CN113124548B - Multi-split air conditioning system - Google Patents

Multi-split air conditioning system Download PDF

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Publication number
CN113124548B
CN113124548B CN202110396263.9A CN202110396263A CN113124548B CN 113124548 B CN113124548 B CN 113124548B CN 202110396263 A CN202110396263 A CN 202110396263A CN 113124548 B CN113124548 B CN 113124548B
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control module
indoor
unit
temperature
module
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CN113124548A (en
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都学敏
朱海滨
颜鹏
田薇
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F24F2120/12—Position of occupants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses a multi-split air conditioning system, comprising: the outdoor unit module is provided with a temperature acquisition unit for acquiring outdoor temperature T; an indoor unit module provided with a sensor unit for identifying the number of people in a room; the control module is used for calculating the opening capacity of the indoor unit module according to the information acquired by the temperature acquisition unit and the sensor unit; the control module is used for setting indoor set temperature T0; the control module is also used for setting a parameter A, and the parameter A is used for correcting the opening capacity of the indoor unit module. According to the invention, through data information acquired by the temperature acquisition unit, the control module determines the number of indoor units allowed to operate by calculation; in addition, the free switching operation among the appointed indoor units can be realized according to the sensor unit for identifying the number of people; the comfort of the local area can be preferentially ensured. Compared with the traditional scheme, the invention can reduce the capacity of the outdoor unit, thereby reducing the initial investment of the household air conditioner.

Description

Multi-split air conditioning system
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioning system.
Background
At present, an air conditioning scheme of one-to-four or one-to-five or even one-to-six is generally adopted in residential buildings with large residential areas, and the investment of the air conditioner at the initial stage is large. And because people's energy-conserving consciousness is stronger now, the probability of opening all indoor sets simultaneously is very little, so if select outdoor set capacity according to the sum of indoor set capacity completely, can cause the outdoor set most of time all to be in the underload operation. In addition, in extreme outdoor weather, the capacity of the outdoor unit of the air conditioner is attenuated, and the more indoor units are turned on, the less cooling capacity or heat is distributed to each indoor unit, so that the heating or cooling speed is slower, and even the set temperature is not reached.
In summary, a multi-split air conditioning system needs to be designed to solve the problem of resource waste and the like caused by low load rate in the multi-split system in the prior art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a multi-split air conditioning system which can give out the number of corresponding indoor units allowed to be started according to indoor set temperature, outdoor temperature and different distribution ratios, and can ensure the comfort of local areas under extreme working conditions while realizing energy conservation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-split air conditioning system comprising:
the outdoor unit module is provided with a temperature acquisition unit for acquiring outdoor temperature T;
the indoor unit module is provided with a sensor unit for identifying the number of people in a room;
the control module is used for calculating the opening capacity of the indoor unit module according to the information acquired by the temperature acquisition unit and the sensor unit;
the control module is used for setting indoor set temperature T0; the control module is also used for setting a parameter A, and the parameter A is used for correcting the opening capacity of the indoor unit module.
In some embodiments of the present invention, when the sum of the capacities of the indoor unit modules that are turned on is greater than half of the proportioning ratio, the control module introduces a parameter a for calculating the capacity of the indoor unit module that needs to be turned on.
In some embodiments of the invention, there are several threshold ranges of outdoor temperature within the control module; the control module is also provided with a plurality of threshold ranges of the matching ratio N.
In some embodiments of the present invention, in the cooling mode, when the outdoor temperature T increases, the control module turns on the indoor unit with a capacity decrease.
In some embodiments of the present invention, in the heating mode, when the outdoor temperature T decreases, the control module turns on the capacity reduction of the indoor unit.
In some embodiments of the present invention, in the cooling mode, when the indoor set temperature T0 is less than a threshold, the control module sets a parameter a to regulate and control the capacity of the indoor unit; in the heating mode, when the indoor set temperature T0 is greater than a threshold, the control module setting parameter a regulates and controls the capacity of the indoor unit.
In some embodiments of the present invention, when the outdoor temperature T is within the same threshold range, the control module turns on the capacity increase of the indoor unit as the proportion ratio N decreases.
In some embodiments of the invention, the proportion of references to the parameter a by the control module decreases as the proportioning ratio N decreases when the outdoor temperature T lies within the same threshold range.
In some embodiments of the present invention, a display unit or a voice unit is disposed in the indoor unit module for prompting an opening state of the indoor unit module.
In some embodiments of the present invention, the ratio N range of the indoor unit to the outdoor unit is: 50 to 200 percent.
Compared with the prior art, the technical scheme of the invention has the following technical effects:
according to the invention, through data information acquired by the temperature acquisition unit, the control module determines the number of indoor units allowed to operate by calculation; in addition, the free switching operation among the appointed indoor units can be realized according to the sensor unit for identifying the number of people; the comfort of the local area can be preferentially ensured. Compared with the traditional scheme, the invention can reduce the capacity of the outdoor unit, thereby reducing the initial investment of the household air conditioner.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a control flowchart of the multi-split air conditioning system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
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 invention, "a plurality" means two or more unless otherwise specified.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator in the present application. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
A multi-split air conditioning system comprising:
the outdoor unit module is provided with a temperature acquisition unit for acquiring outdoor temperature T;
the indoor unit module is provided with a sensor unit for identifying the number of people in a room;
the control module is used for calculating the opening capacity of the indoor unit module according to the information acquired by the temperature acquisition unit and the sensor unit;
the control module is used for setting indoor set temperature T0; the control module is also used for setting a parameter A, and the parameter A is used for correcting the opening capacity of the indoor unit module.
In some embodiments of the invention, the control module includes a cooling mode and a heating mode; when the control module receives that the outdoor temperature T is T more than or equal to T H When the control module is in the refrigeration mode, the control module enters the refrigeration mode; generally T H At 25 ℃, when the control module receives that the outdoor temperature T is T less than or equal to T L When the control module enters a heating mode, generally T L It was 15 ℃.
In addition, when the outdoor temperature T is in the range of T L <T<T H In the time, the control module recognizes the transition season, the user can select the cooling or heating mode according to the self requirement, and the quantity and the capacity of the indoor unit modules are not limited. The temperature involved in this embodiment is only used as an example, and because of differences in regions and differences in temperature among people, the temperature of the determination node may be customized in the control module by a user, which provides greater selectivity for the user.
In some embodiments of the present invention, each outdoor unit module generally drags 3 or more indoor unit modules; each indoor unit module is provided with a sensor unit for identifying the number of people in a room, and the sensor unit is also used for detecting whether people exist in the room or not.
In some embodiments of the invention, the threshold range for the outdoor temperature T comprises 5, in particular from T H1 To T H6 There are five threshold ranges: first temperature threshold range: t is a unit of H1 ≤T≤T H2 (ii) a Second temperature threshold range: t is H2 <T≤T H3 (ii) a Third temperature threshold range: t is H3 <T≤T H4 (ii) a Fourth temperature threshold range: t is a unit of H4 <T≤T H5 (ii) a Fifth temperature threshold range: t is a unit of H5 <T≤T H6 。
For example, there are five threshold ranges from 25 ℃ to 52 ℃: first temperature threshold range: t is more than or equal to 25 ℃ and less than or equal to 30 ℃; second temperature threshold range: t is more than 30 ℃ and less than or equal to 35 ℃; third temperature threshold range: t is less than 35 ℃ and less than or equal to 43 ℃; fourth temperature threshold range: t is more than 43 ℃ and less than or equal to 48 ℃; fifth temperature threshold range: t is less than or equal to 52 ℃ at 48 ℃.
In some embodiments of the invention, the threshold ranges for the matching ratio N comprise 4, in particular divided from 50% to 200% into four threshold ranges: first match rate threshold range: n is more than or equal to 50 percent and less than 100 percent; second match ratio threshold range: n is more than or equal to 100% and less than 130%; third match ratio threshold range: n is more than or equal to 130% and less than 160%; fourth match rate threshold range: n is more than or equal to 160 percent and less than 200 percent.
In the cooling mode, when the outdoor temperature T is increased, the control module starts the capacity reduction of the indoor unit. When the indoor set temperature T0 is smaller than a threshold value, the control module sets a parameter A to regulate and control the capacity of the indoor unit;
in this embodiment, the threshold may be 26 ℃, and in the cooling mode, the threshold is set to be relatively higher, so that the load of the outdoor unit can be relatively reduced. That is, when the indoor set temperature T0 is more than or equal to 26 ℃, the control module judges the threshold range in which the indoor set temperature T falls according to the collected outdoor temperature T, and then controls the capacity of the indoor unit module according to the threshold range in which the distribution ratio N falls. The following data can be specifically referred to for regulation and control:
for the case that the proportion ratio N is within the first proportion ratio threshold range, the control module can control the capacity of the indoor unit module to be in a full-open state no matter the outdoor temperature T is within any temperature threshold range. Since the minimum number of indoor units allowed to operate is 1.
When the outdoor temperature T is within the first temperature threshold range, and the distribution ratio N is within the second distribution ratio threshold range, the third distribution ratio threshold range and the fourth distribution ratio threshold range, the sum of the capacities of the indoor unit modules started by the control module is less than or equal to N x 100%.
When the outdoor temperature T is in other temperature threshold value ranges, the proportion of the sum of the capacities of the indoor unit modules in the distribution ratio N is reduced along with the increase of the distribution ratio N, so that when the outdoor temperature T is in the same temperature threshold value range, the sum of the capacities of the indoor unit modules (the sum of the capacities in the table is short for short, and the same is used below) which can be started by the control module is equal under the condition of different distribution ratios N.
When the matching rate N is within the same matching rate threshold range, along with the increase of the outdoor temperature T, namely when the external environment is gradually severe, the capacity of the indoor unit module started by the control module is gradually reduced, and the local environmental comfort can be preferentially ensured. The specific control method can be referred to the following table:
Figure GDA0003744588960000061
in some embodiments of the present invention, when the indoor set temperature T0 is less than 26 ℃, the control module introduces parameter a to precisely control the capacity of the indoor unit module to be turned on.
Similarly, for the case where the distribution ratio N is within the first distribution ratio threshold range, the control module can control the indoor unit module capacity to be in the fully open state regardless of whether the outdoor temperature T is within any temperature threshold range. Since the minimum number of indoor units allowed to operate is 1.
When the outdoor temperature T is within the same temperature threshold range, the proportion of the control module to the parameter a reference gradually increases as the proportion N increases.
For the reference of the parameter A, the control module introduces the parameter A to carry out fine adjustment on the sum of the capacities of the started indoor unit modules. The control is specifically made in accordance with the following table:
Figure GDA0003744588960000071
in some embodiments of the present invention, when the outdoor temperature T ≧ T H4 When the control module is used, the indoor unit of the living room can be appointed to be started or two bedrooms can be appointed to be started, and the indoor unit and the bedrooms can be automatically switched to be started according to the existence of people.
That is, when the outdoor temperature T ≧ T H4 At this time, as shown in fig. 1, the control module starts receiving the collected information of the sensor unit for recognizing the number of persons in the room. When the sensor unit detects that a person exists in the living room and no person exists in the bedroom, the control module only controls the indoor unit module of the living room to be started; if no person is detected in the living room within N continuous minutes (such as 15 minutes) in the control state, the indoor unit module of the living room controlled by the control module is closed.
When the sensor unit detects that a person is in the bedroom and no person is in the living room, the control module only controls to start the bedroom indoor unit module corresponding to the person; if no person is detected in the bedroom within N continuous minutes (such as 15 minutes), the control module controls to close the corresponding indoor unit module of the bedroom without the person.
And the indoor unit module is internally provided with a display unit or a voice unit for prompting the opening state of the indoor unit module. That is, when the sensor unit detects that both the living room and the bedroom have a person, the control module selects to only start the indoor unit module of the living room, and then the indoor unit module of the bedroom is reminded by using the display unit or the voice unit: and opening an indoor unit module of the living room.
In some embodiments of the present invention, in the heating mode, when the outdoor temperature T decreases, the control module turns on a capacity decrease of the indoor unit. In the heating mode, when the indoor set temperature T0 is greater than a threshold, the control module setting parameter a regulates and controls the capacity of the indoor unit.
In some embodiments of the present invention, the threshold range for the outdoor temperature T includes 5, unlike the temperature threshold range of the cooling mode. In particular from T L1 To T L6 There are five threshold ranges: first temperature threshold range: t is L2 ≤T≤T L1 (ii) a Second temperature threshold range: t is a unit of L3 <T≤T L2 (ii) a Third temperature threshold range: t is L4 <T≤T L3 (ii) a Fourth temperature threshold range: t is L5 <T≤T L4 (ii) a Fifth temperature threshold range: t is L6 <T≤T L5 。
For example, five threshold ranges are divided from 15 ℃ to-25 ℃: first temperature threshold range: t is more than 12 ℃ and less than or equal to 15 ℃; second temperature threshold range: t is less than 7 ℃ and less than or equal to 12 ℃; third temperature threshold range: t is more than 0 ℃ and less than or equal to 7 ℃; fourth temperature threshold range: -10 ℃ < T.ltoreq.0 ℃; fifth temperature threshold range: -25 ℃ and < T ≦ 10 ℃. The threshold range of the ratio is the same as that in the cooling mode, and therefore, the description thereof is omitted.
In this embodiment, the threshold may be 22 ℃, and in the heating mode, the threshold is set relatively low, so that the load of the outdoor unit can be relatively reduced. That is, when the indoor set temperature T0 is less than or equal to 22 ℃, the control module determines the threshold range in which the indoor set temperature T falls according to the collected outdoor temperature T, and controls the capacity of the indoor unit module according to the threshold range in which the proportion N falls. The following data can be specifically referred to for regulation and control:
and for the condition that the distribution ratio N is within the first distribution ratio threshold range, the control module can control the capacity of the indoor unit module to be in a full-open state no matter the outdoor temperature T is within any temperature threshold range. Since the minimum number of indoor units allowed to operate is 1.
When the outdoor temperature T is within the first temperature threshold range, and the distribution ratio N is within the second distribution ratio threshold range, the third distribution ratio threshold range and the fourth distribution ratio threshold range, the sum of the capacities of the indoor unit modules started by the control module is less than or equal to N x 100%.
When the outdoor temperature T is within other temperature threshold value ranges, the proportion of the sum of the capacities of the indoor unit modules in the proportion N is reduced along with the increase of the proportion N, so that when the outdoor temperature T is within the same temperature threshold value range, under the condition of different proportions N, the sum of the capacities of the indoor unit modules which can be started by the control module is equal.
When the matching rate N is within the same matching rate threshold range, along with the increase of the outdoor temperature T, namely when the external environment is gradually severe, the capacity of the indoor unit module started by the control module is gradually reduced, and the local environmental comfort can be preferentially ensured. The specific control method can be referred to the following table:
Figure GDA0003744588960000091
in the embodiment, when the indoor set temperature T0 is greater than 22 ℃, the control module introduces the parameter A to accurately control and start the capacity of the indoor unit module.
Similarly, for the case where the distribution ratio N is within the first distribution ratio threshold range, the control module can control the indoor unit module capacity to be in the fully open state regardless of whether the outdoor temperature T is within any temperature threshold range. Since the minimum number of indoor units allowed to operate is 1.
When the outdoor temperature T is within the same temperature threshold range, the proportion referenced by the control module for the parameter a increases gradually as the proportioning ratio N increases.
For the reference of the parameter A, the control module introduces the parameter A to carry out fine adjustment on the sum of the capacities of the started indoor unit modules. The control is specifically made in the following table:
Figure GDA0003744588960000101
in some embodiments of the present invention, when the outdoor temperature T ≦ T L5 When the control module is used, the indoor unit of the living room can be appointed to be started or two bedrooms can be appointed to be started, and the indoor unit and the bedrooms can be automatically switched to be started according to the existence of people.
That is, when the outdoor temperature T is less than or equal to T L5 At this time, as shown in fig. 1, the control module starts receiving the collected information of the sensor unit for recognizing the number of persons in the room. When the sensor unit detects that a person exists in the living room and no person exists in the bedroom, the control module only controls the indoor unit module of the living room to be started; if no person is detected in the living room within N continuous minutes (such as 15 minutes) in the control state, the indoor unit module of the living room controlled by the control module is closed.
When the sensor unit detects that a person is in the bedroom and no person is in the living room, the control module only controls to start the bedroom indoor unit module corresponding to the person; if no person is detected in the bedroom for N minutes (such as 15 minutes), the control module controls to close the corresponding indoor unit module of the bedroom without the person.
And the indoor unit module is internally provided with a display unit or a voice unit for prompting the opening state of the indoor unit module. That is, when the sensor unit detects that both the living room and the bedroom have a person, the control module selects to only start the indoor unit module of the living room, and then the indoor unit module of the bedroom is reminded by using the display unit or the voice unit: and opening an indoor unit module of the living room.
Compared with the prior art, the technical scheme of the invention has the following technical effects:
according to the invention, through data information acquired by the temperature acquisition unit, the control module determines the number of indoor units allowed to operate by calculation; in addition, the free switching operation among the appointed indoor units can be realized according to the sensor unit for identifying the number of people; the comfort of the local area can be preferentially ensured. Compared with the traditional scheme, the invention can reduce the capacity of the outdoor unit, thereby reducing the initial investment of the household air conditioner.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. The multi-split air conditioning system is characterized by comprising:
the outdoor unit module is provided with a temperature acquisition unit for acquiring outdoor temperature T;
the indoor unit module is provided with a sensor unit for identifying the number of people in a room;
the control module is used for calculating the opening capacity of the indoor unit module according to the information acquired by the temperature acquisition unit and the sensor unit;
the control module is used for setting indoor set temperature T0; the control module is also used for setting a parameter A, and the parameter A is used for correcting the opening capacity of the indoor unit module;
a plurality of threshold ranges of outdoor temperature are arranged in the control module; the control module is also provided with a plurality of threshold ranges of the matching ratio N;
in a cooling mode, when the indoor set temperature T0 is smaller than a threshold, the control module introduces a parameter a to regulate and control the capacity of the indoor unit, and when the outdoor temperature T is within the same threshold range, the proportion of the parameter a introduced by the control module decreases with the decrease of the proportion N.
2. The multi-split air conditioning system as claimed in claim 1, wherein the control module turns on a capacity reduction of the indoor unit when the outdoor temperature T is increased in a cooling mode when the distribution ratio N is equal to or greater than 100%.
3. A multi-split air conditioning system as claimed in claim 1, wherein, when the distribution ratio N is equal to or greater than 100%, the capacity of the control module turning on the indoor units is decreased when the outdoor temperature T is decreased in the heating mode.
4. The multi-split air conditioning system as claimed in claim 1, wherein in a cooling mode, when an indoor set temperature T0 is less than a threshold value, the control module turns on a capacity increase of the indoor unit as the split ratio N is decreased when the outdoor temperature T is within a same threshold range.
5. The multi-split air conditioning system as claimed in claim 1, wherein a display unit or a voice unit is provided in the indoor unit module for prompting an on state of the indoor unit module.
6. A multi-split air conditioning system as claimed in claim 1, wherein a ratio N of the indoor units to the outdoor units ranges from: 50 to 200 percent.
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JP2008170074A (en) * 2007-01-12 2008-07-24 Fujitsu General Ltd Electronic apparatus provided with sensor circuit
CN102538144B (en) * 2012-02-14 2014-04-16 美的集团股份有限公司 Multi-connected air-conditioning unit control method
CN105066287A (en) * 2015-07-20 2015-11-18 特灵空调系统(中国)有限公司 Multi-split air conditioner and control method thereof
CN105972760B (en) * 2016-05-23 2018-11-27 珠海格力电器股份有限公司 Central air-conditioner control method and device
CN109489210B (en) * 2018-10-15 2020-12-29 珠海格力电器股份有限公司 Oil return control method and device for multi-split air conditioning system, oil return control equipment and air conditioner
CN110081554B (en) * 2019-05-07 2020-12-25 珠海格力电器股份有限公司 Control method and device of multi-split air conditioning system
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