the anti-freezing operation is not started. When whether the anti-freezing operation condition is met or not is detected in real time, specifically, whether the temperature of the outlet water or the temperature of an anti-freezing temperature sensing bulb arranged near the water outlet is greater than or equal to a preset temperature threshold value or not can be judged, if yes, the water at the current temperature cannot be frozen, the anti-freezing operation can not be started, and if not, the water at the current temperature cannot be frozen, and the anti-freezing operation needs to be started. When the anti-freezing operation is started, specifically, the water pump of the water side system is started first, then the compressor is started to perform heating operation, and when the anti-freezing operation is performed, the frequency of the compressor is required to be lower, so long as the water is ensured not to be frozen.
In some embodiments, in step 12, the water inlet temperature and the water outlet temperature of the water side system are obtained in real time, and the specific implementation manner may include: and the inlet water temperature and the outlet water temperature of the water side system are acquired periodically. Therefore, the real-time monitoring of the water temperature can be realized. The cycle time may be set according to actual needs, and is not specifically limited herein. When there is discharge, rivers pass through the heat exchanger of water side system, the temperature of outlet water can rise, the ability of compressor can exert along with the formation of system height low pressure, outlet water temperature has a process from low to high, but the temperature of intaking is unchangeable basically or change slower, business turn over temperature difference can quick grow this moment, if there is not discharge, it is intake, the delivery port does not have water to pass through, then the temperature of intaking, outlet water temperature just do not have obvious temperature variation, based on this, among the above-mentioned step 13, according to outlet water temperature and the temperature of intaking, judge whether control starts the fault protection of rivers switch, concrete implementation can include: calculating the inlet and outlet water temperature difference information of the outlet water temperature and the inlet water temperature in each period; comparing the calculated temperature difference information of the inlet water and the outlet water with preset temperature difference information; if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, determining that the fault protection of the water flow switch is not started; and if the water inlet and outlet temperature difference information is less than the preset temperature difference information, determining to start the fault protection of the water flow switch. In this embodiment, the preset temperature difference information is set, when the inlet and outlet temperature difference information is greater than or equal to the preset temperature difference information, it is considered that water flows pass through, at this time, conditions such as damage of a water flow switch, small water flow of a water side system, freezing of a target sheet of the water flow switch and the like may occur, but water flow still exists, the water flow switch cannot be in an on-state, at this time, fault protection of the water flow switch cannot be started, when the inlet and outlet temperature difference information is less than the preset temperature difference information, it is considered that no water flows pass through, and fault protection of the water flow switch can be started to stop.
In some embodiments, if the water flow switch is detected to be in the off state, the off time of the water flow switch may be monitored, and specifically, the off time of the water flow switch may be continuously recorded. Correspondingly, the above-mentioned determining to start the fault protection of the water flow switch may specifically be implemented by: comparing the disconnection time with a preset time; and if the disconnection time is greater than or equal to the preset time, determining to start the fault protection of the water flow switch. When the rivers switch is in the off-state for a long time, water can slowly run off, in this embodiment, through the off-time of rivers switch, further verify whether discharge in addition, when guaranteeing that rivers switch fault protection shut down, do not have discharge or discharge very few to avoid the heat exchanger of water side system to freeze and damage, further improved the reliability. In addition, under the condition that the water flow is very small, if the compressor is started to operate, the water temperature can rise too fast to cause overheating protection, and in this respect, the compressor is not suitable to be started to operate, and the water flow switch can be started to carry out fault protection and stop.
If the disconnection time is less than the preset time, the water storage capacity of the heat exchanger of the water side system meets the requirement of entering the anti-freezing operation, the fault protection of the water flow switch is not started, if the anti-freezing operation condition is met, the anti-freezing operation can be normally started until the anti-freezing operation condition is not met, and the anti-freezing operation condition is quitted.
The duration of the preset time can be set according to actual needs, and is not specifically limited herein.
In some embodiments, if the freeze protection operation is initiated, the method further comprises: if the temperature difference information of the inlet water and the outlet water is larger than or equal to the preset temperature difference information, or if the disconnection time is smaller than the preset time, calculating the change information of the outlet water temperature in each period; and controlling the frequency of a compressor of the air conditioning unit according to the change information of the outlet water temperature. Because the frequency of compressor can influence the speed of intensification, in this embodiment, through the frequency of control compressor, the change of control temperature guarantees that the temperature rises steadily, avoids the temperature to rise too fast and causes the damage to heat exchanger and compressor.
Specifically, according to the change information of leaving water temperature, the frequency of the compressor of control air conditioning unit includes: comparing the change information of the outlet water temperature with a preset change information interval; the preset change information interval comprises a first change information interval, a second change information interval and a third change information interval, wherein the changes of the first change information interval, the second change information interval and the third change information interval are sequentially increased; if the change information of the outlet water temperature is in the first change information interval, controlling and improving the frequency of the compressor; if the change information of the outlet water temperature is in the second change information interval, keeping the frequency of the current compressor; and if the change information of the outlet water temperature is in the third change information interval, controlling to reduce the frequency of the compressor.
When the change of the outlet water temperature is obvious, the frequency of the compressor can be reduced to prevent the heat exchanger from being damaged due to the fact that the outlet water temperature rises too fast, when the change of the outlet water temperature is not obvious, the compressor can be kept unchanged, when the change of the outlet water temperature is very low or even negative, the frequency of the compressor can be properly improved, the anti-freezing effect is better, and therefore the stable rising of the water temperature can be guaranteed.
In some embodiments, optionally, the third variation information interval includes a fourth variation information interval and a fifth variation information interval, where the variation increases in sequence; correspondingly, the above control to reduce the frequency of the compressor may include: if the change information of the outlet water temperature is in the fourth change information interval, controlling the frequency of the compressor to reduce the first preset frequency value; if the change information of the outlet water temperature is in the fifth change information interval, controlling the frequency of the compressor to reduce a second preset frequency value; the second predetermined frequency value is greater than the first predetermined frequency value. In the embodiment, the change of the outlet water temperature is too obvious, the frequency of the compressor is reduced by a large amount of data, the compressor is prevented from being damaged due to overhigh high pressure caused by too fast rising of the water temperature, and the reliability is further improved.
The specific values of the first preset frequency value and the second preset frequency value may be set according to actual needs, and are not limited herein.
The change information of the outlet water temperature comprises the change amount of the outlet water temperature or the change rate of the outlet water temperature; correspondingly, the specific implementation manner of calculating the change information of the outlet water temperature in each period may include two, one is to calculate the change amount of the outlet water temperature in each period, and the other is to calculate the change amount of the outlet water temperature in each period, and calculate the change amount according to the period time and the current periodFor example, △ T is calculated as the variation of the outlet water temperature every 2 seconds
Go out，△T
Go out＝T
Go out 2-T
Go out 1And calculating the change rate P of the water temperature (△ T)
Go out 2-△T
Go out 1) /2, wherein, T
Go out 1Is the outlet water temperature at the beginning of a cycle, T
Go out 2Outlet water temperature at the end of a cycle, △ T
Go outIs the variation of the outlet water temperature of one period, △ T
Go out 1△ T is the variation of the outlet water temperature of the previous period
Go out 2The variation of the effluent temperature in the current period is shown, and 2 is the period time.
The water inlet and outlet temperature difference information comprises the water inlet and outlet temperature difference or the water inlet and outlet temperature difference change rate of the water outlet temperature and the water inlet temperature in each period, and the water inlet and outlet temperature difference information of the water outlet temperature and the water inlet temperature in each period is calculated correspondingly, the specific mode comprises the following two modes of calculating the water inlet and outlet temperature difference of the water outlet temperature and the water inlet temperature in each period, and calculating the water inlet and outlet temperature change rate according to the period time, the water inlet and outlet temperature difference calculated in the current period and the water inlet and outlet temperature difference calculated in the previous period, for example, calculating the water inlet and outlet temperature difference △ T once every 2
Go out-T
IntoAnd calculating the change rate K of the temperature difference between inlet water and outlet water (△ T)
2-△T
1) /2, wherein, T
Go outTemperature of water leaving, T
Into△ T is a cycle inlet and outlet water temperature difference for inlet water temperature, △ T
1△ T, the difference between the inlet and outlet water temperatures of the previous cycle
2The temperature difference of inlet and outlet water in the current period is 2, and the period time is 2.
A specific application scenario is taken as an example, and a more detailed description is provided below for the control method of the air conditioning unit provided in the embodiment of the present application.
The specific flow of this embodiment refers to the air conditioning unit control method shown in fig. 2.
As shown in fig. 2, step 21, detecting that the anti-freezing operation condition is met, entering an anti-freezing operation, starting the water pump, at this time, step 22, detecting that the water flow switch is in an off state, continuously recording the off time Q of the water flow switch, executing step 23, controlling the preset frequency F to start the heating operation of the compressor, and executing step 24.
It should be noted that 2 seconds in this step is only an example and not a limitation.
And 26, judging whether K is larger than or equal to A, wherein A is a preset temperature difference change rate, if so, executing a step 27, otherwise, executing a step 28.
The step is a specific implementation manner for comparing the calculated water inlet and outlet temperature difference information with the preset temperature difference information.
And 27, determining not to start the fault protection of the water flow switch, and executing the step 210.
And 28, judging whether Q is larger than or equal to t, wherein t is preset time, if so, executing step 29, and otherwise, executing step 210.
This step is a specific implementation manner of comparing the off-time with the preset time.
And step 29, determining to start the fault protection of the water flow switch.
It should be noted that 2 seconds in this step is only an example and not a limitation.
And step 211, when P is larger than or equal to a, controlling the frequency of the compressor to be reduced by 8Hz, when a is larger than or equal to P is larger than or equal to b, controlling the frequency of the compressor to be reduced by 3Hz, when b is larger than or equal to P is larger than or equal to c, keeping the frequency of the current compressor, when P is smaller than or equal to c, controlling the frequency of the compressor to be increased by 3Hz, and executing step 210.
Wherein a, b, and c are each threshold values of the variation information sections, p.ltoreq.c is the first variation information section, b.gtoreq.p.gtoreq.c is the second variation information section, a.gtoreq.p.gtoreq.b is the fourth variation information section, and p.gtoreq.a is the fifth variation information section. The first preset frequency value is 3Hz, and the second preset frequency value is 8Hz, which is only an example, and other frequency values may also be set.
And if the anti-freezing operation condition is not met, the anti-freezing operation is quitted.
Through the control strategy, the anti-freezing operation can be effectively prevented from being prevented, the anti-freezing operation efficiency is improved, the water temperature can be controlled to stably rise, and the risk that the heat exchanger and the compressor are damaged due to too fast rising is avoided.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an air conditioning unit control apparatus according to another embodiment of the present application.
As shown in fig. 3, the present embodiment provides an air conditioning unit control apparatus, including:
the disconnection detection module 301 is used for detecting whether a water flow switch of a water side system in the air conditioning unit is in a disconnection state;
a temperature obtaining module 302, configured to obtain an inlet water temperature and an outlet water temperature of the water side system if it is detected that the water flow switch is in an off state;
and the protection judging module 303 is configured to judge whether to control the start of the fault protection of the water flow switch according to the water outlet temperature and the water inlet temperature.
Optionally, the temperature obtaining module is specifically configured to:
the method comprises the steps of periodically obtaining the water inlet temperature and the water outlet temperature of a water side system;
the protection judgment module is specifically used for:
calculating the inlet and outlet water temperature difference information of the outlet water temperature and the inlet water temperature in each period;
comparing the calculated temperature difference information of the inlet water and the outlet water with preset temperature difference information;
if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, determining that the fault protection of the water flow switch is not started;
and if the water inlet and outlet temperature difference information is less than the preset temperature difference information, determining to start the fault protection of the water flow switch.
Optionally, the system further comprises a time monitoring module, configured to: if the water flow switch is detected to be in an off state, monitoring the off time of the water flow switch;
when confirming the fault protection who starts water flow switch, protection judgment module specifically is used for:
comparing the disconnection time with a preset time;
and if the disconnection time is greater than or equal to the preset time, determining to start the fault protection of the water flow switch.
Optionally, the system further comprises an anti-freezing module, configured to:
detecting whether the anti-freezing operation condition is met or not in real time;
if the anti-freezing operation condition is met, starting anti-freezing operation;
if the anti-freezing operation condition is not met, the anti-freezing operation is not started.
Optionally, if the anti-freezing operation is started, the anti-freezing module is further configured to:
if the temperature difference information of the inlet water and the outlet water is larger than or equal to the preset temperature difference information, or if the disconnection time is smaller than the preset time, calculating the change information of the outlet water temperature in each period;
and controlling the frequency of a compressor of the air conditioning unit according to the change information of the outlet water temperature.
Optionally, when the frequency of the compressor of the air conditioning unit is controlled according to the change information of the outlet water temperature, the anti-freezing module is specifically used for:
comparing the change information of the outlet water temperature with a preset change information interval; the preset change information interval comprises a first change information interval, a second change information interval and a third change information interval, wherein the changes of the first change information interval, the second change information interval and the third change information interval are sequentially increased;
if the change information of the outlet water temperature is in the first change information interval, controlling and improving the frequency of the compressor;
if the change information of the outlet water temperature is in the second change information interval, keeping the frequency of the current compressor;
and if the change information of the outlet water temperature is in the third change information interval, controlling to reduce the frequency of the compressor.
Optionally, the third change information interval includes a fourth change information interval and a fifth change information interval, where changes increase in sequence;
when the frequency of the compressor is controlled to be reduced, the anti-freezing module is specifically used for:
if the change information of the outlet water temperature is in the fourth change information interval, controlling the frequency of the compressor to reduce the first preset frequency value;
if the change information of the outlet water temperature is in the fifth change information interval, controlling the frequency of the compressor to reduce a second preset frequency value; the second predetermined frequency value is greater than the first predetermined frequency value.
Optionally, the change information of the outlet water temperature includes a change amount of the outlet water temperature or a change rate of the outlet water temperature; when the change information of the outlet water temperature in each period is calculated, the anti-freezing module is specifically used for: calculating the variation of the water outlet temperature in each period; or calculating the variation of the outlet water temperature in each period, and calculating the variation rate of the water temperature according to the period time, the variation of the outlet water temperature calculated in the current period and the variation of the outlet water temperature calculated in the previous period;
and/or the inlet and outlet water temperature difference information comprises the inlet and outlet water temperature difference or the inlet and outlet water temperature difference change rate of the outlet water temperature and the inlet water temperature; when the inlet and outlet water temperature difference information of the outlet water temperature and the inlet water temperature in each period is calculated, the anti-freezing module is specifically used for: calculating the temperature difference between inlet water and outlet water of the outlet water temperature and the inlet water temperature in each period; or calculating the water inlet and outlet temperature difference of the water outlet temperature and the water inlet temperature in each period, and calculating the change rate of the water inlet and outlet temperature difference according to the period time, the water inlet and outlet temperature difference calculated in the current period and the water inlet and outlet temperature difference calculated in the previous period.
The specific implementation of the air conditioning unit control device provided in the embodiment of the present application may refer to the implementation of the air conditioning unit control method in any of the above examples, and details are not described here.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an air conditioning unit control device according to an embodiment of the present application.
As shown in fig. 4, the present embodiment provides an air conditioning unit control apparatus, including:
a processor 401, and a memory 402 connected to the processor 401;
the memory 402 is used to store computer programs;
the processor 401 is configured to call and execute a computer program in the memory to execute the air conditioning unit control method according to any of the above embodiments.
The specific implementation of the air conditioning unit control device provided in the embodiment of the present application may refer to the implementation of the air conditioning unit control method in any of the above examples, and details are not described here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. An air conditioning unit control method is characterized by comprising the following steps:
detecting whether a water flow switch of a water side system in an air conditioning unit is in a disconnected state;
if the water flow switch is detected to be in an off state, acquiring the water inlet temperature and the water outlet temperature of the water side system;
and judging whether to control and start the fault protection of the water flow switch or not according to the water outlet temperature and the water inlet temperature.
2. The method of claim 1, wherein the obtaining the inlet water temperature and the outlet water temperature of the waterside system comprises:
the inlet water temperature and the outlet water temperature of the water side system are acquired regularly;
the fault protection that whether control starts the rivers switch according to water outlet temperature with water inlet temperature includes:
calculating the water inlet and outlet temperature difference information of the water outlet temperature and the water inlet temperature in each period;
comparing the calculated temperature difference information of the inlet water and the outlet water with preset temperature difference information;
if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, determining that the fault protection of the water flow switch is not started;
and if the water inlet and outlet temperature difference information is smaller than the preset temperature difference information, determining to start the fault protection of the water flow switch.
3. The method of claim 2, further comprising:
if the water flow switch is detected to be in a disconnected state, monitoring the disconnection time of the water flow switch;
the determining to activate the failsafe of the flow switch includes:
comparing the disconnection time with a preset time;
and if the disconnection time is greater than or equal to the preset time, determining to start the fault protection of the water flow switch.
4. The method of claim 3, further comprising:
detecting whether the anti-freezing operation condition is met or not in real time;
if the anti-freezing operation condition is met, starting anti-freezing operation;
and if the anti-freezing operation condition is not met, not starting the anti-freezing operation.
5. The method of claim 4, wherein if freeze protection operation is initiated, the method further comprises:
if the water inlet and outlet temperature difference information is larger than or equal to the preset temperature difference information, or if the disconnection time is smaller than the preset time, calculating the change information of the water outlet temperature in each period;
and controlling the frequency of a compressor of the air conditioning unit according to the change information of the outlet water temperature.
6. The method according to claim 5, wherein the controlling the frequency of the compressor of the air conditioning unit according to the variation information of the outlet water temperature comprises:
comparing the change information of the outlet water temperature with a preset change information interval; the preset change information interval comprises a first change information interval, a second change information interval and a third change information interval, wherein the changes of the first change information interval, the second change information interval and the third change information interval are sequentially increased;
if the change information of the outlet water temperature is in the first change information interval, controlling and increasing the frequency of the compressor;
if the change information of the outlet water temperature is in the second change information interval, keeping the current frequency of the compressor;
and if the change information of the outlet water temperature is in the third change information interval, controlling to reduce the frequency of the compressor.
7. The method according to claim 6, wherein the third change information section includes a fourth change information section and a fifth change information section, changes of which are sequentially increased;
the controlling reduces the frequency of the compressor, including:
if the change information of the outlet water temperature is in the fourth change information interval, controlling the frequency of the compressor to reduce a first preset frequency value;
if the change information of the outlet water temperature is in the fifth change information interval, controlling the frequency of the compressor to reduce a second preset frequency value; the second preset frequency value is greater than the first preset frequency value.
8. The method of claim 5, wherein the change information of the leaving water temperature comprises a change amount of the leaving water temperature or a change rate of the leaving water temperature; the calculating of the change information of the outlet water temperature in each period comprises: calculating the variation of the outlet water temperature in each period; or calculating the variation of the outlet water temperature in each period, and calculating the variation rate of the outlet water temperature according to the period time, the variation of the outlet water temperature calculated in the current period and the variation of the outlet water temperature calculated in the previous period;
and/or the water inlet and outlet temperature difference information comprises the water inlet and outlet temperature difference or the water inlet and outlet temperature difference change rate of the water outlet temperature and the water inlet temperature; the calculating of the inlet and outlet water temperature difference information of the outlet water temperature and the inlet water temperature in each period comprises the following steps: calculating the water inlet and outlet temperature difference between the water outlet temperature and the water inlet temperature in each period; or calculating the water inlet and outlet temperature difference of the water outlet temperature and the water inlet temperature in each period, and calculating the change rate of the water inlet and outlet temperature difference according to the period time, the water inlet and outlet temperature difference calculated in the current period and the water inlet and outlet temperature difference calculated in the previous period.
9. An air conditioning unit control apparatus characterized by comprising:
the disconnection detection module is used for detecting whether a water flow switch of a water side system in the air conditioning unit is in a disconnection state or not;
the temperature acquisition module is used for acquiring the water inlet temperature and the water outlet temperature of the water side system if the water flow switch is detected to be in a disconnected state;
and the protection judging module is used for judging whether to control and start the fault protection of the water flow switch according to the water outlet temperature and the water inlet temperature.
10. An air conditioning unit control apparatus characterized by comprising:
a processor, and a memory coupled to the processor;
the memory is used for storing a computer program;
the processor is configured to invoke and execute the computer program in the memory to perform the method of any one of claims 1-8.
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