CN112524781B - Control method, device, equipment and storage medium - Google Patents
Control method, device, equipment and storage medium Download PDFInfo
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- CN112524781B CN112524781B CN202011438306.7A CN202011438306A CN112524781B CN 112524781 B CN112524781 B CN 112524781B CN 202011438306 A CN202011438306 A CN 202011438306A CN 112524781 B CN112524781 B CN 112524781B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
Abstract
The embodiment of the application discloses a control method, which comprises the following steps: if a control instruction for indicating to close the electronic expansion valve corresponding to the target indoor unit is received, determining the current opening degree of the electronic expansion valve; controlling the electronic expansion valve to adjust the current opening according to the closing direction of the electronic expansion valve in response to a control instruction, collecting the first evaporation temperature of the target indoor unit evaporator and starting a timer to time; the timer is stopped to time when the timer is determined to be a preset time, and a second evaporation temperature of the evaporator and a first environment temperature of the current environment where the target indoor unit is located are collected; determining a state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature; if the state of the electronic expansion valve is not completely closed, determining a first target regulating opening degree; and controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree. The embodiment of the application also discloses a control device, equipment and a storage medium.
Description
Technical Field
The present application relates to the field of intelligent control technologies, and in particular, to a control method, apparatus, device, and storage medium.
Background
The multi-split air conditioning system refers to an air conditioning system in which one outdoor unit is connected with two or more indoor units through a pipe. The electronic expansion valve is a throttling device frequently used in a multi-split air conditioning system and is mainly used for adjusting the flow of a refrigerant. The opening and closing control of the electronic expansion valve is generally realized by open-loop control, and the opening degree of the electronic expansion valve is automatically adjusted according to the system state during the free running process, but when the electronic expansion valve is closed, the electronic expansion valve is generally realized by reversely adjusting a fixed opening degree corresponding to the current opening degree based on the current opening degree.
However, when the electronic expansion valve is closed by a fixed opening degree, the electronic expansion valve is easily not completely closed or the electronic expansion valve is stuck, so that the cooling or heating effect of the air conditioning system is affected, and the closing adjustment mode of the electronic expansion valve is single.
Summary of the invention
In order to solve the above technical problems, embodiments of the present application are expected to provide a control method, device, apparatus, and storage medium, so as to solve the problem that the closing adjustment manner of the electronic expansion valve is single at present, enrich the closing adjustment manner of the electronic expansion valve, effectively reduce the probability that the electronic expansion valve is not completely closed or stuck, and reduce the influence on the cooling or heating effect of the air conditioning system.
The technical scheme of the application is realized as follows:
in a first aspect, a control method, the method comprising:
if a control instruction for indicating to close the electronic expansion valve corresponding to the target indoor unit is received, determining the current opening degree of the electronic expansion valve;
after responding to the control instruction and controlling the electronic expansion valve to adjust the current opening according to the closing direction of the electronic expansion valve, acquiring a first evaporation temperature of an evaporator of the target indoor unit, and starting a timer to time;
when the timer is determined to be a preset time length, stopping timing the timer, and collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment where the target indoor unit is located;
determining a state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature;
if the state of the electronic expansion valve is not completely closed, determining a first target regulating opening degree;
and controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
In a second aspect, a control apparatus, the apparatus comprising: the device comprises a first determination unit, a first processing unit, a second determination unit, a third determination unit and a control unit; wherein:
the first determining unit is used for determining the current opening degree of the electronic expansion valve if a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit is received;
the first processing unit is used for responding to the control instruction, controlling the electronic expansion valve according to the closing direction of the electronic expansion valve to adjust the current opening degree, collecting the first evaporation temperature of the evaporator of the target indoor unit, and starting a timer to time;
the second processing unit is used for stopping the timing of the timer when the timing of the timer is determined to be a preset time length, and acquiring a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit;
the second determining unit is configured to determine a state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature;
the third determining unit is configured to determine a first target adjustment opening degree if the state of the electronic expansion valve is an incompletely closed state;
and the control unit is used for controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
In a third aspect, a control apparatus includes: a memory, a communication bus, and a processor; wherein:
the memory to store executable instructions;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor is configured to execute the control program stored in the memory to implement the steps of the control method according to any one of the above descriptions.
In a fourth aspect, a storage medium has stored thereon a control program which, when executed by a processor, implements the steps of the control method as in any one of the above.
In the embodiment of the application, if the control device receives a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit, the control device determines the current opening degree of the electronic expansion valve, responds to the control instruction to control the electronic expansion valve to adjust the current opening degree according to the closing direction of the electronic expansion valve, collects the first evaporation temperature of the evaporator of the target indoor unit, starts a timer to time, stops the timer to time when the timer times for a preset time duration, collects the second evaporation temperature of the evaporator and the first environmental temperature of the current environment of the target indoor unit, determines the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature and the first environmental temperature, and if the state of the electronic expansion valve is not completely closed, and finally, controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree. Therefore, when the electronic expansion valve corresponding to the target indoor unit needs to be closed, firstly, after the current opening degree of the electronic expansion valve is adjusted according to the closing direction according to the current opening degree of the electronic expansion valve, after the electronic expansion valve is closed for a period of time, the temperature change of the evaporator of the target indoor unit within a certain period of time and the temperature between the temperature of the evaporator and the ambient temperature are used for judging whether the electronic expansion valve is completely closed, when the electronic expansion valve is not completely closed, the first target adjustment opening degree is determined to continuously control the electronic expansion valve to adjust the first target adjustment opening degree according to the closing direction, the problem that the existing electronic expansion valve is single in closing adjustment mode is solved, the closing adjustment mode of the electronic expansion valve is enriched, the probability that the electronic expansion valve is not completely closed or blocked is effectively reduced, and the influence on the refrigerating or heating effect of an air-conditioning system is reduced.
Drawings
Fig. 1 is a schematic flowchart of a control method according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of another control method provided in the embodiment of the present application;
FIG. 3 is a schematic structural diagram of a multi-unit air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of another control method provided in the embodiment of the present application;
fig. 5 is a schematic flowchart of a control method according to another embodiment of the present application;
FIG. 6 is a schematic flow chart diagram of another control method according to another embodiment of the present application;
fig. 7 is a schematic structural diagram of a multi-split air conditioner according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a control device according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another control device provided in the embodiment of the present application;
fig. 10 is a schematic structural diagram of a control device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
An embodiment of the present application provides a control method, which is applied to a control device and is shown in fig. 1, and the method includes the following steps:
In the embodiment of the application, the control device is arranged in a multi-group tube air conditioner, which is also called a multi-split central air conditioner or a multi-split air conditioner, and is used for controlling the multi-group tube air conditioner. The control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit can be realized by the following steps: the sending keys are used for indicating a control instruction for closing the electronic expansion valves corresponding to the target indoor units, or the sending keys are sent to the control equipment through the internet equipment. In some application scenarios, the control instruction for instructing to turn off the electronic expansion valve corresponding to the target indoor unit may be implemented by an instruction for instructing to turn off the target indoor unit, that is, an instruction for controlling the target indoor unit to stop working, such as cooling or heating, and at this time, the target indoor unit does not consume energy. The target indoor unit includes at least one indoor unit of a multi-unit air conditioner.
And 102, responding to a control instruction, controlling the electronic expansion valve to adjust the current opening according to the closing direction of the electronic expansion valve, collecting the first evaporation temperature of the evaporator of the target indoor unit, and starting a timer to time.
In the embodiment of the application, after the control device receives the control instruction, the control device controls the electronic expansion valve to close, and the parameter adjusted during closing is the opening degree corresponding to the electronic expansion valve when the control instruction is received. When the evaporation temperature of the evaporator of the target indoor unit is collected, the collection can be realized by a temperature collector, such as a temperature sensor, arranged on the evaporator of the target indoor unit. The timer can be realized by a method of realizing a timing function through software or a hardware timing device. After the electronic expansion valve is closed, the parameters such as the evaporation temperature of the evaporator of the target indoor unit and the like are continuously detected to determine whether the electronic expansion valve is completely closed.
And 103, determining that the timing of the timer is a preset time, stopping timing of the timer, and collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit.
In the embodiment of the application, the preset duration is an empirical value obtained according to a large number of experiments or actual application scenarios, and in some application scenarios, the preset duration may also be obtained by setting by a user. The timer can be controlled to zero while the timer is stopped. The method for acquiring the ambient temperature of the current environment of the target indoor unit can be realized by a temperature acquisition device, such as a temperature sensor, which is arranged on the target indoor unit and used for acquiring the ambient temperature, or can be realized by that after the temperature is acquired by an independent temperature acquisition device which is in the same environment with the target indoor unit, the temperature acquisition device sends the acquired temperature to a control device corresponding to the target indoor unit. The first ambient temperature of the current environment of the target indoor unit may be, for example, an indoor ambient temperature at which the target indoor unit is currently located.
And 104, determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature and the first environment temperature.
In the embodiment of the present application, the first evaporation temperature, the second evaporation temperature, and the first ambient temperature are analyzed to determine the state of the electronic expansion valve. In this way, after the electronic expansion valve has performed a closing operation, it is determined whether the electronic expansion valve is completely closed by analyzing the evaporation temperatures of the target indoor unit before and after a period of time of the evaporator and the corresponding indoor ambient temperature. Here, since the electronic expansion valve has been subjected to a closing operation, the states of the electronic expansion valve include a closed state and an incompletely closed state. In other application scenarios, the state of the electronic expansion valve may include an open state, a closed state, and an incompletely closed state. The incompletely closed state is a state in which the electronic expansion valve is incompletely closed after the electronic expansion valve is closed and controlled.
And 105, if the state of the electronic expansion valve is an incomplete closing state, determining a first target regulating opening degree.
In the embodiment of the present application, if the state of the electronic expansion valve is a closed state, it indicates that the electronic expansion valve is completely closed, and no subsequent processing is required. And when the electronic expansion valve is in an incomplete closing state, determining a first target adjusting opening degree, wherein the first target adjusting opening degree is a fine adjusting opening degree for continuously closing the electronic expansion valve after the electronic expansion valve is closed. In some application scenarios, the first target adjustment opening degree may be an empirical value set by a user, but in the embodiment of the present application, the first target adjustment opening degree is determined according to a change of a temperature characteristic parameter caused after the electronic expansion valve is closed, and the temperature characteristic parameter caused after the electronic expansion valve is closed may be a temperature of an evaporator of a corresponding indoor unit, a corresponding indoor ambient temperature, and the like.
And 106, controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
In the embodiment of the application, because the electronic expansion valve is in an incompletely closed state, the electronic expansion valve is continuously controlled to be closed and adjusted according to the first target adjustment opening degree, so that the electronic expansion valve is completely closed. The influence on the refrigerating or heating effect of the air conditioning system when the electronic expansion valve is not completely closed is reduced.
In the embodiment of the application, if the control device receives a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit, the control device determines the current opening degree of the electronic expansion valve, responds to the control instruction and controls the electronic expansion valve to adjust the current opening degree according to the closing direction of the electronic expansion valve, acquires the first evaporation temperature of the evaporator of the target indoor unit, starting a timer to time, stopping the timer when the timer is determined to be a preset time, stopping the timer, then collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit, and determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature and the first environment temperature, determining a first target adjusting opening degree if the state of the electronic expansion valve is in an incompletely closed state, and finally controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree. Therefore, when the electronic expansion valve corresponding to the target indoor unit needs to be closed, firstly, after the current opening degree of the electronic expansion valve is adjusted according to the closing direction according to the current opening degree of the electronic expansion valve, after the electronic expansion valve is closed for a period of time, the temperature change of the evaporator of the target indoor unit within a certain period of time and the temperature between the temperature of the evaporator and the ambient temperature are used for judging whether the electronic expansion valve is completely closed, when the electronic expansion valve is not completely closed, the first target adjustment opening degree is determined to continuously control the electronic expansion valve to adjust the first target adjustment opening degree according to the closing direction, the problem that the existing electronic expansion valve is single in closing adjustment mode is solved, the closing adjustment mode of the electronic expansion valve is enriched, the probability that the electronic expansion valve is not completely closed or blocked is effectively reduced, and the influence on the refrigerating or heating effect of an air-conditioning system is reduced.
Based on the foregoing embodiments, an embodiment of the present application provides a control method, as shown in fig. 2, applied to a control device, the method including the steps of:
and step 201, if a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit is received, determining the current opening degree of the electronic expansion valve.
In the embodiment of the present application, as shown in fig. 3, a schematic diagram of a multi-tube air conditioner is illustrated, including an outdoor unit 31, an indoor unit 32, an indoor unit 33, an indoor unit 34, an electronic expansion valve 321, an electronic expansion valve 331, and an electronic expansion valve 341; the indoor units 32, 33 and 34 are respectively and correspondingly provided with a temperature collecting device 322, a temperature collecting device 332 and a temperature collecting device 342 for collecting the evaporating temperature of the evaporator of each indoor unit, and it is assumed that the indoor units 32, 33 and 34 are respectively arranged in 3 different rooms, wherein when the indoor unit 32 receives an off command in the switch commands, it is determined that a control command for instructing to close the electronic expansion valve 321 is received, and it is determined that the current opening of the electronic expansion valve 321 when the control command is received is P.
In other embodiments of the present application, the control device of the multi-tube air conditioner responds to the control command, and the control device controls the electronic expansion valve to perform the closing operation on the electronic expansion valve based on the current opening degree, i.e., the current opening degree is adjusted in the reverse direction according to the closing direction. The temperature acquisition device 322 disposed in the indoor unit 32 acquires the first evaporation temperature T11 of the evaporator of the indoor unit 32, and starts a timer, which may be a hardware timer, for example.
And 203, determining that the timing of the timer is a preset time duration, stopping timing of the timer, and collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit.
In the embodiment of the present application, when the control device determines that the timer is counted as the preset time length S, the timer is stopped to count time, and the second evaporation temperature T12 of the evaporator of the indoor unit 32 and the room temperature of the room in which the indoor unit 32 is currently located, that is, the first ambient temperature, are continuously collected by the temperature collection device 322 disposed on the indoor unit 32, which are T2.
In the embodiment of the present application, the first temperature difference Δ T1 is T11-T12.
A second temperature difference between the second evaporation temperature and the first ambient temperature is determined 205.
In the embodiment of the present application, the second temperature difference Δ T2 is T12-T2.
And step 206, determining the state of the electronic expansion valve based on the first temperature difference value and the second temperature difference value.
In the embodiment of the present application, the first temperature difference Δ T1 and the second temperature difference Δ T2 are analyzed to determine the state of the electronic expansion valve.
And step 207, determining the current working parameters of the compressor corresponding to the target indoor unit if the state of the electronic expansion valve is not completely closed.
In this embodiment of the application, after analyzing the first temperature difference Δ T1 and the second temperature difference Δ T2 and determining that the state of the electronic expansion valve is an incompletely closed state, a current operating parameter of a compressor corresponding to the indoor unit 32 is determined, for example, the current operating parameter of the compressor may be a current compression frequency F of the compressor, and in some application scenarios, the compression frequency of the compressor may also be referred to as an operating frequency of the compressor.
And 208, determining a first target adjusting opening degree based on the current working parameter, the preset time length and the preset evaporation temperature rise value.
In the embodiment of the present application, the preset evaporating temperature rising value is an empirical value obtained by a large number of experiments or practical applications. And analyzing the current working parameter, the preset time length and the preset evaporation temperature rise value, and determining a first target adjusting opening degree delta P1.
And 209, controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
In the embodiment of the present application, since the electronic expansion valve is not completely closed, in order to ensure that the electronic expansion valve is completely closed, in the current state of the electronic expansion valve, the first target adjustment opening degree is continuously adjusted according to the closing direction, so as to further close the electronic expansion valve.
Based on the foregoing embodiments, in other embodiments of the present application, the step 206 performed by the control device may be implemented by the step 206a or the step 206 b. If the absolute value of the first temperature difference is less than or equal to the predetermined evaporating temperature rise value and the absolute value of the second temperature difference is greater than or equal to the predetermined temperature threshold, selectively performing step 206 a; if the first temperature difference is greater than the predetermined evaporating temperature rise value and/or the absolute value of the second temperature difference is less than the predetermined temperature threshold, the step 206b is selectively executed:
step 206a, if the absolute value of the first temperature difference is less than or equal to the preset evaporating temperature rise value and the absolute value of the second temperature difference is greater than or equal to the preset temperature threshold, determining that the state of the electronic expansion valve is not completely closed.
In the embodiment of the present application, the preset temperature threshold is an empirical value determined according to a relationship between the evaporator temperature and the ambient temperature after the electronic expansion valve is closed in a large number of experiments or practical applications. And when the first temperature difference value delta T1 is greater than or equal to a preset evaporation temperature rise value delta T1 and the second temperature difference value delta T2 is greater than or equal to a preset temperature threshold value delta T2, determining that the state of the electronic expansion valve is not completely closed.
And step 206b, if the first temperature difference is greater than the preset evaporation temperature rise value and/or the absolute value of the second temperature difference is less than the preset temperature threshold value, determining that the state of the electronic expansion valve is a closed state.
In the embodiment of the application, when the first temperature difference Δ T1 > the preset evaporating temperature ramp-up value Δ T1, the second temperature difference Δ T2 < the preset temperature threshold Δ T2, or the first temperature difference Δ T1 > the preset evaporating temperature ramp-up value Δ T1 and the second temperature difference Δ T2 < the preset temperature threshold Δ T2, the state of the electronic expansion valve is determined to be a closed state. After the step 206b is executed, the control device ends the relevant acquisition operation for the indoor unit 32.
Based on the foregoing embodiment, in other embodiments of the present application, the step 208 executed by the control device may be implemented by the steps 208a to 208 c:
step 208a, a first product of the predetermined evaporating temperature ramp-up value and the predetermined coefficient is determined.
In the embodiment of the present application, the predetermined coefficient μ is an empirical value obtained by a large number of experiments or practical applications. The first product Δ t1 μ.
And 208b, determining a second product of the current working frequency and the preset time length.
Wherein the current operating parameter comprises a current operating frequency.
In this embodiment of the present application, the current operating parameter of the compressor corresponding to the target indoor unit includes a current operating frequency F of the compressor corresponding to the target indoor unit. The second product is F × S.
And step 208c, determining the ratio of the first product to the second product to obtain the first target adjustment opening degree.
In the embodiment of the present application, the first target adjustment opening Δ P1 is the first product/second product (Δ t1 μ)/(F S).
Based on the foregoing embodiment, in another embodiment of the present application, referring to fig. 4, after the first target adjustment opening degree of the electronic expansion valve is adjusted, it is further necessary to confirm whether the electronic expansion valve is completely closed, so that the control device may further perform steps 210 to 216 after continuing to perform step 209:
and step 210, collecting a third evaporation temperature of the evaporator, and starting a timer to time.
And step 211, when the timer is determined to be the preset time, stopping the timer to time, and collecting a fourth evaporation temperature of the evaporator and a second environment temperature of the current environment of the target indoor unit.
And step 212, determining the state of the electronic expansion valve based on the third evaporation temperature, the fourth evaporation temperature and the second ambient temperature.
In the embodiment of the present application, after the control device executes step 212, it can choose to execute step 213 or steps 214-216. If the target electronic expansion state is a closed state, the control device selectively performs step 213, and if the electronic expansion valve is not in a fully closed state, the control device selectively performs steps 214 to 216:
in step 213, if the target electron expansion state is the off state, the adjustment operation is ended.
And 214, if the state of the electronic expansion valve is not completely closed, determining a second target adjusting opening degree.
And step 215, controlling the electronic expansion valve to adjust the second target adjusting opening degree according to the closing direction based on the second target adjusting opening degree.
And step 216, collecting a fourth evaporation temperature of the evaporator, repeating the process until the state of the electronic expansion valve is determined to be a closed state, or repeating the process for adjusting for a preset number of times, and ending the adjustment operation.
In the embodiment of the present application, the preset times are experience times obtained according to a large number of experiments or application data.
It should be noted that steps 210 to 216 are repeated operations corresponding to "acquiring the first evaporation temperature of the evaporator of the target indoor unit and starting the timer to perform timing" to step 209 in step 202. Therefore, when the electronic expansion valve is not completely closed, the small-amplitude target regulating opening degrees such as the first target regulating opening degree and the second target regulating opening degree are repeatedly determined for multiple times, the situation that the electronic expansion valve is blocked due to the fact that the regulating opening degrees are adjusted greatly when the electronic expansion valve is controlled to be completely closed can be effectively avoided, the probability that the electronic expansion valve is blocked is effectively reduced, the problem that refrigerating or heating effects of an indoor unit are poor due to the fact that the electronic expansion valve is not closed is effectively reduced, and the energy-saving efficiency of the multiple groups of air conditioners is effectively improved.
Based on the foregoing embodiment, in another embodiment of the present application, referring to fig. 5, after the control device repeats step 216, the control device is further configured to perform steps 217 to 220:
and step 217, collecting the fifth evaporation temperature of the evaporator, and starting a timer for timing.
And step 218, stopping timing of the timer when the timing of the timer is determined to be the preset time duration, and collecting the sixth evaporation temperature of the evaporator.
In step 219, a third temperature difference between the sixth evaporation temperature and the fifth evaporation temperature is determined.
And step 220, outputting prompt information for indicating the abnormality of the electronic expansion valve if the absolute value of the third temperature difference is less than or equal to the preset evaporation temperature rise value.
In the embodiment of the application, the output prompt message can be in a text form and/or a voice form. When the text format is output, the text format may also include a picture format or a video format. The information can be output to a display area corresponding to the control device, or output to a display area of a device of which the multi-group air conditioner has a communication link, for example, an internet communication link or a near field communication link, for example, a smart phone or a smart voice device, for example, a smart sound box having a display area, or the like.
Based on the foregoing embodiments, an embodiment of the present application provides a control method, and an implementation flow of the control method implemented by a control device is shown in fig. 6, which specifically includes the following steps:
and 41, the control equipment receives a control instruction for closing the electronic expansion valve of the indoor unit.
Wherein, a certain indoor unit is one or more indoor units in the multi-group pipe air conditioner.
And step 42, the control equipment controls the electronic expansion valve corresponding to the indoor unit to reversely close the step P on the basis of the current opening degree step P.
And 43, recording the current first temperature T1 of the evaporator of the indoor unit by the control equipment.
And 44, after the running time of the compressor is S minutes, the control device records the second temperature T1' of the evaporator of the indoor unit and the current indoor environment temperature T2.
And step 46, the control device determines the current electronic expansion valve opening adjusting value delta P-delta T2-mu 1/(S-F) according to the detection period S and the compressor operation frequency F and delta T1 after the compressor operation time S minutes.
Wherein, mu 1 is a preset coefficient.
And step 47, controlling the equipment to reversely close the electronic expansion valve by delta P.
And repeating the steps 43-48 in a circulating manner, realizing 3 periods of detection, and ensuring that the expansion valve is closed under the condition of avoiding jamming as much as possible.
Further, if the steps 43 to 48 are repeatedly and circularly executed, after the detection is carried out for 3 periods, if | T1' -T1| is still smaller than the preset value Δ T1 of the temperature rise of the evaporator, the electronic expansion valve is judged to be abnormal, and prompt information is output to prompt a user to report.
Based on the foregoing embodiments, an embodiment of the present application provides a multi-split air conditioner, and as shown in fig. 7, the multi-split air conditioner 5 includes an outdoor unit 51 and a plurality of indoor units 52, where each indoor unit 52 includes: the system comprises a temperature detection module 521, an electronic expansion valve opening degree judgment module 522 and a fault detection module 523, wherein each indoor unit system is provided with at least one electronic expansion valve 53 correspondingly to realize system refrigerant throttling.
When a certain indoor unit is not needed or has a closing requirement of the electronic expansion valve, the temperature detection module 521 and the opening degree judgment module 522 are used for judging the current closing state of the expansion valve, dynamically adjusting the opening degree value of the electronic expansion valve, and ensuring that the electronic expansion valve can be completely closed.
The temperature detecting module 521 is configured to record a temperature of an evaporator of one or more indoor units, an evaporator temperature after a specific time of operation, and an ambient temperature after a specific time of operation.
The electronic expansion valve opening degree determining module 522 is configured to determine whether the current internal expansion valve is in a fully closed state by determining a change amount before and after the evaporator temperature, a difference value between the evaporator temperature after the operation for the specific time and the ambient temperature after the operation for the specific time.
The electronic expansion valve opening degree determining module 522 is further configured to calculate an expansion valve adjustment opening degree value according to the amount of change of the evaporator before and after the temperature, the current compressor operating frequency, and the specific time, and adjust the expansion valve adjustment opening degree value according to the closing direction of the electronic expansion valve corresponding to the calculated expansion valve adjustment opening degree value.
The fault detection module 523 is configured to determine whether the current expansion valve is stuck or damaged according to the current expansion valve adjustment frequency and the expansion valve state.
The electronic expansion valve corresponding to each indoor unit can be positioned on the indoor side or the outdoor side.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
In the embodiment of the application, if the control device receives a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit, the control device determines the current opening degree of the electronic expansion valve, responds to the control instruction and controls the electronic expansion valve to adjust the current opening degree according to the closing direction of the electronic expansion valve, acquires the first evaporation temperature of the evaporator of the target indoor unit, starting a timer to time, stopping the timer when the timer is determined to be a preset time, stopping the timer, then collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit, and determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature and the first ambient temperature, determining a first target adjusting opening degree if the state of the electronic expansion valve is an incompletely closed state, and finally controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree. Therefore, when the electronic expansion valve corresponding to the target indoor unit needs to be closed, firstly, after the current opening degree of the electronic expansion valve is adjusted according to the closing direction according to the current opening degree of the electronic expansion valve, after the electronic expansion valve is closed for a period of time, the temperature change of the evaporator of the target indoor unit within a certain period of time and the temperature between the temperature of the evaporator and the ambient temperature are used for judging whether the electronic expansion valve is completely closed, when the electronic expansion valve is not completely closed, the first target adjustment opening degree is determined to continuously control the electronic expansion valve to adjust the first target adjustment opening degree according to the closing direction, the problem that the existing electronic expansion valve is single in closing adjustment mode is solved, the closing adjustment mode of the electronic expansion valve is enriched, the probability that the electronic expansion valve is not completely closed or blocked is effectively reduced, and the influence on the refrigerating or heating effect of an air-conditioning system is reduced. Furthermore, the fault detection of the electronic expansion valve is realized, the fault alarm of the electronic expansion valve can be timely provided, the operating efficiency of the air conditioning system is effectively improved, and the intelligent degree of the electronic expansion valve in the closing process is improved.
Based on the foregoing embodiments, embodiments of the present application provide a control device, and as shown in fig. 8, the control device 6 may include: a first determination unit 61, a first processing unit 62, a second processing unit 63, a second determination unit 64, a third determination unit 65, and a control unit 66; wherein:
the first determining unit 61 is configured to determine a current opening degree of the electronic expansion valve if a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit is received;
the first processing unit 62 is configured to, after controlling the electronic expansion valve to adjust the current opening degree according to the closing direction of the electronic expansion valve in response to the control instruction, acquire a first evaporation temperature of an evaporator of the target indoor unit, and start a timer to time;
the second processing unit 63 is configured to stop timing of the timer when the timing of the timer is determined to be the preset duration, and acquire a second evaporation temperature of the evaporator and a first environment temperature of an environment where the target indoor unit is currently located;
a second determination unit 64 for determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature;
a third determining unit 65 for determining the first target adjustment opening degree if the state of the electronic expansion valve is not completely closed;
and a control unit 66 for controlling the electronic expansion valve to adjust the first target adjustment opening degree in the closing direction based on the first target adjustment opening degree.
In other embodiments of the present application, the second determination unit 64 includes: a first determination module and a second determination module; wherein:
a first determining module for determining a first temperature difference between the first evaporation temperature and the second evaporation temperature;
the first determining module is further used for determining a second temperature difference value between the second evaporation temperature and the first environment temperature;
and the second determining module is used for determining the state of the electronic expansion valve based on the first temperature difference value and the second temperature difference value.
In other embodiments of the present application, the second determining module is specifically configured to implement the following steps:
if the absolute value of the first temperature difference is smaller than or equal to the preset evaporation temperature rise value and the absolute value of the second temperature difference is larger than or equal to the preset temperature threshold value, determining that the state of the electronic expansion valve is an incompletely closed state;
and if the first temperature difference value is greater than the preset evaporation temperature rise value and/or the absolute value of the second temperature difference value is less than the preset temperature threshold value, determining that the state of the electronic expansion valve is a closed state.
In other embodiments of the present application, the third determining unit 65 includes: a third determining module and a fourth determining module; wherein:
the third determining module is used for determining the current working parameters of the compressor corresponding to the target indoor unit if the state of the electronic expansion valve is not completely closed;
and the fourth determining module is used for determining the first target adjusting opening degree based on the current working parameter, the preset time length and the preset evaporating temperature rise value.
In other embodiments of the present application, the fourth determining module is specifically configured to implement the following steps:
determining a first product of a preset evaporation temperature rise value and a preset coefficient;
determining a second product of the current working frequency and the preset duration; wherein the current working parameter comprises a current working frequency;
and determining the ratio of the first product to the second product to obtain the first target adjusting opening degree.
In other embodiments of the present application, after the control unit 66 performs the step of adjusting the opening degree based on the first target adjustment opening degree, controlling the electronic expansion valve to adjust the first target adjustment opening degree in the closing direction:
the first processing unit 62 is further configured to collect a third evaporation temperature of the evaporator, and start a timer to time;
the second processing unit 63 is further configured to stop timing of the timer when the timing of the timer is the preset duration, and acquire a fourth evaporation temperature of the evaporator and a second ambient temperature of an environment where the target indoor unit is currently located;
a second determining unit 64, further configured to determine a state of the electronic expansion valve based on the third evaporation temperature, the fourth evaporation temperature, and the second ambient temperature;
the third determining unit 65 is further configured to end the adjusting operation if the state of the target electron expansion is the off state.
In other embodiments of the present application,
if the state of the electronic expansion valve is an incomplete closing state, determining a second target regulating opening degree;
a third determining unit 65, configured to control the electronic expansion valve to adjust the second target adjustment opening degree in the closing direction based on the second target adjustment opening degree;
the first processing unit 62 is further configured to collect a fourth evaporation temperature of the evaporator, and repeat this operation until the state of the electronic expansion valve is determined to be a closed state, or after the adjustment is repeated for a preset number of times, the adjustment operation is ended.
In other embodiments of the present application, referring to fig. 9, the control apparatus further includes: a third processing unit 67 and an output unit 68, wherein:
the first processing unit 62 is further configured to collect a fifth evaporation temperature of the evaporator, and start a timer to time;
the second processing unit 63 is further configured to stop the timer to count time when the timer counts the preset time duration, and acquire a sixth evaporation temperature of the evaporator;
a third processing unit 67, further configured to determine a third temperature difference between the sixth evaporation temperature and the fifth evaporation temperature;
and the output unit 68 is configured to output a prompt message for indicating that the electronic expansion valve is abnormal if the absolute value of the third temperature difference is less than or equal to the preset evaporation temperature rise value.
It should be noted that, in the embodiment, a specific implementation process of information interaction between the units and the modules may refer to implementation processes in the control methods provided in the embodiments corresponding to fig. 1 to 2 and fig. 4 to 6, and details are not described here.
In the embodiment of the application, if the control device receives a control instruction for instructing to close the electronic expansion valve corresponding to the target indoor unit, the control device determines the current opening degree of the electronic expansion valve, responds to the control instruction and controls the electronic expansion valve to adjust the current opening degree according to the closing direction of the electronic expansion valve, acquires the first evaporation temperature of the evaporator of the target indoor unit, starting a timer for timing, stopping the timer when the timer is determined to be a preset time, then collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit, and determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature and the first environment temperature, determining a first target adjusting opening degree if the state of the electronic expansion valve is in an incompletely closed state, and finally controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree. Therefore, when the electronic expansion valve corresponding to the target indoor unit needs to be closed, firstly, after the current opening degree of the electronic expansion valve is adjusted according to the closing direction according to the current opening degree of the electronic expansion valve, after the electronic expansion valve is closed for a period of time, the temperature change of the evaporator of the target indoor unit within a certain period of time and the temperature between the temperature of the evaporator and the ambient temperature are used for judging whether the electronic expansion valve is completely closed, when the electronic expansion valve is not completely closed, the first target adjustment opening degree is determined to continuously control the electronic expansion valve to adjust the first target adjustment opening degree according to the closing direction, the problem that the existing electronic expansion valve is single in closing adjustment mode is solved, the closing adjustment mode of the electronic expansion valve is enriched, the probability that the electronic expansion valve is not completely closed or blocked is effectively reduced, and the influence on the refrigerating or heating effect of an air-conditioning system is reduced. Furthermore, the fault detection of the electronic expansion valve is realized, the fault alarm of the electronic expansion valve can be timely provided, the operating efficiency of the air-conditioning system is effectively improved, and the intelligent degree of the electronic expansion valve in the closing process is improved.
Based on the foregoing embodiments, an embodiment of the present application provides a control apparatus, and as shown in fig. 10, the control apparatus 7 may include: a processor 71, a memory 72, and a communication bus 73, wherein:
a memory 72 for storing executable instructions;
a communication bus 73 for implementing a communication connection between the processor 71 and the memory 72;
the processor 71 is configured to execute the control program stored in the memory 72 to implement the implementation process in the control method provided in the embodiments corresponding to fig. 1 to 2 and fig. 4 to 6, which is not described herein again.
Based on the foregoing embodiments, embodiments of the present application provide a computer-readable storage medium, referred to as a storage medium for short, where one or more programs are stored in the computer-readable storage medium, and the one or more programs can be executed by one or more processors to implement the implementation processes of the control methods provided in the embodiments corresponding to fig. 1 to 2 and fig. 4 to 6, which are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (9)
1. A control method, characterized in that the method comprises:
if a control instruction for indicating to close the electronic expansion valve corresponding to the target indoor unit is received, determining the current opening degree of the electronic expansion valve;
after responding to the control instruction and controlling the electronic expansion valve to adjust the current opening according to the closing direction of the electronic expansion valve, acquiring a first evaporation temperature of an evaporator of the target indoor unit, and starting a timer to time;
when the timer is determined to be a preset time length, stopping timing of the timer, and collecting a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit;
determining a state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature;
if the state of the electronic expansion valve is not completely closed, determining the current working parameters of the compressor corresponding to the target indoor unit;
determining a first product of a preset evaporation temperature rise value and a preset coefficient; determining a second product of the current working frequency and the preset duration; wherein the current operating parameter comprises the current operating frequency; determining the ratio of the first product to the second product to obtain a first target adjusting opening degree;
and controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
2. The method of claim 1, wherein determining the state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature comprises:
determining a first temperature difference between the first evaporation temperature and the second evaporation temperature;
determining a second temperature difference between the second evaporation temperature and the first ambient temperature;
determining a state of the electronic expansion valve based on the first temperature difference and the second temperature difference.
3. The method of claim 2, wherein determining the state of the electronic expansion valve based on the first temperature difference and the second temperature difference comprises:
if the absolute value of the first temperature difference is smaller than or equal to a preset evaporation temperature rise value and the absolute value of the second temperature difference is larger than or equal to a preset temperature threshold value, determining that the state of the electronic expansion valve is an incompletely closed state;
and if the first temperature difference is greater than the preset evaporation temperature rise value and/or the absolute value of the second temperature difference is less than the preset temperature threshold value, determining that the state of the electronic expansion valve is a closed state.
4. The method according to any one of claims 1 to 3, wherein after the controlling the electronic expansion valve in the closing direction to adjust the first target adjustment opening degree based on the first target adjustment opening degree, the method further comprises:
collecting a third evaporation temperature of the evaporator, and starting the timer to time;
when the timer is determined to be timed to be the preset time length, stopping timing of the timer, and collecting a fourth evaporation temperature of the evaporator and a second environment temperature of the current environment of the target indoor unit;
determining a state of the electronic expansion valve based on the third evaporation temperature, the fourth evaporation temperature, and the second ambient temperature;
and if the target electron expansion state is the closing state, ending the adjustment operation.
5. The method of claim 4, further comprising:
if the state of the electronic expansion valve is not completely closed, determining a second target regulating opening degree;
controlling the electronic expansion valve to adjust the second target adjustment opening degree according to the closing direction based on the second target adjustment opening degree;
and collecting a fourth evaporation temperature of the evaporator, repeating the operation until the state of the electronic expansion valve is determined to be a closed state, or repeating the adjustment for a preset number of times, and finishing the adjustment operation.
6. The method of claim 5, wherein after repeatedly adjusting for a preset number of times, the method further comprises:
collecting a fifth evaporation temperature of the evaporator, and starting a timer to time;
when the timer is determined to be a preset time length, stopping timing of the timer, and collecting a sixth evaporation temperature of the evaporator;
determining a third temperature difference between the sixth evaporation temperature and the fifth evaporation temperature;
and if the absolute value of the third temperature difference is less than or equal to the preset evaporation temperature rise value, outputting prompt information for indicating that the electronic expansion valve is abnormal.
7. A control device, characterized in that the device comprises: the device comprises a first determination unit, a first processing unit, a second determination unit, a third determination unit and a control unit; wherein:
the first determining unit is used for determining the current opening degree of the electronic expansion valve if a control instruction for indicating to close the electronic expansion valve corresponding to the target indoor unit is received;
the first processing unit is used for responding to the control instruction, controlling the electronic expansion valve according to the closing direction of the electronic expansion valve to adjust the current opening, collecting the first evaporation temperature of the evaporator of the target indoor unit, and starting a timer to time;
the second processing unit is used for stopping the timing of the timer when the timing of the timer is determined to be a preset time length, and acquiring a second evaporation temperature of the evaporator and a first environment temperature of the current environment of the target indoor unit;
the second determining unit is configured to determine a state of the electronic expansion valve based on the first evaporation temperature, the second evaporation temperature, and the first ambient temperature;
the third determining unit is configured to determine a current working parameter of the compressor corresponding to the target indoor unit if the state of the electronic expansion valve is an incompletely closed state; determining a first product of a preset evaporation temperature rise value and a preset coefficient; determining a second product of the current working frequency and the preset duration; wherein the current operating parameter comprises the current operating frequency; determining the ratio of the first product to the second product to obtain a first target adjusting opening degree;
and the control unit is used for controlling the electronic expansion valve to adjust the first target adjusting opening degree according to the closing direction based on the first target adjusting opening degree.
8. A control apparatus, characterized in that the control apparatus comprises: a memory, a communication bus, and a processor; wherein:
the memory to store executable instructions;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor, configured to execute the control program stored in the memory, implementing the steps of the control method according to any one of claims 1 to 6.
9. A storage medium, characterized in that the storage medium has stored thereon a control program which, when executed by a processor, implements the steps of the control method according to any one of claims 1 to 6.
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