CN115264770A - Air conditioner control method and device, air conditioner and computer readable storage medium - Google Patents

Air conditioner control method and device, air conditioner and computer readable storage medium Download PDF

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Publication number
CN115264770A
CN115264770A CN202210818883.1A CN202210818883A CN115264770A CN 115264770 A CN115264770 A CN 115264770A CN 202210818883 A CN202210818883 A CN 202210818883A CN 115264770 A CN115264770 A CN 115264770A
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China
Prior art keywords
air conditioner
expansion valve
electronic expansion
opening
correction value
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Granted
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CN202210818883.1A
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CN115264770B (en
Inventor
张晶晶
朱合华
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses an air conditioner control method, an air conditioner control device, an air conditioner and a computer readable storage medium, wherein the method comprises the following steps: detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick connector of the air conditioner; when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve; and correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve. By applying the air conditioner control method to the air conditioner, the system pressure loss caused by the quick connector can be compensated, so that the air conditioner can keep a good refrigeration effect during refrigeration, the occurrence of frosting of the air conditioner can be reduced during heating, and the comfort level experience of a user during air conditioner use is enhanced.

Description

Air conditioner control method and device, air conditioner and computer readable storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioner control method and apparatus, an air conditioner, and a computer-readable storage medium.
Background
The split air conditioner is an air conditioner which is composed of an indoor unit and an outdoor unit, is respectively installed indoors and outdoors, and is connected with the middle of the indoor unit through a pipeline and an electric wire.
Because some indoor units and outdoor units are far away from each other, long pipes are needed for connection of the indoor units and the outdoor units, but the manufacturability of the pipes and the current situation of operability of connection of the indoor units and the outdoor units are influenced at the present stage, the indoor units and the outdoor units are communicated with each other, the pipes are lengthened in a way of butting multiple groups of pipes, and the joints among the pipes in all groups have throttling effects, so that the pressure loss of the whole air-conditioning system is large in the process of starting and running of an air conditioner, the situations that the air conditioner is poor in refrigeration effect, heating is prone to frosting occur frequently, and the comfort experience of users is greatly influenced.
Disclosure of Invention
The invention mainly aims to provide an air conditioner control method, an air conditioner control device, an air conditioner and a computer readable storage medium, and aims to solve the technical problem that the air conditioning effect of the existing split type air conditioner is not ideal.
In order to achieve the above object, the present invention provides an air conditioner control method, including the steps of:
detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick connector of the air conditioner;
when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
and correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve.
Optionally, the step of obtaining an opening correction value of the electronic expansion valve includes:
acquiring a difference value between the ambient temperature and the temperature of the heat exchanger;
and determining the opening correction value of the electronic expansion valve according to the target interval in which the difference value is positioned.
Optionally, when the current operation mode of the air conditioner is a cooling mode, the ambient temperature includes an indoor ambient temperature, and the heat exchanger temperature includes an indoor heat exchanger temperature;
or when the current operation mode of the air conditioner is a heating mode, the environment temperature comprises the outdoor environment temperature, and the heat exchanger temperature comprises the outdoor heat exchanger temperature.
Optionally, the step of correcting the opening degree of the electronic expansion valve according to the opening degree correction value includes:
acquiring a target exhaust temperature and a real-time exhaust temperature of the electronic expansion valve;
determining a target opening degree of the electronic expansion valve according to a difference value between the target exhaust temperature and the real-time exhaust temperature;
and correcting the target opening by using the opening correction value.
Optionally, the step of correcting the opening degree of the electronic expansion valve according to the opening degree correction value so that the air conditioner operates according to the corrected opening degree of the electronic expansion valve includes:
correcting the initial opening of the electronic expansion valve according to the opening correction value so that the air conditioner runs for a preset time according to the corrected initial opening of the electronic expansion valve;
wherein the opening degree of the electronic expansion valve is the initial opening degree.
Optionally, the method further comprises:
acquiring the initial refrigerant pressure and the tail refrigerant pressure of the refrigerant tubing;
and when the pressure difference between the pressure of the start-end refrigerant and the pressure of the tail-end refrigerant is greater than or equal to a preset pressure threshold value, executing the step of correcting the initial opening of the electronic expansion valve according to the opening correction value.
Optionally, the step of obtaining an opening correction value of the electronic expansion valve when the preset signal is detected includes:
when the preset signal is detected, determining a target indoor unit corresponding to the preset signal;
and acquiring an opening correction value of the electronic expansion valve of the target indoor unit.
Further, to achieve the above object, the present invention also provides an air conditioner control device including:
the working condition detection module is used for detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick coupling of the air conditioner; when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
and the working condition adjusting module is used for correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve.
In addition, in order to achieve the above object, the present invention further provides an air conditioner, including a processor, a memory, and an air conditioner control program stored in the memory and executable by the processor, wherein when the air conditioner control program is executed by the processor, the steps of the air conditioner control method as described above are implemented.
The present invention also provides a computer readable storage medium having an air conditioner control program stored thereon, wherein the air conditioner control program, when executed by a processor, implements the steps of the air conditioner control method as described above.
According to the air conditioner control method in the technical scheme, through the step of detecting the preset signal on the air conditioner, namely through identifying whether the air conditioner is provided with the quick connector between the refrigerant distribution pipes of the air conditioner, the throttling effect of the quick connector is considered, and the abnormal system pressure loss of the air conditioner can be accurately and efficiently determined; through the step of obtaining the opening correction value of the electronic expansion valve when the preset signal is detected, the opening of the electronic expansion valve can be corrected accurately in real time to compensate the system pressure loss caused by the quick connector under the condition that the quick connector is installed between the refrigerant distribution pipes of the air conditioner and the pressure loss exists; and finally, correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve, and compensating the system pressure loss caused by the quick connector according to the opening of the electronic expansion valve, so that the air conditioner can ensure that the internal pressure of the system is within an expected normal range in the operation process, the refrigeration effect of the air conditioner during refrigeration is further ensured, the occurrence of frosting during heating is reduced, and the comfort experience of a user when the air conditioner is used indoors is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a hardware operating environment of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 3 is a detailed flowchart of step S30 of the air conditioner control method according to the present invention;
FIG. 4 is a flowchart illustrating a second embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 5 is a flow chart illustrating a third embodiment of a method for controlling an air conditioner in accordance with the present invention;
FIG. 6 is another schematic flow chart of a third embodiment of a method for controlling an air conditioner in accordance with the present invention;
FIG. 7 is a schematic view of an application scenario of the air conditioner control method according to the present invention;
fig. 8 is a schematic view illustrating a connection structure between an indoor unit and an outdoor unit according to a control method of an air conditioner of the present invention;
FIG. 9 is a schematic diagram of a dial switch set according to the control method of the air conditioner of the present invention;
fig. 10 is a schematic diagram of a frame structure of an air conditioner control device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical scheme of the invention is summarized as follows:
referring to fig. 9, a dial switch set may be disposed on an outdoor unit of the air conditioner, and the dial switch set includes a plurality of dial switches, each of which corresponds to one indoor unit of the air conditioner. Considering that if one indoor unit is far away from the outdoor unit, the number of refrigerant pipes needed to connect the indoor unit and the outdoor unit is large, one or more quick connectors (quick lengthening connectors) need to be arranged between the refrigerant pipes, and in order to compensate for the system pressure loss caused by the quick connectors, the corresponding dial switch can be turned on, so that the air conditioner detects a signal that the quick connectors are installed, the opening degree of an electronic expansion valve of the air conditioner is corrected in real time based on the original standard opening degree, and the air conditioner runs with the corrected opening degree of the electronic expansion valve, thereby overcoming the prior technical defect that the system pressure loss is caused by having to adopt the quick connectors between the indoor unit and the outdoor unit due to the distance.
The embodiment of the invention provides an air conditioner. The air conditioner may be any type of split air conditioner, such as a wall-mounted air conditioner, a cabinet air conditioner, a mobile air conditioner, a window air conditioner, a multi-split air conditioner, and a ceiling air conditioner, which is not limited herein.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hardware operating environment of an air conditioner according to an embodiment of the present invention.
As shown in fig. 1, the air conditioner may include: a processor 1001, e.g. a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a Display (Display), an input unit such as a control panel, and the optional user interface 1003 may also comprise a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WIFI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001. An air conditioner control program may be included in the memory 1005 as a kind of computer storage medium.
Those skilled in the art will appreciate that the hardware configuration shown in fig. 1 does not constitute a limitation of the apparatus, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
With continued reference to fig. 1, the memory 1005 of fig. 1, which is one type of computer-readable storage medium, may include an operating system, a user interface module, a network communication module, and an air conditioner control program.
In fig. 1, the network communication module is mainly used for connecting a server and performing data communication with the server; and the processor 1001 may call the air conditioner control program stored in the memory 1005 and perform the steps in the following respective embodiments.
Based on the hardware structure of the controller, various embodiments of the air conditioner control method are provided.
The embodiment of the invention provides an air conditioner control method.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a control method of an air conditioner according to a first embodiment of the present invention; in a first embodiment of the present invention, an air conditioner control method includes the steps of:
step S10, detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick coupling of the air conditioner;
in this embodiment, the air conditioner includes at least an indoor unit and an outdoor unit, and refrigerant piping, lines, and other devices for connecting the indoor unit and the outdoor unit together. The air conditioner can be a single air conditioner (a single indoor unit is connected with a single outdoor unit) or a multi-air conditioner (a single outdoor unit is connected with a plurality of indoor units at the same time).
To facilitate understanding of the connection manner of the indoor unit and the outdoor unit through the refrigerant pipe in this embodiment, reference may be made to fig. 8, where in fig. 8, two indoor units and one outdoor unit are included, the indoor units and the outdoor units are connected through the refrigerant pipe, and a plurality of quick connectors including indoor/outdoor quick connectors and a plurality of quick lengthening connectors are further included between the indoor units and the outdoor units, where the quick lengthening connectors in the quick connectors are used to connect adjacent refrigerant pipes.
The outdoor unit of the air conditioner can be provided with a dial switch group, and if the air conditioner is a single unit, one dial switch can be arranged in the dial switch group. If the air conditioner is a multi-split air conditioner, a plurality of dial switches can be arranged in the dial switch group, and each dial switch corresponds to a specific indoor unit.
As shown in fig. 9, the dial switch group in fig. 9 includes four dial switches with codes 1, 2, 3, and 4, and may correspond to indoor units with codes 1, 2, 3, and 4, respectively. The dial switch group can be opened by the opening or closing function of the corresponding dial switch, so that a preset signal is generated, the air conditioner can detect a signal that a quick connector between a target indoor unit and an outdoor unit corresponding to the dial switch is installed, the opening of an electronic expansion valve corresponding to the target indoor unit is corrected, and the system pressure loss of the air conditioner caused by the throttling effect of the quick connector is compensated.
In addition, when the dial switch is closed, a preset signal cannot be generated, and the opening degree of the electronic expansion valve is kept at the original normal standard opening degree.
Step S20, when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
if the preset signal is detected, it is indicated that a quick connector exists between the indoor unit and the outdoor unit corresponding to the preset signal, then a table lookup can be further used to obtain an opening correction value of the electronic expansion valve corresponding to the indoor unit, and the opening correction value is used for correcting the opening of the electronic expansion valve in real time.
In one embodiment, the step S20 includes:
step a, when the preset signal is detected, determining a target indoor unit corresponding to the preset signal;
and b, acquiring an opening correction value of the electronic expansion valve of the target indoor unit.
When an installed signal of a quick connector of an air conditioner is detected, it is required to determine which indoor unit and outdoor unit the quick connector is installed between, because the multi-split air conditioner is that a plurality of indoor units are connected with a single outdoor unit, that is, it is required to determine a target indoor unit corresponding to the installed signal among the plurality of indoor units, only the opening degree of an electronic expansion valve of the target indoor unit is corrected, where the target indoor unit may be one or more, for example, the dial switches of code 1 and code 3 are in an open state, and the dial switches of code 2 and code 4 are in a closed state, the opening degrees of the electronic expansion valves of the target indoor units of code 1 and code 3 may be corrected at the same time, and the opening degree correction values of the electronic expansion valves of each target indoor unit may be the same or different, but are generally different.
According to the embodiment, the target indoor unit provided with the quick connectors is accurately determined, then only the electronic expansion valve of the target indoor unit is corrected, and the electronic expansion valves of other indoor units keep normal standard opening degrees, so that the air-conditioning system comprising a plurality of indoor units and a single outdoor unit can respectively and orderly control each electronic expansion valve, and the indoor space where each indoor unit is located can keep a good comfortable environment.
And step S30, correcting the opening of the electronic expansion valve according to the opening correction value so as to enable the air conditioner to operate according to the corrected opening of the electronic expansion valve.
After the opening correction value of the electronic expansion valve of the target indoor unit is obtained, the real-time target opening of the electronic expansion valve is obtained through calculation according to a preset calculation rule, the corrected opening of the electronic expansion valve is obtained by adding the opening correction value to the target opening, and the controller in the air conditioner controls the electronic expansion valve to operate at the corrected opening.
Optionally, referring to fig. 3, in an embodiment, the step S30 is to correct the opening degree of the electronic expansion valve after the air conditioner operates stably, and optionally, the correcting the opening degree of the electronic expansion valve according to the opening degree correction value includes:
step S31, acquiring a target exhaust temperature and a real-time exhaust temperature of the electronic expansion valve;
step S32, determining a target opening degree of the electronic expansion valve according to a difference value between the target exhaust temperature and the real-time exhaust temperature;
and step S33, correcting the target opening by using the opening correction value.
In this embodiment, the real-time exhaust temperature of the electronic expansion valve may be directly detected by the temperature sensor, the target exhaust temperature of the electronic expansion valve may be obtained by looking up a table according to a difference between a temperature set by a user and an actual indoor temperature, calculating a difference between the target exhaust temperature and the real-time exhaust temperature, and obtaining an adjustment step number of the electronic expansion valve, that is, a target opening degree of the electronic expansion valve according to the table look-up of the difference. And directly adding the obtained opening correction value to the target opening to obtain the real-time opening of the corrected electronic expansion valve.
According to the air conditioner control method in the technical scheme, through the step of detecting the preset signal on the air conditioner, namely through identifying whether the air conditioner is provided with the quick connector between the refrigerant distribution pipes of the air conditioner, the throttling effect of the quick connector is considered, and the abnormal system pressure loss of the air conditioner can be accurately and efficiently determined; through the step of obtaining the opening correction value of the electronic expansion valve when the preset signal is detected, the opening of the electronic expansion valve can be corrected accurately in real time to compensate the system pressure loss caused by the quick connector under the condition that the quick connector is installed between the refrigerant distribution pipes of the air conditioner and the pressure loss exists; and finally, correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve, and compensating the system pressure loss caused by the quick connector according to the opening of the electronic expansion valve, so that the air conditioner can ensure that the internal pressure of the system is within an expected normal range in the operation process, the refrigeration effect of the air conditioner during refrigeration is further ensured, the occurrence of frosting during heating is reduced, and the comfort experience of a user when the air conditioner is used indoors is enhanced.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a control method of an air conditioner according to a second embodiment of the present invention; further, a second embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, the step S20 includes:
s21, acquiring a difference value between the ambient temperature and the temperature of the heat exchanger;
and S22, determining the opening correction value of the electronic expansion valve according to the target interval of the difference value.
Specifically, in an embodiment, when the current operation mode of the air conditioner is the cooling mode, the ambient temperature includes an indoor ambient temperature, and the heat exchanger temperature includes an indoor heat exchanger temperature.
A first difference value T1-T2 between the indoor environment temperature T1 and the indoor heat exchanger temperature T2 is obtained, a target interval where the first difference value T1-T2 is located can be determined according to the following table 1, and then the opening correction value delta Pn of the electronic expansion valve is determined through the target interval.
T1-T2 0～3 3～6 6～10 10～15 15～
△Pn △Pnc1 △Pnc2 △Pnc3 △Pnc4 △Pnc5
TABLE 1
As shown in table 1, when the first difference T1-T2 is in the target interval (0, 3), the corresponding opening degree correction value is Δ Pnc1, when the first difference T1-T2 is in the target interval (3, 6), the corresponding opening degree correction value is Δ Pnc2, when the first difference T1-T2 is in the target interval (6, 10), the corresponding opening degree correction value is Δ Pnc3, when the first difference T1-T2 is in the target interval (10, 15), the corresponding opening degree correction value is Δ Pnc4, when the first difference T1-T2 is in the target interval (15, ∞), the corresponding opening degree correction value is Δ Pnc5, and it should be noted that the larger the first difference T1-T2, the smaller the opening degree correction value Δ Pn is, that is Δ Pnc1 > [ Pn 2 ] > [ Δ Pnc3 > [ Δ > [ Pnc4 ].
Note that, the technical principle that the larger the first difference T1-T2 is in the cooling mode, the smaller the opening correction value Δ Pn is: the smaller the opening degree of the electronic expansion valve is, the more obvious the throttling function is, the lower the temperature and the pressure of the low-temperature and low-pressure refrigerant liquid flowing through an evaporator (heat exchanger) of the indoor unit through the electronic expansion valve is, and under the condition that the difference between the indoor temperature and the temperature of the indoor heat exchanger is larger, the temperature and the pressure of the refrigerant are reduced, so that the aim of quickly refrigerating the indoor environment is fulfilled, and the comfort level of a user is improved.
In another embodiment, when the current operation mode of the air conditioner is a heating mode, the ambient temperature includes an outdoor ambient temperature, and the heat exchanger temperature includes an outdoor heat exchanger temperature.
And acquiring a second difference value T4-T3 between the outdoor environment temperature T3 and the outdoor heat exchanger temperature T4, determining a target interval where the second difference value is located according to the following table 2, and determining the opening correction value delta Pn of the electronic expansion valve according to the target interval.
T4-T3 0～3 3～6 6～10 10～15 15～
△Pn △Pnh1 △Pnh2 △Pnh3 △Pnh4 △Pnh5
TABLE 2
As shown in table 2, when the second difference T4-T3 is in the target interval (0, 3), the corresponding opening degree correction value is Δ Pnh1, when the second difference T4-T3 is in the target interval (3, 6), the corresponding opening degree correction value is Δ Pnh2, when the second difference T4-T3 is in the target interval (6, 10), the corresponding opening degree correction value is Δ Pnh3, when the second difference T4-T3 is in the target interval (10, 15), the corresponding opening degree correction value is Δ Pnh4, when the second difference T4-T3 is in the target interval (15, ∞), the corresponding opening degree correction value is Δ Pnh5, and it should be noted that the larger the second difference T4-T3, the larger the opening degree correction value Δ Pn is, that Δ Pnh1 < pnh2 Δ < pnh3 Δ < pnh4 Pn 4 Pn 5.
It should be noted that the technical principle that the larger the second difference T4-T3 in the heating mode, the larger the opening correction value Δ Pn is that: the larger the opening of the electronic expansion valve is, the smaller the throttling function is, the higher the temperature and pressure of the low-temperature and low-pressure refrigerant liquid flowing through an evaporator (heat exchanger) in the outdoor unit through the electronic expansion valve is, and under the condition that the difference between the outdoor temperature and the temperature of the outdoor heat exchanger is larger, the refrigerant is very easy to frost, the condition that the temperature and the pressure of the refrigerant are improved can be achieved, the frost of the outdoor unit can be reduced or avoided, and the uncomfortable indoor environment caused by the frost of the outdoor unit is prevented from being brought to users.
Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of an air conditioner according to a third embodiment of the present invention. The present embodiment is based on all the embodiments described above. Optionally, in this embodiment, the step S30 may further correct an initial opening degree of the electronic expansion valve after the air conditioner is turned on, and as in the step S30, the method includes:
step S300, correcting the initial opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates for a preset time according to the corrected initial opening of the electronic expansion valve;
wherein the opening degree of the electronic expansion valve is the initial opening degree.
In this embodiment, the initial opening degree may be pre-stored in the memory of the air conditioner according to actual needs, and when the air conditioner is turned on, the initial opening degree of the electronic expansion valve may be directly obtained, and an initial opening degree correction value corresponding to the initial opening degree may be determined, where the initial opening degree correction value may refer to the opening degree correction value Δ Pn in tables 1 and 2, and may range to (0,400) steps. And adding the initial opening degree to the initial opening degree correction value to obtain the corrected initial opening degree of the electronic expansion valve, and operating the air conditioner according to the corrected initial opening degree of the electronic expansion valve until the operation time reaches a preset time threshold, wherein the preset time threshold can be set according to actual needs, such as 30s, 1 min, 2 min and the like.
Optionally, after the air conditioner operates according to the corrected initial opening of the electronic expansion valve until the operation time reaches a preset time threshold, the air conditioner operates stably, and the electronic expansion valve of the indoor unit is adjusted to a real-time target opening. In some embodiments, after the air conditioner is operated stably, the electronic expansion valve of the indoor unit may further correct the target opening degree operation based on the opening degree correction value according to the embodiment of fig. 3.
The air conditioner is enabled to operate for a certain time period after being just opened and corrected by the initial opening degree of the electronic expansion valve, so that the operation of the air conditioner and the stability of system pressure can be ensured, and the air conditioner is prevented from being damaged when the air conditioner is opened.
In an embodiment, referring to fig. 6, the method further includes:
step S100, acquiring the initial end refrigerant pressure and the tail end refrigerant pressure of the refrigerant tubing;
and step S200, when the pressure difference between the initial end refrigerant pressure and the tail end refrigerant pressure is greater than or equal to a preset pressure threshold value, executing the step of correcting the initial opening of the electronic expansion valve according to the opening correction value.
In this embodiment, if the indoor unit and the outdoor unit are connected by only a single refrigerant pipe, the starting refrigerant pressure and the end refrigerant pressure of the refrigerant pipe are generally determined according to the temperature set by the user and the air conditioning mode when the air conditioner is just turned on, and correspondingly, the pressure range in which the pressure difference between the starting refrigerant pressure and the end refrigerant pressure is located is also determined and stored in the controller of the air conditioner, but if the indoor unit and the outdoor unit are connected together by a plurality of refrigerant pipes, a quick extension connector as shown in fig. 8 needs to be installed between the plurality of refrigerant pipes, so that the starting refrigerant pressure and the end refrigerant pressure of the entire refrigerant in which the plurality of refrigerant pipes are combined cannot be determined without detection, the starting refrigerant pressure and the end refrigerant pressure of the entire refrigerant pipe need to be obtained, the pressure difference (absolute value) between the starting refrigerant pressure and the end refrigerant pressure is calculated, and whether the pressure difference (absolute value) between the starting refrigerant pressure and the end refrigerant pressure is greater than or equal to a preset pressure threshold value is determined, where the pressure threshold value in the pressure range is the maximum value, and the pressure of the storage device can be set in advance according to the actual storage mode that the storage device needs to determine, where: the method comprises the steps of obtaining the current user set temperature and the indoor environment temperature, and determining a corresponding preset pressure threshold according to the difference value between the user set temperature and the indoor environment temperature. If the pressure difference between the initial-end refrigerant pressure and the tail-end refrigerant pressure is greater than the preset pressure threshold, it indicates that the system pressure loss is large when the air conditioner is just started, and the initial opening of the electronic expansion valve needs to be corrected in time to keep the stability of the operation of the air conditioner and ensure the efficiency and the effect of air conditioning of the air conditioner. It should be noted that the initial opening correction value of the electronic expansion valve may also be determined by a pressure difference between a starting refrigerant pressure and a tail refrigerant pressure of the entire refrigerant pipe, and the larger the pressure difference is, the larger the initial opening correction value is.
Through the third embodiment of the invention, when the air conditioner is just started, the air conditioner can keep stable operation, and the system pressure loss caused by the quick connector is compensated, so that the air conditioner can more efficiently adjust the indoor air environment to reach the temperature expected by a user, and the comfort experience of the user is better.
For further understanding of the present invention and the above embodiments, please refer to fig. 7, and fig. 7 is a schematic view illustrating an application scenario of the air conditioner control method according to the present invention.
The air conditioner control method disclosed by the invention is applied to a specific scene and can be carried out according to the following flow sequence:
1. an air conditioner outdoor unit is designed with a dial switch in an electric control manner, as shown in fig. 9, wherein 1 to 4 correspond to 1 to 4 indoor units (including but not limited to 4 indoor units) respectively;
2. when a certain indoor unit needs a long pipe (the whole refrigerant pipe formed by connecting and combining a plurality of refrigerant pipes), for example, the number 1 indoor unit and the outdoor unit are connected with the long pipe, when the indoor unit is installed, an engineer can turn ON the corresponding number 1 dial switch, and the default of factory setting can be OFF;
3. the method comprises the following steps that (1) an air conditioner is powered on, a compressor is started, an electronic expansion valve executes initialization action, and meanwhile, the condition of a dial switch of the long-length tubing is detected (a preset signal is detected);
4. air conditioner controller calculates initial opening Pin of electronic expansion valve
Pin＝P0+△P
Wherein P0 is an initial opening degree executed when the dial switch is OFF, and Δ P is an initial opening degree correction amount (value) when the dial switch is ON, may be provided in the controller;
5. starting the air conditioner to operate, and operating an electronic expansion valve within a preset time t to operate an initial opening Pin;
6. after the time t, the air conditioner controller calculates and operates the real-time operation opening degree (opening degree of the voltage expansion valve) Pn of the electronic expansion valve
Pn＝Pn0+△Pn
Pn0 is the real-time opening degree of the electronic expansion valve calculated by the controller according to a preset method when the dial switch is OFF; real-time correction when the delta Pn dial switch is ON.
Wherein, the delta Pn is related to the real-time indoor environment temperature T1 and the real-time indoor heat exchanger temperature T2 of the air conditioner during refrigeration, and is related to the outdoor heat exchanger temperature T3 and the real-time outdoor environment temperature T4 during heating, and specific values are shown in the table 1 and the table 2 mentioned above.
In addition, referring to fig. 10, fig. 10 is a schematic diagram of a frame structure of the air conditioner control device according to the present invention; the present invention also provides an air conditioner control device, including:
the working condition detection module A10 is used for detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick coupling of the air conditioner; when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
and the working condition adjusting module A20 is used for correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve.
Optionally, the operating condition detecting module a10 is further configured to:
acquiring a difference value between the ambient temperature and the temperature of the heat exchanger;
and determining the opening correction value of the electronic expansion valve according to the target interval in which the difference value is positioned.
Optionally, the operating condition detecting module a10 is further configured to:
when the current operation mode of the air conditioner is a refrigeration mode, the environment temperature comprises an indoor environment temperature, and the heat exchanger temperature comprises an indoor heat exchanger temperature;
or when the current operation mode of the air conditioner is a heating mode, the environment temperature comprises the outdoor environment temperature, and the heat exchanger temperature comprises the outdoor heat exchanger temperature.
Optionally, the operating condition adjusting module a20 is further configured to:
acquiring a target exhaust temperature and a real-time exhaust temperature of the electronic expansion valve;
determining a target opening degree of the electronic expansion valve according to a difference value between the target exhaust temperature and the real-time exhaust temperature;
and correcting the target opening by using the opening correction value.
Optionally, the operating condition adjusting module a20 is further configured to:
correcting the initial opening of the electronic expansion valve according to the opening correction value so that the air conditioner runs for a preset time according to the corrected initial opening of the electronic expansion valve;
wherein the opening degree of the electronic expansion valve is the initial opening degree.
Optionally, the operating condition detecting module a10 is further configured to:
acquiring the initial refrigerant pressure and the tail refrigerant pressure of the refrigerant tubing;
and when the pressure difference between the initial refrigerant pressure and the tail refrigerant pressure is greater than or equal to a preset pressure threshold value, executing the step of correcting the initial opening of the electronic expansion valve according to the opening correction value.
Optionally, the operating condition detecting module a10 is further configured to:
when the preset signal is detected, determining a target indoor unit corresponding to the preset signal;
and acquiring an opening correction value of the electronic expansion valve of the target indoor unit.
The specific implementation of the air conditioner control device of the present invention is substantially the same as the embodiments of the air conditioner control method described above, and will not be described herein again.
In addition, the invention also provides a computer readable storage medium. The computer readable storage medium of the present invention stores an air conditioner control program, wherein the air conditioner control program, when executed by a processor, implements the steps of the air conditioner control method as described above.
The method for implementing the air conditioner control program when executed may refer to various embodiments of the air conditioner control method of the present invention, and will not be described herein again.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. An air conditioner control method, characterized by comprising the steps of:
detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick connector of the air conditioner;
when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
and correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve.
2. The air conditioner controlling method according to claim 1, wherein the step of obtaining the opening correction value of the electronic expansion valve includes:
acquiring a difference value between the ambient temperature and the temperature of the heat exchanger;
and determining the opening correction value of the electronic expansion valve according to the target interval of the difference value.
3. The air conditioner control method as claimed in claim 2, wherein when the current operation mode of the air conditioner is a cooling mode, the ambient temperature includes an indoor ambient temperature, and the heat exchanger temperature includes an indoor heat exchanger temperature;
or when the current operation mode of the air conditioner is a heating mode, the environment temperature comprises the outdoor environment temperature, and the heat exchanger temperature comprises the outdoor heat exchanger temperature.
4. The air conditioner control method according to claim 1, wherein the step of correcting the opening degree of the electronic expansion valve based on the opening degree correction value includes:
acquiring a target exhaust temperature and a real-time exhaust temperature of the electronic expansion valve;
determining a target opening degree of the electronic expansion valve according to a difference value between the target exhaust temperature and the real-time exhaust temperature;
and correcting the target opening by using the opening correction value.
5. The air conditioner control method according to claim 1, wherein the step of correcting the opening degree of the electronic expansion valve based on the opening degree correction value so that the air conditioner operates in accordance with the corrected opening degree of the electronic expansion valve comprises:
correcting the initial opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates for a preset time according to the corrected initial opening of the electronic expansion valve;
wherein the opening degree of the electronic expansion valve is the initial opening degree.
6. The air conditioner control method as claimed in claim 5, wherein the method further comprises:
acquiring the initial end refrigerant pressure and the tail end refrigerant pressure of the refrigerant tubing;
and when the pressure difference between the initial refrigerant pressure and the tail refrigerant pressure is greater than or equal to a preset pressure threshold value, executing the step of correcting the initial opening of the electronic expansion valve according to the opening correction value.
7. The air conditioner control method according to claim 1, wherein the step of obtaining the opening correction value of the electronic expansion valve upon detection of the preset signal comprises:
when the preset signal is detected, determining a target indoor unit corresponding to the preset signal;
and acquiring an opening correction value of the electronic expansion valve of the target indoor unit.
8. An air conditioner control device characterized by comprising:
the working condition detection module is used for detecting a preset signal on the air conditioner, wherein the preset signal represents an installed signal of a quick coupling of the air conditioner; when the preset signal is detected, acquiring an opening correction value of the electronic expansion valve;
and the working condition adjusting module is used for correcting the opening of the electronic expansion valve according to the opening correction value so that the air conditioner operates according to the corrected opening of the electronic expansion valve.
9. An air conditioner comprising a processor, a memory, and an air conditioner control program stored on the memory and executable by the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that an air conditioner control program is stored thereon, wherein the air conditioner control program, when executed by a processor, implements the steps of the air conditioner control method according to any one of claims 1 to 7.
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CN115789908A (en) * 2022-11-15 2023-03-14 宁波奥克斯电气股份有限公司 Expansion valve opening degree control method and device of air conditioner and multi-connected air conditioner

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CN108019892A (en) * 2017-11-23 2018-05-11 青岛海尔空调电子有限公司 The control method of multi-connected air conditioning system

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Publication number Priority date Publication date Assignee Title
CN108019892A (en) * 2017-11-23 2018-05-11 青岛海尔空调电子有限公司 The control method of multi-connected air conditioning system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115789908A (en) * 2022-11-15 2023-03-14 宁波奥克斯电气股份有限公司 Expansion valve opening degree control method and device of air conditioner and multi-connected air conditioner

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