CN114576798A - Multi-split air conditioning system and control method thereof - Google Patents
Multi-split air conditioning system and control method thereof Download PDFInfo
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- CN114576798A CN114576798A CN202210319580.5A CN202210319580A CN114576798A CN 114576798 A CN114576798 A CN 114576798A CN 202210319580 A CN202210319580 A CN 202210319580A CN 114576798 A CN114576798 A CN 114576798A
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- 238000000034 method Methods 0.000 title claims abstract description 37
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Classifications
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/70—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
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The embodiment of the application discloses a multi-split air conditioning system and a control method thereof, relates to the technical field of air conditioners, and can improve the matching detection efficiency of indoor units and electronic expansion valves in the multi-split air conditioning system. This air conditioning system includes: an outdoor unit; the system comprises a plurality of indoor units, a control unit and a control unit, wherein an electronic expansion valve is arranged between each indoor unit and the outdoor unit, and each indoor unit comprises a first temperature sensor for detecting the temperature of the indoor unit; a plurality of electronic expansion valves; a controller configured to: starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to run in a refrigeration mode; closing the target electronic expansion valve; after a second preset time, collecting a second temperature value of each indoor unit at a second moment, and selecting the indoor unit with the maximum second temperature value as a target indoor unit; and if the difference value obtained by subtracting the first temperature average value from the second temperature value of the target indoor unit is greater than the third temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a multi-split air conditioner system and a control method thereof.
Background
With the development of economic society, air conditioners are increasingly widely used in various places such as entertainment, home and work. When a plurality of small areas in the same area need to use air conditioners, a multi-split air conditioning system is often adopted to regulate and control the room temperature of multiple areas in consideration of saving of electric energy.
In actual installation and use, the indoor units and the electronic expansion valves in the multi-split air conditioning system may be mistakenly paired, and generally, each indoor unit is manually debugged, and after the debugging is completed, the address of the relevant indoor unit or the address of the electronic expansion valve is individually changed. The debugging mode causes the workload of installation and debugging personnel to be larger, and the work efficiency of online debugging is lower.
Disclosure of Invention
The embodiment of the application provides a multi-split air conditioning system and a control method thereof, which are used for improving the efficiency of pairing detection of an electronic expansion valve and an indoor unit in the air conditioning system.
In a first aspect, an embodiment of the present application provides a multi-split air conditioning system, which includes: an outdoor unit; the system comprises a plurality of indoor units, a control unit and a control unit, wherein an electronic expansion valve is arranged between each indoor unit and the outdoor unit, and each indoor unit comprises a first temperature sensor for detecting the temperature of the indoor unit; a plurality of electronic expansion valves for adjusting a supply amount of the refrigerant; a controller configured to: starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to run in a refrigeration mode; closing the target electronic expansion valve; after a second preset time, collecting second temperature values of the indoor units at a second moment, and selecting the indoor unit with the maximum second temperature value as a target indoor unit; and if the difference value of the second temperature value of the target indoor unit minus the first temperature average value is greater than a third temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve, wherein the first temperature average value is determined according to the second temperature value of each indoor unit.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects: in a refrigeration mode, after the outdoor unit, each indoor unit and each electronic expansion valve are started for a period of time, the electronic expansion valve to be detected is closed, the refrigeration effect is reduced because the indoor unit connected with the electronic expansion valve is lack of refrigerant, and the temperature value of the indoor unit is obviously higher than that of other indoor units. Therefore, the indoor unit with the highest temperature is taken as the target indoor unit, if the difference between the second temperature value of the target indoor unit and the first temperature average value of the indoor unit is large, the target indoor unit is considered to be obviously affected by the electronic expansion valve, and the indoor unit connected with the electronic expansion valve to be detected can be determined. Based on this, can detect out the indoor set that pairs with the electronic expansion valve that awaits measuring through air conditioning system automated inspection, improve detection efficiency, and saved the manpower.
In some embodiments, the outdoor unit includes a second temperature sensor for detecting a temperature of the outdoor unit, and the controller is specifically configured to: acquiring a temperature value of an outdoor unit; and when the temperature value of the outdoor unit is greater than or equal to the first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a cooling mode.
It should be understood that when the temperature value of the outdoor unit is greater than or equal to the first temperature threshold, the outdoor temperature is higher and the weather is hotter. On the one hand, when the pairing condition of the indoor units and the electronic expansion valve is detected, the indoor units are controlled to operate in a refrigeration mode, so that the indoor temperature is reduced, the energy is fully utilized, and the user experience is improved while the pairing condition is detected. On the other hand, after the electronic expansion valve to be detected is closed subsequently, the temperature of the indoor unit connected with the electronic expansion valve is obviously increased and is obviously higher than that of other indoor units. Therefore, a proper working mode can be selected according to the environmental temperature so as to reduce the environmental interference and more accurately judge the indoor unit connected with the electronic expansion valve to be detected.
In some embodiments, the controller is specifically configured to: under the condition that a first preset condition is met, closing the target electronic expansion valve; wherein the first preset condition comprises one or more of the following: the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units at the first moment is smaller than a second temperature threshold value, and the first moment is before the second moment; or the duration of the operation refrigeration mode of the indoor unit reaches a first preset duration.
It should be understood that the closing of the target electronic expansion valve is for comparing the temperature conditions of the respective indoor units after the target electronic expansion valve is closed. Therefore, before the target electronic expansion valve is closed, the indoor units are kept stable at similar temperatures. When the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units is smaller than the second temperature threshold value, the temperature of each indoor unit is close, the running condition is close, and the indoor units are in a stable working state. After the air conditioning system operates for the first preset time, each indoor unit is in a stable working state, and the requirements can be considered to be met.
In some embodiments, the controller is further configured to: when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state; and sending alarm information for prompting that pairing errors exist between the indoor units and the electronic expansion valve when the temperature value of at least one indoor unit in the non-starting state in the fifth preset time period is smaller than the sixth temperature threshold value and the temperature value of at least one indoor unit in the starting state in the fifth preset time period is larger than the seventh temperature threshold value.
It should be understood that, when the air conditioning system is in the cooling state, if a temperature value of at least one indoor unit in the non-powered-on state within a fifth preset time period is less than a sixth temperature threshold value, it indicates that the indoor unit in the non-powered-on state is affected by the refrigerant, and an electronic expansion valve connected to the indoor unit in the non-powered-on state is in an open state. At this time, if there is a situation that the temperature value of at least one indoor unit in the on state in the fifth preset time period is greater than a seventh temperature threshold value, the indoor unit in the on state lacks a refrigerant, and an electronic expansion valve connected with the indoor unit in the on state is in a closed state. Therefore, when the air conditioning system has the condition that the address matching of the electronic expansion valve and the indoor unit is wrong, the air conditioning system is controlled to give an alarm to remind a user of closing the air conditioning system or correcting the address in time.
In a second aspect, an embodiment of the present application further provides a multi-split air conditioning system, where the system includes: an outdoor unit; the system comprises a plurality of indoor units, a control unit and a control unit, wherein an electronic expansion valve is arranged between each indoor unit and the outdoor unit, and each indoor unit comprises a first temperature sensor for detecting the temperature of the indoor unit; a plurality of electronic expansion valves for adjusting a supply amount of the refrigerant; a controller configured to: starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode; closing the target electronic expansion valve; after a fourth preset time, collecting fourth temperature values of all indoor units at a fourth moment, and selecting the indoor unit with the maximum fourth temperature value as a target indoor unit; and if the difference value of the fourth temperature value of the target indoor unit minus the second temperature average value is larger than a fifth temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve, wherein the second temperature average value is determined according to the fourth temperature value of each indoor unit.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects: after the outdoor unit, the indoor units and the electronic expansion valves are started for a period of time, the electronic expansion valve to be detected is closed, the temperature difference of the indoor units after the electronic expansion valve to be detected is closed is compared, and the heating effect of the indoor unit connected with the electronic expansion valve is reduced due to lack of refrigerant. Therefore, the temperature value of the indoor unit connected to the electronic expansion valve is significantly lower than that of the other indoor units. Therefore, the indoor unit with the lowest temperature is taken as the target indoor unit, if the difference between the fourth temperature value of the target indoor unit and the second average temperature value of the indoor unit is large, the target indoor unit is considered to be obviously affected by the electronic expansion valve, and the indoor unit connected with the electronic expansion valve to be detected can be determined. Based on this, can be through air conditioning system automated inspection out of waiting to detect the paired indoor set of electronic expansion valve, improved detection efficiency, and saved the manpower.
In some embodiments, the controller is further configured to: acquiring a temperature value of an outdoor unit; and when the temperature value of the outdoor unit is smaller than the first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode.
It should be understood that when the temperature value of the outdoor unit is less than the first temperature threshold, the outdoor temperature is lower, and the weather is cooler. On the one hand, when the pairing condition of the indoor units and the electronic expansion valve is detected, the indoor units are controlled to operate in a heating mode, so that the indoor temperature is improved, the energy is fully utilized, and the user experience is improved while the pairing condition is detected. On the other hand, after the electronic expansion valve to be detected is closed subsequently, the temperature of the indoor unit connected with the electronic expansion valve is obviously reduced and is obviously lower than that of other indoor units. Therefore, a proper working mode can be selected according to the environmental temperature so as to reduce the environmental interference and more accurately judge the indoor unit connected with the electronic expansion valve to be detected.
In some embodiments, the controller is further configured to: under the condition that a second preset condition is met, closing the target electronic expansion valve; wherein the second preset condition comprises one or more of the following: the difference between the maximum temperature value and the minimum temperature value in third temperature values of each indoor unit at a third moment is less than or equal to a fourth temperature threshold, and the third moment is before the fourth moment; or the duration of the heating mode operated by the indoor unit reaches a third preset duration.
It should be understood that the closing of the target electronic expansion valve is performed in order to compare the temperature conditions of the respective indoor units after the target electronic expansion valve is closed. Therefore, before the target electronic expansion valve is closed, the indoor units are kept stable at similar temperatures. When the difference between the maximum temperature value and the minimum temperature value in the third temperature values of the indoor units is smaller than or equal to the fourth temperature threshold value, the temperature of each indoor unit is close, the running condition is close, and the indoor units are in a stable working state. When the air conditioning system operates for a third preset time, each indoor unit is in a stable working state, and the requirements can be considered to be met.
In some embodiments, the controller is further configured to: when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state; and sending alarm information for prompting that pairing errors exist between the indoor units and the electronic expansion valve when the temperature value of at least one indoor unit in the non-starting state in the fifth preset time period is smaller than the sixth temperature threshold value and the temperature value of at least one indoor unit in the starting state in the fifth preset time period is larger than the seventh temperature threshold value.
It should be understood that, when the air conditioning system is in the cooling state, if a temperature value of at least one indoor unit in the non-powered-on state within a fifth preset time period is less than a sixth temperature threshold value, it indicates that the indoor unit in the non-powered-on state is affected by the refrigerant, and an electronic expansion valve connected to the indoor unit in the non-powered-on state is in an open state. At this time, if there is a situation that the temperature value of at least one indoor unit in the on state within the fifth preset time period is greater than a seventh temperature threshold value, the indoor unit in the on state lacks a refrigerant, and an electronic expansion valve connected with the indoor unit in the on state is in a closed state. Therefore, when the air conditioning system has the condition that the address matching of the electronic expansion valve and the indoor unit is wrong, the air conditioning system is controlled to give an alarm to remind a user of closing the air conditioning system or correcting the address in time.
In a third aspect, an embodiment of the present application provides a method for controlling a multi-split air conditioning system, including: starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to run in a refrigeration mode; closing the target electronic expansion valve; after a second preset time, collecting second temperature values of the indoor units at a second moment, and selecting the indoor unit with the maximum second temperature value as a target indoor unit; and if the difference value of the second temperature value of the target indoor unit minus the first temperature average value is greater than a third temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve, wherein the first temperature average value is determined according to the second temperature value of each indoor unit.
In some embodiments, the starting the outdoor unit, the indoor units and the electronic expansion valves to enable the indoor units to operate in a cooling mode includes: acquiring a temperature value of an outdoor unit; and when the temperature value of the outdoor unit is greater than or equal to the first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a cooling mode.
In some embodiments, the closing the target electronic expansion valve includes: under the condition that a first preset condition is met, closing the target electronic expansion valve; wherein the first preset condition comprises one or more of the following: the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units at the first moment is smaller than a second temperature threshold value, and the first moment is before the second moment; or the duration of the operation refrigeration mode of the indoor unit reaches a first preset duration.
In some embodiments, the above method further comprises: when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state; and sending alarm information for prompting that pairing errors exist between the indoor units and the electronic expansion valve when the temperature value of at least one indoor unit in the non-starting state in the fifth preset time period is smaller than the sixth temperature threshold value and the temperature value of at least one indoor unit in the starting state in the fifth preset time period is larger than the seventh temperature threshold value.
In a fourth aspect, an embodiment of the present application provides a method for controlling a multi-split air conditioning system, including: starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode; closing the target electronic expansion valve; after a fourth preset time, collecting fourth temperature values of all indoor units at a fourth moment, and selecting the indoor unit with the maximum fourth temperature value as a target indoor unit; and if the difference value of the fourth temperature value of the target indoor unit minus the second temperature average value is larger than a fifth temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve, wherein the second temperature average value is determined according to the fourth temperature value of each indoor unit.
In some embodiments, the starting the outdoor unit, each indoor unit, and each electronic expansion valve to operate each indoor unit in a heating mode includes: acquiring a temperature value of an outdoor unit; and when the temperature value of the outdoor unit is smaller than the first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode.
In some embodiments, the closing the target electronic expansion valve includes: under the condition that a second preset condition is met, closing the target electronic expansion valve; wherein the second preset condition comprises one or more of the following: the difference between the maximum temperature value and the minimum temperature value in the third temperature values of the indoor units at the third moment is smaller than or equal to a fourth temperature threshold, and the third moment is positioned before the fourth moment; or the duration of the heating mode operated by the indoor unit reaches a third preset duration.
In some embodiments, the above method further comprises: when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state; and sending alarm information for prompting that pairing errors exist between the indoor units and the electronic expansion valve when the temperature value of at least one indoor unit in the non-starting state in the fifth preset time period is smaller than the sixth temperature threshold value and the temperature value of at least one indoor unit in the starting state in the fifth preset time period is larger than the seventh temperature threshold value.
In a fifth aspect, there is provided a control apparatus of a multi-split air conditioning system, including: one or more processors; one or more memories; wherein the one or more memories are for storing computer program code comprising computer instructions which, when executed by the one or more processors, cause the controller to perform the method provided in the third or fourth aspect and possible implementations.
A sixth aspect provides a computer-readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform the method provided in the third or fourth aspect and possible implementations.
In a seventh aspect, a computer program product is provided, which comprises computer instructions, which when run on a computer, cause the computer to perform the method provided in the third or fourth aspect and possible implementations.
It should be noted that all or part of the computer instructions may be stored on the computer readable storage medium. The computer readable storage medium may be packaged with or separately from a processor of the controller, which is not limited in this application.
For the beneficial effects described in the second to seventh aspects of the present application, reference may be made to beneficial effect analysis of the first aspect or the second aspect, and details are not repeated here.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic view illustrating a connection manner between an indoor unit and an electronic expansion valve of a multi-split air conditioning system according to some embodiments;
fig. 2 is a first schematic structural diagram of a multi-split air conditioning system according to some embodiments;
FIG. 3 is a second schematic diagram of another multi-split air conditioning system according to some embodiments;
fig. 4 is a schematic view illustrating a refrigeration cycle of a multi-split air conditioning system according to some embodiments;
FIG. 5 is a schematic diagram of a controller according to some embodiments;
fig. 6 is a first schematic diagram illustrating interaction between a controller and a terminal device of a multi-split air conditioning system according to some embodiments;
fig. 7 is a first schematic view of a management page of a terminal device according to some embodiments;
fig. 8 is a second schematic management page of another terminal device according to some embodiments;
fig. 9 is a first flowchart illustrating a control method of a multi-split air conditioning system according to some embodiments;
FIG. 10 is a flowchart illustrating a second method for controlling a multi-split air conditioning system according to some embodiments;
fig. 11 is a second schematic diagram illustrating interaction between a controller and a terminal device of another multi-split air conditioning system according to some embodiments;
fig. 12 is a third schematic view illustrating interaction between a controller and a terminal device of a further multi-split air conditioning system according to some embodiments;
fig. 13 is a third schematic management page of yet another terminal device according to some embodiments;
fig. 14 is a flowchart illustrating a third method for controlling a multi-split air conditioning system according to some embodiments;
fig. 15 is a fourth flowchart illustrating a control method of a multi-split air conditioning system according to some embodiments;
fig. 16 is a flowchart illustrating a control method of a multi-split air conditioning system according to another embodiment;
fig. 17 is a schematic diagram of a hardware configuration of a controller according to some embodiments.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In addition, when a pipeline is described, the terms "connected" and "connected" are used in this application to have a meaning of conducting. The specific meaning is to be understood in conjunction with the context.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
As described in the background, in real life, people often realize the control of the room temperature of multiple areas by using a multi-online air conditioning system. For some multi-split air conditioning systems, each indoor unit is located inside a room, and each electronic expansion valve connected to each indoor unit is located outside the room, at this time, since the multi-split air conditioning system has a plurality of indoor units, a situation that the indoor units and the electronic expansion valves are paired incorrectly may occur.
Exemplarily, fig. 1 shows a connection manner of an indoor unit and an electronic expansion valve. Referring to fig. 1, an indoor unit 1a and an electronic expansion valve 1b are connected by a gas-liquid pipe 1c, an indoor unit 2a and an electronic expansion valve 3b are connected by a gas-liquid pipe 2c, and an indoor unit 3a and an electronic expansion valve 2b are connected by a gas-liquid pipe 3 c. And the indoor unit 1a, the indoor unit 2a, the indoor unit 3a, the electronic expansion valve 1b, the electronic expansion valve 2b and the electronic expansion valve 3b are all in communication connection with the controller (as shown by the dotted line in fig. 1). The pairing information recorded by the controller is shown in table 1. The address of the indoor unit 1a is 1a, the address of the indoor unit 2a is 2a, and the address of the indoor unit 3a is 3 a; the address of the electronic expansion valve 1b is 1b, the address of the electronic expansion valve 2b is 2b, and the address of the electronic expansion valve 3b is 3 b.
TABLE 1
| Serial number | Indoor machine address | Electronic expansion valve address |
| 1 | 1a | 1b |
| 2 | 2a | 2b |
| 3 | 3a | 3b |
According to the pairing condition information shown in table 1, when the multi-split air conditioning system starts the indoor unit 1a, the controller starts the electronic expansion valve 1b according to the address information recorded in table 1, and referring to fig. 1, if the indoor unit 1a and the electronic expansion valve 1a are normally connected through the gas-liquid pipe 1c, the indoor unit 1a normally operates. When the indoor unit 2a needs to be opened, the controller opens the electronic expansion valve 2b according to the information recorded in table 1, referring to fig. 1, no gas-liquid pipe connection exists between the indoor unit 2a and the electronic expansion valve 2b, at this time, the indoor unit 2a lacks a refrigerant, and the heating or cooling effect is poor; in addition, when the electronic expansion valve 2b is opened, the corresponding indoor unit 3a is not opened, which causes the refrigerant passing through the electronic expansion valve 2b to return to the compressor (not shown in fig. 1) without sufficient heat exchange, resulting in energy waste, adverse effect on system reliability, and machine life damage.
Therefore, when the multi-split air conditioning system is used, the matching condition of the indoor unit and the electronic expansion valve is detected in time, and address correction is needed when the matching is wrong.
Generally, the pairing condition of the indoor unit and the electronic expansion valve is manually detected. In the debugging process, each indoor unit is manually debugged, and after the debugging is finished, the address of the related indoor unit or the electronic expansion valve needs to be independently changed. The mode consumes manpower, and when the indoor unit is more, the workload of installation and debugging personnel is larger, and the debugging efficiency of the multi-split air conditioning system is lower.
In view of the above, the embodiment of the present application provides a multi-split air conditioning system and a control method thereof, in which after an outdoor unit, each indoor unit, and each electronic expansion valve are started for a period of time, the electronic expansion valve to be detected is closed; and after the electronic expansion valve to be detected is closed, comparing the temperature difference of each indoor unit, and further determining the indoor unit corresponding to the electronic expansion valve to be detected. It can be understood that, after the electronic expansion valve to be detected is closed, the indoor unit connected to the electronic expansion valve will have a reduced cooling or heating effect due to lack of refrigerant. Therefore, if the air conditioning system is in a heating mode, the temperature value of the indoor unit connected with the electronic expansion valve to be detected is obviously lower than that of other indoor units; or, if the air conditioning system is in the cooling mode, the temperature value of the indoor unit connected with the electronic expansion valve is obviously higher than that of other indoor units. Therefore, the indoor unit with the lowest temperature during heating or the indoor unit with the highest temperature during cooling is taken as the target indoor unit, if the difference between the temperature value of the target indoor unit and the average temperature value of the indoor units is large, the target indoor unit is considered to be obviously affected by the electronic expansion valve, and the indoor unit connected with the electronic expansion valve to be detected can be determined. Based on this, can be through air conditioning system automated inspection out of waiting to detect the paired indoor set of electronic expansion valve, improved detection efficiency, and saved the manpower.
To further describe the solution of the present application, fig. 2 shows a schematic structural diagram of a multi-split air conditioning system provided in an embodiment of the present application.
Referring to fig. 2 or 3, the air conditioning system 10 includes: an outdoor unit 11, a throttle device 12, a plurality of indoor units 13, and a controller (not shown).
Wherein the throttling device 12 comprises a plurality of electronic expansion valves 121. There is a pipe connection between the outdoor unit 11 and the indoor units 13, and an electronic expansion valve 121 is disposed on the pipe between each indoor unit 13 and the outdoor unit 11. The conduit, also known as a gas-liquid line, comprises: a gas pipe for conveying gaseous refrigerant, and a liquid pipe for conveying two-phase refrigerant. In addition, the outdoor unit 11, the throttling device 12 and the indoor units 13 are all connected with a controller in a communication way (not shown in the figure), and relevant operations are executed according to instructions of the controller.
The outdoor unit 11 is generally installed outdoors to assist heat exchange in indoor environments. The throttling device 12 is used for adjusting the flow rate of fluid in a gas-liquid pipe of the air conditioner and adjusting the flow rate of refrigerant. The electronic expansion valves 121 are used for adjusting the amount of refrigerant supplied to the pipes, and the electronic expansion valves 121 may be independent of the outdoor unit 11 (as shown in fig. 2) or may be attached to a part of the outdoor unit 11 (as shown in fig. 3). The indoor units 13 may be indoor on-hook machines or indoor cabinet machines, which is not limited in this embodiment of the application. The number of electronic expansion valves and the number of indoor units shown in fig. 2 or 3 are merely examples, and the present embodiment is not particularly limited.
Taking the example that the electronic expansion valves 121 are independent from the outdoor unit 11, fig. 4 shows a schematic diagram of a refrigeration cycle of a multi-split air conditioning system.
As shown in fig. 4, the multi-split air conditioning system includes an outdoor unit 11, a throttling device 12, a plurality of indoor units 13, and a controller (not shown in fig. 4).
The outdoor unit 11 includes: a compressor 111, an outdoor heat exchanger 112, an accumulator 113, and a four-way valve 114. In some embodiments, the outdoor unit 11 further comprises one or more of: a second temperature sensor 115 for detecting an outdoor ambient temperature, an outdoor fan (not shown in fig. 4), and an outdoor fan motor (not shown in fig. 4).
The throttling device 12 is used for adjusting the flow rate of fluid in a gas-liquid pipe of the air conditioner. Wherein the throttling device 12 comprises a plurality of electronic expansion valves 121. The plurality of electronic expansion valves 121 are disposed on pipes between the plurality of indoor units 13 and the outdoor unit 11, and control the supply amount of the refrigerant.
The indoor unit 13 includes: an indoor heat exchanger 131 and an indoor fan 133. In some embodiments, the indoor unit 13 further comprises one or more of: a first temperature sensor 132 for detecting an indoor temperature, an indoor fan motor (not shown in fig. 4), and a display (not shown in fig. 4).
In some embodiments, the compressor 111 is disposed between the throttling device 12 and the accumulator 113, and is configured to compress the refrigerant delivered by the accumulator 1113 and deliver the compressed refrigerant to the throttling device 12 via the four-way valve 114. The compressor 111 may be an inverter compressor with variable capacity that performs rotational speed control by an inverter.
In some embodiments, the outdoor heat exchanger 112 is connected at one end to the accumulator 113 via a four-way valve 114 and at the other end to the throttling device 12. The outdoor heat exchanger 112 has a first inlet and outlet for allowing the refrigerant to flow between the outdoor heat exchanger 112 and the suction port of the compressor 111 via the accumulator 113, and has a second inlet and outlet for allowing the refrigerant to flow between the outdoor heat exchanger 112 and the expansion device 12. The outdoor heat exchanger 112 exchanges heat between the outdoor air and the hot cooler flowing through the heat transfer pipe connected between the first inlet and the second inlet, and the outdoor heat exchanger 112 operates as a condenser in the cooling cycle.
In some embodiments, the accumulator 113 is connected to the compressor 111 at one end and to the outdoor heat exchanger 112 through a four-way valve 114 at the other end. In the accumulator 113, the refrigerant flowing from the outdoor heat exchanger 112 to the compressor 111 via the four-way valve 114 is separated into a gas refrigerant and a liquid refrigerant. Then, the gas refrigerant is mainly supplied from the accumulator 113 to the suction port of the compressor 111.
In some embodiments, four ports of the four-way valve 114 are connected to the compressor 111, the outdoor heat exchanger 112, the accumulator 113, and the plurality of electronic expansion valves 121, respectively. The four-way valve 114 is used for switching between cooling and heating by changing the flow direction of the refrigerant in the system pipeline.
In some embodiments, the outdoor fan causes heat exchange between the refrigerant flowing in the heat transfer pipe between the first inlet and the second inlet and the outdoor air by generating an airflow of the outdoor air through the outdoor heat exchanger 112.
In some embodiments, an outdoor fan motor is used to drive or vary the rotational speed of the outdoor fan.
In some embodiments, the electronic expansion valve 121 has a function of expanding and decompressing the refrigerant flowing through the electronic expansion valve 121, and may be used to adjust the supply amount of the refrigerant in the pipe. When the electronic expansion valve 121 decreases in opening degree, the flow resistance of the refrigerant passing through the electronic expansion valve 121 increases. When the electronic expansion valve 121 increases the opening degree, the flow resistance of the refrigerant passing through the electronic expansion valve 121 decreases. In this way, even if the state of other components in the circuit does not change, when the opening degree of the electronic expansion valve 121 changes, the flow rate of the refrigerant flowing to the indoor unit 13 changes.
In some embodiments, the indoor heat exchanger 131 has a third inlet and outlet for passing liquid refrigerant between the electronic expansion valve 121 and a fourth inlet and outlet for passing gas refrigerant between the discharge port of the compressor 111. The indoor heat exchanger 131 exchanges heat between the refrigerant flowing through the heat transfer pipe connected between the third inlet and the fourth inlet and the indoor air.
In some embodiments, the indoor fan 133 generates an airflow of the indoor air passing through the indoor heat exchanger 131 to promote heat exchange between the refrigerant flowing in the heat transfer pipe between the third inlet and the fourth inlet and the indoor air.
In some embodiments, the indoor fan motor 133 is used to drive or vary the rotational speed of the indoor fan 113.
In some embodiments, the display is used to display the indoor temperature or the current operating mode.
In the embodiments shown in the present application, the controller is a device capable of generating an operation control signal according to the command operation code and the timing signal, and instructing the multi-split air conditioning system to execute the control command. For example, the controller may be a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The controller may also be other devices with processing functions, such as a circuit, a device, or a software module, which is not limited in any way by the embodiments of the present application.
Fig. 5 is a schematic structural diagram of a controller according to an embodiment of the present disclosure. As shown in fig. 5, the controller 14 includes an outdoor control module 141 and an indoor control module 142. The outdoor control module 141 includes a first memory 1411, and the indoor control module 142 includes a second memory 1421. The indoor unit control module 142 is connected to the outdoor unit control module 141 through wired or wireless communication. The outdoor control module 141 may be installed in the outdoor unit 11, or may be independent of the outdoor unit 11, and is used for controlling the outdoor unit 11 and the throttling device 12 to perform related operations. The indoor control module 142 may be installed in the indoor unit 13, or may be independent from the indoor unit 13 and used for controlling components of the indoor unit 13 to perform related operations. It should be understood that the division of the above modules is only a division of functionality, and the outdoor control module 141 and the indoor control module 142 may also be integrated into one module. The first memory 1411 and the second memory 1421 may also be integrated into one memory.
In some embodiments, the first memory 1411 is used for storing applications and data related to the outdoor unit 11 and the electronic expansion valve 121, and the outdoor control module 141 performs various functions of the air conditioning system and data processing by operating the applications and data stored in the memory 1411. The first memory 1411 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function (such as an outdoor unit fan opening function, an outdoor temperature measurement function, etc.); the storage data area may store data (such as outdoor temperature, opening degree of each electronic expansion valve, etc.) created according to use of the air conditioning system. In addition, the first memory 1411 may include a high-speed random access memory, and may also include a non-volatile memory, such as a magnetic disk storage device, a flash memory device, or other volatile solid-state storage device.
In some embodiments, the second memory 1421 is used to store applications and data related to the indoor unit 13, and the indoor control module 1421 performs various functions of the air conditioning system and data processing by operating the applications and data stored in the memory 1421. The second memory 1421 mainly includes a program storage area and a data storage area, where the program storage area may store an operating system and application programs required by at least one function (such as an indoor unit fan starting function, an indoor temperature measurement function, etc.); the storage data area may store data (such as indoor temperature, etc.) created according to the use of the air conditioning system. In some examples, the second memory 1421 is further configured to store a correspondence relationship between an address of the indoor unit 13 and an address of the electronic expansion valve 121.
In some embodiments, there is a communication connection between the outdoor control module 141 and the outdoor unit 11, for controlling the outdoor unit to perform related operations according to a user instruction or a system default instruction. Alternatively, the outdoor control module 141 may control the rotation speed of the outdoor fan according to the air-conditioning operation mode selected by the user. Alternatively, the outdoor control module 141 may also acquire an outdoor temperature according to a user instruction or a system instruction and store the acquired outdoor temperature in the first memory 1411. Alternatively, the outdoor control module 141 may also control the four-way valve 114 in the outdoor unit 11 to rotate according to the air-conditioning operation mode selected by the user, so as to implement the selection of the cooling or heating mode. Alternatively, the outdoor control module 141 may also control an operation mode, a compressor frequency, and the like of the outdoor unit 11 in the address correction process.
In some embodiments, the outdoor control module 141 is in communication with the plurality of electronic expansion valves 121 for controlling the plurality of electronic expansion valves to perform related operations according to a user command or a system default command. Alternatively, the outdoor control module 141 may also control the opening degree of each electronic expansion valve 121 according to a user instruction or a system instruction.
In some embodiments, the indoor control module 142 is communicatively connected to the indoor unit 13, and is configured to control the indoor unit 13 to perform related operations according to a user instruction or a system default instruction. Optionally, the indoor control module 142 controls the indoor unit 13 to turn on the indoor fan and the fan motor according to the user instruction. Optionally, the indoor control module 142 may also control the indoor unit to turn on or turn off a compressor in the indoor unit according to a user instruction. Optionally, the indoor control module 142 may further control the indoor unit to turn on an indoor temperature sensor according to a user instruction, so as to detect indoor temperature measurement.
It should be understood that the embodiments shown in fig. 4 and 5 are exemplified by the throttling device 12 being independent from the outdoor unit 11, and if the throttling device 12 is located inside the outdoor unit 11, the refrigeration cycle principle of the above air conditioning system is still applicable, and will not be described in detail below.
Fig. 6 is an interaction diagram of a controller 14 and a terminal device 300 of a multi-split air conditioning system according to an embodiment of the present disclosure.
As shown in fig. 6, the terminal device 300 may establish a communication connection with the controller 14 of the air conditioning system. Establishment of the communication connection may be accomplished, illustratively, using any known network communication protocol. The network communication protocol may be any of a variety of wired or wireless communication protocols, such as Ethernet, Universal Serial Bus (USB), FIREWIRE (FIREWIRE), any cellular communication protocol (e.g., 3G/4G/5G), Bluetooth, Wireless Fidelity (Wi-Fi), NFC, or any other suitable communication protocol. The communication connection may be a bluetooth connection, NFC, zigbee, wireless fidelity (Wi-Fi), or the like. This is not particularly limited by the examples of the present application.
It should be noted that the terminal device 300 shown in fig. 6 is only one example of a terminal device. The terminal device 300 in the present application may be a remote controller, a mobile phone, a tablet computer, a Personal Computer (PC), a Personal Digital Assistant (PDA), a smart watch, a netbook, a wearable electronic device, an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, etc., and the present application does not make any special limitation on the specific form of the terminal device.
Taking the terminal device 300 as a mobile phone as an example, in some embodiments, the operation mode of the air conditioning system may be set by the terminal device. Illustratively, as shown in fig. 7, a management interface 301 of the multi-split air conditioning system is displayed on the terminal device, and the management interface 301 includes a "mode management" button 302. Detecting that the user clicks the "mode management" button 302 in the management interface 301, the terminal device pops up the operation mode drop-down selection box 303 on the management page 301. After detecting that the user selects the selection instruction in the operation mode pull-down selection box 303, the terminal device sends the instruction to the multi-split air conditioning system to complete the setting of the operation mode.
In some embodiments, the user may initiate the address correction function through the management interface of the terminal device 300. As shown in fig. 8, the management interface 301 of the terminal device includes a "pairing detection" button, where a button 3041 shown in fig. 8 is an off state of the "pairing detection" button, and when the terminal device detects that a user clicks a switch of the "pairing detection" button, the state of the "pairing detection" button is changed to an on state shown by 3042, and an instruction for turning on the pairing detection is transmitted to the multi-split air conditioning system, so that the air conditioning system enters the pairing detection of the electronic expansion valve and the indoor unit.
The embodiments provided in the present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 9, an embodiment of the present application provides a control method of a multi-split air conditioning system, including:
and S101, starting the outdoor unit, each indoor unit and each electronic expansion valve by a controller of the multi-split air conditioning system so that each indoor unit can operate in a cooling mode.
The electronic expansion valve is used for adjusting the supply amount of the refrigerant in the pipeline.
In some embodiments, as shown in fig. 10, step S101 is implemented as the following steps:
s1011, the controller obtains the temperature value of the outdoor unit.
Optionally, the multi-split air conditioning system may acquire a temperature value of the outdoor unit through a second temperature sensor built in the outdoor unit.
And S1012, when the temperature value of the outdoor unit is greater than or equal to the first temperature threshold value, the controller starts the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a cooling mode.
In some examples, step S1012 is implemented as the following steps: starting the outdoor unit and each indoor unit, controlling the compressor to operate at a preset frequency, controlling the fans of each indoor unit to rotate at the same preset frequency, starting the electronic expansion valves, and controlling each electronic expansion valve to operate at the same preset opening degree.
It should be understood that when the temperature value of the outdoor unit is greater than or equal to the first temperature threshold, the outdoor temperature is higher and the weather is hotter. On the one hand, when the pairing condition of the indoor units and the electronic expansion valve is detected, the indoor units are controlled to operate in a refrigeration mode, so that the indoor temperature is reduced, the energy is fully utilized, and the user experience is improved while the pairing condition is detected. On the other hand, after the electronic expansion valve to be detected is closed subsequently, the temperature of the indoor unit connected with the electronic expansion valve is obviously increased and is obviously higher than that of other indoor units. Therefore, a proper working mode can be selected according to the environmental temperature so as to reduce the environmental interference and more accurately judge the indoor unit connected with the electronic expansion valve to be detected.
And S102, the controller of the multi-split air conditioning system closes the target electronic expansion valve.
Wherein, the target electronic expansion valve is an electronic expansion valve to be detected.
In some embodiments, step S102 is specifically implemented as: and the controller of the multi-split air-conditioning system closes the target electronic expansion valve, keeps other electronic expansion valves to continuously operate at the same opening degree while closing the target electronic expansion valve, rotates each indoor unit at the same fan frequency, and keeps the outdoor unit of the multi-split air-conditioning system to continuously operate.
In some embodiments, the controller of the multi-split air conditioning system closes the target electronic expansion valve in case that the first preset condition is satisfied. Wherein the first preset condition comprises one or more of the following:
in condition 1, the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units at the first moment is smaller than the second temperature threshold.
It should be understood that the closing of the target electronic expansion valve is performed in order to compare the temperature conditions of the respective indoor units after the target electronic expansion valve is closed. Therefore, before the target electronic expansion valve is closed, the indoor units are kept stable at similar temperatures. When the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units is smaller than the second temperature threshold value, the temperature of each indoor unit is close, the running condition is close, and the indoor units are in a stable working state.
And 2, the duration of the operation refrigeration mode of the indoor unit reaches a first preset duration.
It should be understood that before the target electronic expansion valve is closed, it should be ensured that each indoor unit maintains a stable state at a similar temperature, so as to compare the temperature conditions of each indoor unit after the target electronic expansion valve is closed. After the air conditioning system operates for the first preset time, each indoor unit is in a stable working state, and the requirements can be considered to be met.
And S103, after a second preset time, the controller collects second temperature values of the indoor units at a second moment, and selects the indoor unit with the largest second temperature value as a target indoor unit.
Wherein the second time is after the first time.
In some embodiments, the controller collects a second temperature value of each indoor unit at a second time through a first temperature sensor built in each indoor unit.
Illustratively, taking the second preset time period as 20 minutes as an example, if 4 indoor units exist in the multi-split air conditioning system, after the target electronic expansion valve is closed for 20 minutes, the second temperature values acquired by the controller through the first temperature sensors built in the indoor units are 22 ℃, 21 ℃ and 32 ℃, respectively, and then the indoor unit with the second temperature value of 32 ℃ is taken as the target indoor unit.
It is understood that when the target electronic expansion valve is closed, the indoor unit connected to the target electronic expansion valve will have a large difference in temperature from the other indoor units due to the lack of refrigerant. But this temperature difference is not abrupt but gradually develops over time. Therefore, in order to capture the temperature difference, the temperature of each indoor unit should be obtained after the target electronic expansion valve is closed and the air conditioning system is operated for a second preset time. In addition, since the air conditioning system of step S103 is in the cooling mode, the indoor unit connected to the target electronic expansion valve is short of refrigerant, and thus the cooling capacity is significantly reduced. At this time, the indoor unit with the highest temperature in the air conditioning system is most likely to be the indoor unit connected with the target electronic expansion valve, so that the indoor unit with the highest temperature in the air conditioning system is taken as the target indoor unit, and whether the target indoor unit is matched with the target electronic expansion valve or not is further judged.
And S104, if the difference value of the second temperature value of the target indoor unit minus the first temperature average value is larger than a third temperature threshold value, determining that the target indoor unit is matched with the target electronic expansion valve.
And the first temperature average value is determined according to the second temperature value of each indoor unit.
Alternatively, the first temperature average value may be an average value of the second temperature values of the respective indoor units.
For example, if the second temperature value of the target indoor unit is 30 ℃, and the second temperature values of the other indoor units are 13 ℃, 11 ℃ and 12 ℃, respectively, the average value of the first temperatures is ((30+13+11+12)/4) ° c, which is 16.5 ℃.
It is understood that, after the target electronic expansion valve to be detected is closed, the indoor unit connected to the target electronic expansion valve is deficient in refrigerant, and thus the cooling effect is reduced. At this time, the temperature value of the indoor unit connected to the target electronic expansion valve is significantly higher than that of the other indoor units. And when the average value of the second temperature values of the indoor units is taken as the first temperature average value, if the difference value of the second temperature value of the target indoor unit minus the temperature average value is greater than a third temperature threshold value, the second temperature value of the target indoor unit is considered to be obviously higher than the second temperature value of each indoor unit, so that the target indoor unit is considered to be the indoor unit connected with the target electronic valve, and the target indoor unit is paired with the target electronic expansion valve.
Alternatively, the first temperature average value may be an average value of the second temperature values of the respective indoor units after the target indoor unit is removed.
Illustratively, if the second temperature value of the target indoor unit is 30 ℃, and the second temperature values of the other indoor units are 23 ℃, 21 ℃ and 22 ℃, respectively, the average value of the first temperatures is ((23+21+22)/3) ° c, i.e. 22 ℃.
It should be understood that the average value of the second temperature values of the indoor units after the target indoor unit is removed is taken as the average temperature value, so that the interference of the second temperature value of the target indoor unit can be removed, and at this time, the difference value obtained by subtracting the average value of the temperatures from the second temperature value of the target indoor unit can reflect the temperature difference between the target indoor unit and other indoor units more accurately, so as to improve the detection precision. Similarly, if the difference value obtained by subtracting the first average temperature value from the second temperature value of the target indoor unit is greater than the third temperature threshold value, the temperature of the target indoor unit is considered to be significantly higher than that of other indoor units, so that the target indoor unit is considered to be an indoor unit connected with the target electronic valve, and the target indoor unit is determined to be paired with the target electronic expansion valve.
In some embodiments, in the case that the target indoor unit is determined to be paired with the target electronic expansion valve, the controller changes the address information of the electronic expansion valve corresponding to the target indoor unit in the pairing situation table to the address information of the target electronic expansion valve. Or the controller changes the address information of the indoor unit corresponding to the target electronic expansion valve in the matching condition table into the address information of the target indoor unit. Therefore, the matching condition table of the target indoor unit and the target electronic expansion valve can be updated in time, address error correction is realized, and debugging efficiency is improved.
In some embodiments, when the multi-split air conditioning system starts the pairing detection function, after the multi-split air conditioning system completes pairing detection on a target electronic expansion valve to be detected, it is determined whether an electronic expansion valve which is not subjected to pairing detection still exists. If yes, selecting one electronic expansion valve from the electronic expansion valves which are not detected in a matched mode as the electronic expansion valve detected next time, and repeatedly executing the steps from S101 to S104 until all the electronic expansion valves are detected in a matched mode. Therefore, the pairing condition of each electronic expansion valve and the indoor unit in the multi-split air conditioning system traversal system can be realized, and the address correction can be realized in time when the pairing is wrong, so that the debugging efficiency of the air conditioning system is improved.
In some examples, after the multi-split air conditioning system completes the pairing detection of all the electronic expansion valves, a prompt message for prompting the completion of the pairing detection is sent out.
Alternatively, the multi-split air conditioning system itself may send out a prompt message. For example, the "pairing detection is completed, please restart the air conditioner" may be played in a voice form, or the user may be prompted in the form of beep, signal light flashing, vibration, and the like, which is not limited in the embodiment of the present application.
Optionally, the multi-split air conditioning system may send a prompt message to the terminal device. Illustratively, as shown in fig. 11, the controller 14 of the multi-split air conditioning system issues a prompt message to the terminal device 300, the prompt message is displayed on the terminal device interface in the form of a text popup 305, and the text popup 305 displays "pairing detection is completed |)! "is used for the text message. In addition, when the terminal device displays the prompt information, the user may be prompted in other manners such as text, voice, music, vibration, animation, and the like, which is not limited in this embodiment of the application.
In some embodiments, if a difference value obtained by subtracting the first temperature average value from the second temperature value of the target indoor unit of the multi-split air-conditioning system is less than or equal to a third temperature threshold value, the multi-split air-conditioning system sends a prompt message for prompting that the target electronic valve is not connected with the indoor unit.
It should be understood that, if the difference between the second temperature value of the target indoor unit of the multi-split air-conditioning system and the temperature average value is smaller than or equal to the third temperature threshold, it means that the second temperature value of each indoor unit still has a small difference after the target electronic expansion valve is closed, the second temperature value of each indoor unit is hardly affected by the target electronic expansion valve, and at this time, the target electronic expansion valve is not connected to the indoor unit, so that the multi-split air-conditioning system is controlled to send a prompt message.
For example, the multi-split air conditioning system may be alerted by a voice prompt, e.g., the "Warning! Expansion valve unconnected! ". Further, the multi-split air conditioning system can also stop running when detecting that the electronic expansion valve is not connected, so that the multi-split air conditioning system can be maintained conveniently.
Illustratively, as shown in fig. 12, the controller 14 of the multi-split air conditioning system sends a prompt message to the terminal device 300, the prompt message is displayed on the terminal device interface in the form of a text popup 306, and the text popup 306 displays "warning |)! The expansion valve is not connected! "is displayed. Further, as shown in fig. 13, if the terminal device detects that the user clicks the text popup 306, the terminal device enters a management page 307 of the multi-split air conditioning system. The management page 307 of the multi-split air conditioning system includes a "one-click off" button 308 of the air conditioning system, and when detecting that the user clicks the button 308, the terminal device 300 sends an instruction to the multi-split air conditioning system to turn off the indoor unit, the outdoor unit, and the electronic expansion valve of the multi-split air conditioning system, so as to facilitate timely maintenance.
As shown in fig. 14, an embodiment of the present application provides another control method for a multi-split air conditioning system, including:
s201, starting an outdoor unit, each indoor unit and each electronic expansion valve by a controller of the multi-split air conditioning system so that each indoor unit can operate in a heating mode.
The electronic expansion valve is used for adjusting the supply amount of the refrigerant in the pipeline.
In some embodiments, as shown in fig. 15, step S201 is specifically implemented as the following steps:
s2011, the controller obtains a temperature value of the outdoor unit.
Optionally, the multi-split air conditioning system may acquire a temperature value of the outdoor unit through a second temperature sensor built in the outdoor unit.
And S2012, when the temperature value of the outdoor unit is less than the first temperature threshold value, the controller starts the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode.
In some examples, step S2012 above is specifically implemented as the following steps: starting the outdoor unit and each indoor unit, controlling the compressor to operate at a preset frequency, controlling the fans of each indoor unit to rotate at the same preset frequency, starting the electronic expansion valves, and controlling the electronic expansion valves to operate at the same preset opening degree.
It should be understood that when the temperature value of the outdoor unit is less than the first temperature threshold, the outdoor temperature is lower, and the weather is cooler. On the one hand, when the pairing condition of the indoor units and the electronic expansion valve is detected, the indoor units are controlled to operate in a heating mode, so that the indoor temperature is improved, the energy is fully utilized, and the user experience is improved while the pairing condition is detected. On the other hand, after the electronic expansion valve to be detected is closed subsequently, the temperature of the indoor unit connected with the electronic expansion valve is obviously reduced and is obviously lower than that of other indoor units. Therefore, a proper working mode can be selected according to the environmental temperature so as to reduce the environmental interference and more accurately judge the indoor unit connected with the electronic expansion valve to be detected.
And S202, the controller of the multi-split air conditioning system closes the target electronic expansion valve.
Wherein, the target electronic expansion valve is an electronic expansion valve to be detected.
In some embodiments, step S202 is specifically implemented as: and the controller of the multi-split air-conditioning system closes the target electronic expansion valve, keeps other electronic expansion valves to continuously operate at the same opening degree while closing the target electronic expansion valve, rotates each indoor unit at the same fan frequency, and keeps the outdoor unit of the multi-split air-conditioning system to continuously operate.
In some embodiments, the controller of the multi-split air conditioning system closes the target electronic expansion valve in case that the second preset condition is satisfied. Wherein the second preset condition comprises one or more of:
in condition 1, a difference between a maximum temperature value and a minimum temperature value among third temperature values of the indoor units at a third time is less than or equal to a fourth temperature threshold.
Wherein the third time is before the fourth time.
It should be understood that the closing of the target electronic expansion valve is performed in order to compare the temperature conditions of the respective indoor units after the target electronic expansion valve is closed. Therefore, before the target electronic expansion valve is closed, the indoor units are kept stable at similar temperatures. When the difference between the maximum temperature value and the minimum temperature value in the third temperature values of the indoor units is smaller than or equal to the fourth temperature threshold value, the temperature of each indoor unit is close, the running condition is close, and the indoor units are in a stable working state.
And 2, the duration of the heating mode of the indoor unit reaches a third preset duration.
It should be understood that before the target electronic expansion valve is closed, it should be ensured that each indoor unit maintains a stable state at a similar temperature, so as to compare the temperature conditions of each indoor unit after the target electronic expansion valve is closed. After the air conditioning system runs for a third preset time, each indoor unit is in a stable working state, and the requirements can be considered to be met.
And S203, after a fourth preset time, the controller collects fourth temperature values of the indoor units at a fourth moment, and selects the indoor unit with the maximum fourth temperature value as the target indoor unit.
Wherein the fourth time is after the third time.
In some embodiments, the controller collects a fourth temperature value of each indoor unit at a fourth moment through a first temperature sensor built in each indoor unit.
Illustratively, taking the fourth preset time period as 20 minutes as an example, if 4 indoor units exist in the multi-split air conditioning system, after the target electronic expansion valve is closed for 20 minutes, the fourth temperature values acquired by the controller through the first temperature sensors built in the indoor units are 22 ℃, 21 ℃ and 2 ℃, respectively, and then the indoor unit with the fourth temperature value of 2 ℃ is taken as the target indoor unit.
It is understood that when the target electronic expansion valve is closed, the indoor unit connected to the target electronic expansion valve will have a large difference in temperature from the other indoor units due to the lack of refrigerant. But this temperature difference is not abrupt but gradually develops over time. Therefore, in order to capture the temperature difference, the temperature of each indoor unit should be obtained after the target electronic expansion valve is closed and the air conditioning system is operated for a fourth preset time period. In addition, since the air conditioning system of step S203 is in the heating mode, the indoor unit connected to the target electronic expansion valve will have a significantly reduced heating capacity due to the lack of refrigerant. At this time, the indoor unit with the lowest temperature in the air conditioning system is most likely to be the indoor unit connected with the target electronic expansion valve, so that the indoor unit with the lowest temperature in the air conditioning system is taken as the target indoor unit, and whether the target indoor unit is matched with the target electronic expansion valve or not is further judged.
And S204, if the difference value of the fourth temperature value of the target indoor unit minus the second temperature average value is larger than a fifth temperature threshold value, determining that the target indoor unit is paired with the target electronic expansion valve.
And the second temperature average value is determined according to the fourth temperature value of each indoor unit.
Alternatively, the second temperature average value may be an average value of the fourth temperature values of the respective indoor units.
For example, if the fourth temperature value of the target indoor unit is 0 ℃, and the second temperature values of the other indoor units are 18 ℃, 20 ℃ and 22 ℃, respectively, the average value of the second temperatures is ((0+18+20+22)/4) ° c, i.e. 15 ℃.
It is understood that, after the target electronic expansion valve to be detected is closed, the indoor unit connected to the target electronic expansion valve is lack of refrigerant, and thus the heating effect is reduced. At this time, the temperature value of the indoor unit connected with the target electronic expansion valve is obviously lower than that of other indoor units. And when the average value of the fourth temperature values of the indoor units is taken as the second temperature average value, if the difference value obtained by subtracting the second temperature average value from the fourth temperature value of the target indoor unit is greater than a fifth temperature threshold value, the fourth temperature value of the target indoor unit is considered to be obviously higher than the fourth temperature value of each indoor unit, so that the target indoor unit is considered to be the indoor unit connected with the target electronic valve, and the target indoor unit is paired with the target electronic expansion valve.
Alternatively, the second temperature average value may be an average value of fourth temperature values of the respective indoor units after the target indoor unit is removed.
For example, if the fourth temperature value of the target indoor unit is 0 ℃, the fourth temperature values of the other indoor units are 18 ℃, 20 ℃ and 22 ℃, respectively, the average second temperature value is ((18+20+22)/3) ° c, i.e. 20 ℃.
It should be understood that, by taking the average value of the fourth temperature values of the indoor units after the target indoor unit is removed as the second average temperature value, the interference of the fourth temperature value of the target indoor unit can be removed, and at this time, the difference value obtained by subtracting the average value of the temperatures from the fourth temperature value of the target indoor unit can reflect the temperature difference between the target indoor unit and other indoor units more accurately, so that the detection accuracy is improved. Similarly, if the difference value obtained by subtracting the average temperature value from the fourth temperature value of the target indoor unit is greater than the fifth temperature threshold value, the temperature of the target indoor unit is considered to be significantly lower than that of other indoor units, so that the target indoor unit is considered to be an indoor unit connected with the target electronic valve, and the target indoor unit is determined to be paired with the target electronic expansion valve.
In some embodiments, in the case that the target indoor unit is determined to be paired with the target electronic expansion valve, the controller changes the address information of the electronic expansion valve corresponding to the target indoor unit in the pairing situation table to the address information of the target electronic expansion valve. Or the controller changes the address information of the indoor unit corresponding to the target electronic expansion valve in the matching condition table into the address information of the target indoor unit. Therefore, the matching condition table of the target indoor unit and the target electronic expansion valve can be updated in time, address error correction is realized, and debugging efficiency is improved.
In some embodiments, when the multi-split air conditioning system starts the pairing detection function, after the multi-split air conditioning system completes pairing detection on a target electronic expansion valve to be detected, it is determined whether an electronic expansion valve which is not subjected to pairing detection still exists. If yes, selecting one electronic expansion valve from the electronic expansion valves which are not detected in a matched mode as the electronic expansion valve detected next time, and repeatedly executing the steps S201 to S204 until all the electronic expansion valves are detected in a matched mode. Therefore, the pairing condition of each electronic expansion valve and the indoor unit in the multi-split air conditioning system traversal system can be realized, and the address correction can be realized in time when the pairing is wrong, so that the debugging efficiency of the air conditioning system is improved.
In some examples, after the multi-split air conditioning system completes the pairing detection of all the electronic expansion valves, a prompt message for prompting the completion of the pairing detection is sent out.
Alternatively, the multi-split air conditioning system itself may send out a prompt message. For example, the "pairing detection is completed, please restart the air conditioner" may be played in a voice form, or the user may be prompted in the form of beep, signal light flashing, vibration, and the like, which is not limited in the embodiment of the present application.
Optionally, the multi-split air conditioning system may send a prompt message to the terminal device, for example, the terminal device may prompt the user in other manners such as text, voice, music, vibration, animation, and the like, which is not limited in this embodiment of the present application.
In some embodiments, if a difference value obtained by subtracting the second temperature average value from the fourth temperature value of the target indoor unit of the multi-split air-conditioning system is less than or equal to a fifth temperature threshold value, the multi-split air-conditioning system sends a prompt message for prompting that the target electronic valve is not connected with the indoor unit.
It should be understood that, if the difference between the fourth temperature value of the target indoor unit of the multi-split air-conditioning system and the second temperature average value is less than or equal to the fifth temperature threshold, it means that the fourth temperature value of each indoor unit still has a small difference after the target electronic expansion valve is closed, the fourth temperature value of each indoor unit is hardly affected by the target electronic expansion valve, and the target electronic expansion valve is not connected to the indoor unit at this time, so that the multi-split air-conditioning system is controlled to send a prompt message.
Alternatively, the multi-split air conditioning system itself may send out a prompt message. For example, the multi-split air conditioning system may be alerted by a voice prompt, e.g., the "Warning! Expansion valve unconnected! ". Further, the multi-split air conditioning system can also stop running when detecting that the electronic expansion valve is not connected, so that the multi-split air conditioning system can be conveniently overhauled.
Alternatively, the multi-split air conditioning system sends a prompt message to the terminal device, as shown in fig. 12. The controller 14 of the multi-split air conditioning system sends prompt information to the terminal equipment 300, the prompt information is displayed on the terminal equipment interface in the form of a text popup 306, and the text popup 306 displays "warning! Expansion valve unconnected! "is used for the text message. Further, as shown in fig. 13, if the terminal device detects that the user clicks the text popup 306, the terminal device enters a management page 307 of the multi-split air conditioning system. The management page 307 of the multi-split air conditioning system includes a "one-click off" button 308 of the air conditioning system, and when detecting that the user clicks the button 308, the terminal device 300 sends an instruction to the multi-split air conditioning system to turn off the indoor unit, the outdoor unit, and the electronic expansion valve of the multi-split air conditioning system, so as to facilitate timely maintenance.
It should be understood that the embodiment shown in fig. 9 is an embodiment in which the multi-split air conditioning system completes the pairing detection of the electronic expansion valves in the cooling mode, and the embodiment shown in fig. 14 is an embodiment in which the multi-split air conditioning system completes the pairing detection of the electronic expansion valves in the heating mode.
Alternatively, the controller of the multi-split air conditioning system may perform the pairing detection process when detecting an address correction instruction input by the terminal device.
Alternatively, the controller of the multi-split air conditioning system may execute the process of pairing detection of the electronic expansion valves according to a default time interval. Illustratively, every three days, the multi-split air conditioning system automatically performs the electronic expansion valve pairing detection process shown in fig. 9 or fig. 14.
Optionally, the controller of the multi-split air conditioning system starts a mismatching early warning function, when the air conditioner is in a cooling mode, the matching condition of the electronic expansion valve is detected by default, and when the condition that the electronic expansion valve and the indoor unit are mistakenly matched in the air conditioning system is detected, the matching detection process is executed.
Illustratively, as shown in fig. 16, in a case where the multi-split air conditioning system has the error warning function turned on, the multi-split air conditioning system further performs the following steps:
and Sa1, when the multi-split air conditioning system is in the cooling mode, acquiring temperature values of all indoor units in the on state and temperature values of all indoor units not in the on state.
Sa2, if there is a situation that the temperature value of at least one indoor unit in the non-powered-on state within the fifth preset time period is less than the sixth temperature threshold value, and the temperature value of at least one indoor unit in the powered-on state within the fifth preset time period is greater than the seventh temperature threshold value, sending an alarm message for prompting that there is a pairing error between the indoor unit and the electronic expansion valve.
It should be understood that, when the air conditioning system is in the cooling state, if a temperature value of at least one indoor unit in the non-powered-on state within a fifth preset time period is less than a sixth temperature threshold value, it indicates that the indoor unit in the non-powered-on state is affected by the refrigerant, and an electronic expansion valve connected to the indoor unit in the non-powered-on state is in an open state. At this time, if there is a situation that the temperature value of at least one indoor unit in the on state in the fifth preset time period is greater than a seventh temperature threshold value, the indoor unit in the on state lacks a refrigerant, and an electronic expansion valve connected with the indoor unit in the on state is in a closed state. Therefore, when the air conditioning system has the condition that the address matching of the electronic expansion valve and the indoor unit is wrong, the air conditioning system is controlled to give an alarm to remind a user of closing the air conditioning system or correcting the address in time.
It can be seen that the foregoing describes the solution provided by the embodiments of the present application primarily from a methodological perspective. In order to implement the functions, the embodiments of the present application provide corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiment of the present application, the controller may be divided into the functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The embodiment of the present application further provides a schematic diagram of a hardware structure of a controller, as shown in fig. 17, the controller 2000 includes a processor 2001, and optionally, a memory 2002 and a communication interface 2003 connected to the processor 2001. The processor 2001, memory 2002 and communication interface 2003 are connected by a bus 2004.
The processor 2001 may be a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor 2001 may also be any other means having a processing function such as a circuit, device or software module. The processor 2001 may also include a plurality of CPUs, and the processor 2001 may be one single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).
The memory 2002 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, but is not limited to, electrically erasable programmable read-only memory (EEPROM), compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 2002 may be separate or integrated with the processor 2001. The memory 2002 may include, among other things, computer program code. The processor 2001 is configured to execute the computer program code stored in the memory 2002, thereby implementing the control method provided by the embodiment of the present application.
The bus 2004 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 2004 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 17, but this does not mean only one bus or one type of bus.
Embodiments of the present invention further provide a computer-readable storage medium, which includes computer-executable instructions, and when the computer-executable instructions run on a computer, the computer is caused to execute the method provided by the foregoing embodiments.
The embodiment of the present invention further provides a computer program product, which can be directly loaded into the memory and contains software codes, and after being loaded and executed by the computer, the computer program product can implement the method provided by the above embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A multi-split air conditioning system, comprising:
an outdoor unit;
the system comprises a plurality of indoor units, a control unit and a control unit, wherein an electronic expansion valve is arranged between each indoor unit and the outdoor unit, and each indoor unit comprises a first temperature sensor for detecting the temperature of the indoor unit;
a controller configured to:
starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to run in a refrigeration mode;
closing the target electronic expansion valve;
after a second preset time, collecting a second temperature value of each indoor unit at a second moment, and selecting the indoor unit with the maximum second temperature value as a target indoor unit;
and if the difference value obtained by subtracting the first temperature average value from the second temperature value of the target indoor unit is greater than a third temperature threshold value, determining that the target indoor unit is matched with the target electronic expansion valve, wherein the first temperature average value is determined according to the second temperature value of each indoor unit.
2. A multi-split air conditioning system as claimed in claim 1, wherein the outdoor unit includes a second temperature sensor for sensing an outdoor unit temperature;
the controller is specifically configured to:
acquiring a temperature value of the outdoor unit;
and when the temperature value of the outdoor unit is greater than or equal to a first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a refrigeration mode.
3. A multi-split air conditioning system as set forth in claim 1,
the controller is specifically configured to:
under the condition that a first preset condition is met, closing the target electronic expansion valve;
wherein the first preset condition comprises one or more of the following:
the difference between the maximum temperature value and the minimum temperature value in the first temperature values of the indoor units at a first moment is smaller than a second temperature threshold value, and the first moment is before the second moment; alternatively, the first and second electrodes may be,
the duration of the operation of the indoor unit in the refrigeration mode reaches a first preset duration.
4. The multi-split air conditioning system as claimed in any one of claims 1 to 3, wherein the controller is further configured to:
when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state;
and if the temperature value of at least one indoor unit in the non-started state in a fifth preset time period is less than a sixth temperature threshold value, and the temperature value of at least one indoor unit in the started state in the fifth preset time period is greater than a seventh temperature threshold value, sending alarm information for prompting that the indoor unit and the electronic expansion valve have pairing errors.
5. A multi-split air conditioning system, comprising:
an outdoor unit;
the system comprises a plurality of indoor units, a control unit and a control unit, wherein an electronic expansion valve is arranged between each indoor unit and the outdoor unit, and each indoor unit comprises a first temperature sensor for detecting the temperature of the indoor unit;
a controller configured to:
starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode;
closing the target electronic expansion valve;
after a fourth preset time, collecting fourth temperature values of the indoor units at a fourth moment, and selecting the indoor unit with the maximum fourth temperature value as a target indoor unit;
and if the difference value of the fourth temperature value of the target indoor unit minus the second temperature average value is larger than a fifth temperature threshold value, determining that the target indoor unit is matched with the target electronic expansion valve, wherein the second temperature average value is determined according to the fourth temperature value of each indoor unit.
6. The multi-split air conditioning system as claimed in claim 5, wherein the outdoor unit includes a second temperature sensor for sensing an outdoor unit temperature;
the controller is specifically configured to:
acquiring a temperature value of the outdoor unit;
and when the temperature value of the outdoor unit is smaller than a first temperature threshold value, starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode.
7. A multi-split air conditioning system as set forth in claim 5,
the controller is specifically configured to:
under the condition that a second preset condition is met, closing the target electronic expansion valve;
wherein the second preset condition comprises one or more of:
the difference between the maximum temperature value and the minimum temperature value in third temperature values of all indoor units at a third moment is smaller than or equal to a fourth temperature threshold, and the third moment is before the fourth moment; alternatively, the first and second electrodes may be,
and the duration of the operation heating mode of the indoor unit reaches a third preset duration.
8. The multi-split air conditioning system as claimed in any one of claims 5 to 7, wherein the controller is further configured to:
when the multi-split air conditioning system is in a refrigeration mode, acquiring temperature values of all indoor units in a power-on state and temperature values of all indoor units not in the power-on state;
and if the temperature value of at least one indoor unit in the non-started state in a fifth preset time period is less than a sixth temperature threshold value, and the temperature value of at least one indoor unit in the started state in the fifth preset time period is greater than a seventh temperature threshold value, sending alarm information for prompting that pairing errors exist between the indoor unit and the electronic expansion valve.
9. A control method of a multi-split air conditioning system, the method comprising:
starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to run in a refrigeration mode;
closing the target electronic expansion valve;
after a second preset time, collecting a second temperature value of each indoor unit at a second moment, and selecting the indoor unit with the maximum second temperature value as a target indoor unit;
and if the difference value obtained by subtracting the first temperature average value from the second temperature value of the target indoor unit is larger than a third temperature threshold value, determining that the target indoor unit is matched with the target electronic expansion valve, wherein the first temperature average value is determined according to the second temperature value of each indoor unit.
10. A control method of a multi-split air conditioning system, the method comprising:
starting the outdoor unit, each indoor unit and each electronic expansion valve to enable each indoor unit to operate in a heating mode;
closing the target electronic expansion valve;
after a fourth preset time, collecting fourth temperature values of the indoor units at a fourth moment, and selecting the indoor unit with the maximum fourth temperature value as a target indoor unit;
and if the difference value of the fourth temperature value of the target indoor unit minus the second temperature average value is larger than a fifth temperature threshold value, determining that the target indoor unit is matched with the target electronic expansion valve, wherein the second temperature average value is determined according to the fourth temperature value of each indoor unit.
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| CN117091206A (en) | 2023-11-21 |
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