CN104896581B - The control method of air conditioner and air conditioner - Google Patents

The control method of air conditioner and air conditioner Download PDF

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Publication number
CN104896581B
CN104896581B CN201510212138.2A CN201510212138A CN104896581B CN 104896581 B CN104896581 B CN 104896581B CN 201510212138 A CN201510212138 A CN 201510212138A CN 104896581 B CN104896581 B CN 104896581B
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CN
China
Prior art keywords
heat exchanger
interface
air conditioner
outdoor heat
temperature
Prior art date
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CN201510212138.2A
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Chinese (zh)
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CN104896581A (en
Inventor
韩宇
李金波
陈明瑜
宋超锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201510212138.2A priority Critical patent/CN104896581B/en
Publication of CN104896581A publication Critical patent/CN104896581A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08Compressors specially adapted for separate outdoor units
    • F24F1/10Arrangement or mounting thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14Heat exchangers specially adapted for separate outdoor units
    • F24F1/16Arrangement or mounting thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/37Capillary tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

Abstract

The invention discloses the control method of air conditioner and air conditioner.Air conditioner includes:Compressor, compressor have exhaust outlet and gas returning port;First commutation component, first commutation component has the first valve port to the 4th valve port, and one of connection in the first valve port and the second valve port and the 3rd valve port, the 4th valve port connects with another in the second valve port and the 3rd valve port, first valve port is connected with exhaust outlet, and the 4th valve port is connected with gas returning port;Second commutation component, the second commutation component have first interface to the 3rd interface, and first interface connects with one of in second interface and the 3rd interface, and first interface is connected with the second valve port;Indoor heat exchanger, the first end of indoor heat exchanger are connected with the 3rd valve port;3rd commutation component;First outdoor heat exchanger and the second outdoor heat exchanger;First refrigerant flow and the second refrigerant flow.The air conditioner of the present invention, comfortableness of user when using air conditioner heat-production function can be improved to a certain extent.

Description

The control method of air conditioner and air conditioner
Technical field
The present invention relates to art of refrigeration units, more particularly, to the control method of a kind of air conditioner and air conditioner.
Background technology
When winter uses air conditioner heat-production, the phenomenon of frosting occurs due to low temperature in the air-conditioner outdoor unit of air conditioner.It is existing Pointed out in technology, the defrosting to air-conditioner outdoor unit is typically after air conditioner runs a period of time, by the heating mode of air conditioner Switch to refrigeration mode, indoor heat exchanger is as the heat in evaporator absorption chamber, and outdoor heat exchanger is as condenser with to sky Outdoor unit radiating is adjusted, so as to realize defrosting, however, the Defrost technology of heat has had a strong impact on that user's is comfortable in this absorption chamber Property.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention carries Go out a kind of air conditioner, the air conditioner can improve the comfortableness of user.
The present invention also proposes a kind of control method of air conditioner, for controlling above-mentioned air conditioner.
According to the air conditioner of the present invention, including:Compressor, the compressor have exhaust outlet and gas returning port;First commutation Component, the first commutation component have the first valve port to the 4th valve port, first valve port and the second valve port and the 3rd valve port In one of connection, the 4th valve port connects with another in second valve port and the 3rd valve port, described First valve port is connected with the exhaust outlet, and the 4th valve port is connected with the gas returning port;Second commutation component, described second changes There is first interface to the 3rd interface, the first interface and one of them in second interface and the 3rd interface to component Connection, the first interface are connected with second valve port;Indoor heat exchanger, the first end of the indoor heat exchanger and described the Three valve ports are connected;3rd commutation component, the 3rd commutation component have the 4th to be interfaced to the 6th interface, the 4th interface with 5th interface connects with one of in the 6th interface, the second end of the 4th interface and the indoor heat exchanger it Between be connected with the first throttle element and the first controller being connected in parallel;First outdoor heat exchanger and the second outdoor heat exchanger, institute The first end for stating the first outdoor heat exchanger is connected with the second interface, the first end of second outdoor heat exchanger and described the Five interfaces are connected, and are connected with simultaneously between the second end of the second end of first outdoor heat exchanger and second outdoor heat exchanger Join the second restricting element and second controller of connection;First refrigerant flow and the second refrigerant flow, first refrigerant flow One end be connected with the 3rd interface, the other end of second refrigerant flow is connected to second outdoor heat exchanger and institute Between stating the 5th interface, one end of second refrigerant flow is connected with the 6th interface, second refrigerant flow it is another One end is connected between first outdoor heat exchanger and the second interface.
According to the air conditioner of the present invention, by setting the first outdoor heat exchanger and the second outdoor heat exchange in air-conditioner outdoor unit Device, and the second restricting element and second controller are connected in parallel between the first outdoor heat exchanger and the second outdoor heat exchanger, together When the second commutation component and the 3rd commutation component are set, and the first refrigerant flow and the second refrigerant flow, this can make interior Heat exchanger continues in the first outdoor heat exchanger and the second outdoor heat exchanger defrost to indoor heating, so as to carry to a certain extent Comfortableness of high user when using air conditioner heat-production function.
According to some embodiments of the present invention, the second commutation component is two-bit triplet magnetic valve.
In some embodiments of the invention, the 3rd commutation component is two-bit triplet magnetic valve.
According to some embodiments of the present invention, the first commutation component is four-way valve.
According to some embodiments of the present invention, first controller is configured to be in normally off.
In some embodiments of the invention, the second controller is configured to be in normally open.
According to some embodiments of the present invention, the first throttle element is capillary or electric expansion valve, described second Restricting element is capillary or electric expansion valve.
In some embodiments of the invention, first outdoor heat exchanger and second outdoor heat exchanger are two only Vertical heat exchange element, or two that first outdoor heat exchanger and second outdoor heat exchanger are a heat exchange element Point.
The control method of air conditioner according to embodiments of the present invention, the air conditioner are above-mentioned air conditioner, the control Method is as follows:
When following either condition meets, the air conditioner is controlled to enter the first self-circulating defrosting pattern, described first Self-circulating defrosting pattern, second controller are closed, the first outdoor heat exchanger are defrosted:
Condition one, after compressor accumulative operation t1 minutes, the first temperature T1 is less than first predetermined value T11, and first is warm Degree T1 and the first predetermined difference value BT1 sums are less than or equal to T10, and the 3rd temperature T3 > third predetermined value T33, wherein the first temperature The temperature that T1 is the first outdoor heat exchanger is spent, second temperature T2 is the temperature of the second outdoor heat exchanger, and the 3rd temperature T3 is air-conditioning Environment temperature in device outdoor unit, the T10 are that air conditioner heat-production runs and arrives m2 after compressor start continuous service m1 minutes The minimum value of T1 in minute;
Condition two, after compressor accumulative operation t2 minutes, the first temperature T1 is less than the 4th predetermined value T12, the 3rd temperature The predetermined value T34 of T3 > the 5th, and continue m3 minutes;
Condition three, after compressor accumulative operation t3 minutes, the first temperature T1 is less than the 6th predetermined value T13, the 3rd temperature The predetermined value T35 of T3 > the 7th;
When following either condition meets, the air conditioner is controlled to enter the second self-circulating defrosting pattern, described second Self-circulating defrosting pattern, second controller are closed, the second outdoor heat exchanger are defrosted:
Condition four, after compressor accumulative operation t4 minutes, second temperature T2 is less than the first setting value T21, and second is warm The settings of degree T2 and second difference BT2 sums are less than or equal to T20, and the setting value T331 of the 3rd temperature T3 > the 3rd, wherein described T20 is that air conditioner heat-production is run and after compressor start continuous service m1 minutes to the minimum value of the T2 in m2 minutes;
Condition five, after compressor accumulative operation t5 minutes, second temperature T2 is less than the 4th setting value T22, the 3rd temperature The setting value T341 of T3 > the 5th, and continue m31 minutes;
Condition six, after compressor accumulative operation t6 minutes, second temperature T2 is less than the 6th setting value T23, the 3rd temperature The setting value T351 of T3 > the 7th;
Wherein when meeting to enter the first self-circulating defrosting pattern and the second self-circulating defrosting pattern simultaneously, the is initially entered One self-circulating defrosting pattern, after enter back into the second self-circulating defrosting pattern.
The first self-circulating defrosting pattern is run in air conditioner or during the second self-circulating defrosting pattern, when detecting that satisfaction exits During condition, defrost is exited.
According to the control method of the air conditioner of the present invention, during the defrost of air conditioner, indoor heat exchanger can be held Continue to indoor radiating, so as to ensure that the lasting heating of indoor set during defrost, this improves user and existed to a certain extent Using comfortableness during air conditioner heat-production function, while by detecting the temperature of the first outdoor heat exchanger and the second outdoor heat exchanger Degree, and by it compared with predetermined value to determine whether to be defrosted, can be defrosted according to actual conditions, avoid air-conditioning Device is defrosted in frostless situation and wastes energy, realizes the purpose of frost defrosting.
According to some embodiments of the present invention, in the first self-circulating defrosting pattern, the exit criteria is:Detect T1 Higher than the first set temperature value, detect T1 higher than the second set temperature value and continue first scheduled time or detection to described The time that first outdoor heat exchanger is defrosted is more than the first setting time, wherein first set temperature value is more than described the Two set temperature values;When being defrosted to second outdoor heat exchanger, the exit criteria is:Detect T2 higher than the 3rd setting Temperature value, T2 is detected higher than the 4th set temperature value and continues second scheduled time or detection to second outdoor heat exchange The time that device is defrosted is more than the second setting time, wherein the 3rd set temperature value is more than the 4th design temperature Value.
Brief description of the drawings
Fig. 1 is that the refrigerant of air conditioner according to embodiments of the present invention in kind of refrigeration cycle flows to schematic diagram;
Fig. 2 is that air conditioner according to embodiments of the present invention flows to schematic diagram in the refrigerant of heating circulation;
Refrigerant when Fig. 3 is the first outdoor heat exchanger defrosting of air conditioner according to embodiments of the present invention flows to schematic diagram;
Refrigerant when Fig. 4 is the second outdoor heat exchanger defrosting of air conditioner according to embodiments of the present invention flows to schematic diagram;
Control flow schematic diagram when Fig. 5 is the first outdoor heat exchanger defrosting of air conditioner according to embodiments of the present invention;
Control flow schematic diagram when Fig. 6 is the second outdoor heat exchanger defrosting of air conditioner according to embodiments of the present invention.
Reference:
Air conditioner 100;
Compressor 1;Exhaust outlet A;Gas returning port B;
First commutation component 2;First valve port C;Second valve port D;3rd valve port E;4th valve port F;
Second commutation component 3;First interface G;Second interface H;3rd interface I;
Indoor heat exchanger 4;
3rd commutation component 5;4th interface J;5th interface K;6th interface L;
First throttle element 6;
First controller 7;
First outdoor heat exchanger 8;
Second outdoor heat exchanger 9;
Second restricting element 10;
Second controller 11;
First refrigerant flow 12;
Second refrigerant flow 13.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to The embodiment of accompanying drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally;Can be that machinery connects Connect or electrically connect or can communicate each other;Can be joined directly together, can also be indirectly connected by intermediary, can be with It is connection or the interaction relationship of two elements of two element internals, is limited unless otherwise clear and definite.For this area For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Below with reference to the accompanying drawings air conditioner 100 according to embodiments of the present invention is described, can be used for adjusting indoor temperature.
As Figure 1-Figure 4, air conditioner 100 according to embodiments of the present invention can include the commutation component of compressor 1, first 2nd, the second commutation component 3, indoor heat exchanger 4, the 3rd commutation component 5, the first outdoor heat exchanger 8, the second outdoor heat exchanger 9, the One refrigerant flow 12 and the second refrigerant flow 13.
Specifically, compressor 1 has exhaust outlet A and gas returning port B, and refrigerant is entered inside compressor 1 from gas returning port B, warp Compressor 1 forms the refrigerant of HTHP after compressing, discharged from exhaust outlet A.
First commutation component 2 has the first valve port C to the 4th valve port F, wherein, the first valve port C and the second valve port D and the 3rd One of connection in valve port E, the 4th valve port F connect with another in the second valve port D and the 3rd valve port E, in other words, when When first valve port C connects with the second valve port D, the 4th valve port F connects with the 3rd valve port E.When the first valve port C and the 3rd valve port E connects When logical, the 4th valve port F connects with the second valve port D.In addition, the first valve port C is connected with exhaust outlet A, the 4th valve port F and gas returning port B It is connected.
Preferably, the first commutation component 2 is four-way valve, when the first commutation component 2 powers off, the first valve port C and the second valve Mouth D connections, the 4th valve port F connect with the 3rd valve port E, and when the first commutation component 2 is powered, the first valve port C and the 3rd valve port E connect Logical, the 4th valve port F connects with the second valve port D.But it is understood that the first commutation component 2 can be formed as other elements, As long as there is the first valve port C to the 4th valve port F and commutation can be realized.
Because the first valve port C of the first commutation component 2 can connect with one of in the second valve port D and the 3rd valve port E To realize commutation, the 4th valve port F is connected with another in the second valve port D and the 3rd valve port E to realize commutation, and this causes air-conditioning Device 100 can be changed between refrigeration mode and heating mode, it is achieved thereby that the refrigerating function of air conditioner 100 and heating work( Energy.
As Figure 1-Figure 4, the second commutation component 3 has a first interface G to the 3rd interface I, wherein first interface G and the One of connection in two interface H and the 3rd interface I, first interface G are connected with the second valve port D.Connect that is, working as first When mouth G connects with second interface H, first interface G does not connect with the 3rd interface I.When first interface G connects with the 3rd interface I, First interface G does not connect with second interface H.
Preferably, the second commutation component 3 is three-way magnetic valve, when the second commutation component 3 powers off, the one of first interface G End connects with the second valve port D, and the other end connects with second interface H, without being connected with the 3rd interface I, when the second commutation component 3 is logical When electric, first interface G one end connects with the second valve port D, and the other end connects with the 3rd interface I, without connecting with second interface H It is logical, by way of the coil electricity in three-way magnetic valve or power-off, realize the commutation of three-way magnetic valve.
The first end of indoor heat exchanger 4 is connected with the 3rd valve port E, and the refrigerant in coolant loop can flow from indoor heat exchanger 4 To the 3rd valve port E, also indoor heat exchanger 4 can be flowed to from the 3rd valve port E certainly.
3rd commutation component 5 has the 4th interface J to the 6th interface L, the 4th interface J and the 5th interface K and the 6th interface L In one of connection, in other words, when the 4th interface J connects with the 5th interface K, the 4th interface J not with the 6th interface L connect Logical, when the 4th interface J connects with the 6th interface L, the 4th interface J does not connect with the 5th interface K, so as to realize the in this way The commutation of three commutation components 5.
The first throttle element 6 and first being connected in parallel is connected between 4th interface J and the second end of indoor heat exchanger 4 Controller 7, first throttle element 6 can be depressured to the coolant throttle in refrigerant flow, and the first controller 7 can be used for controlling cold The break-make of matchmaker's stream, for example, when the first controller 7 is opened, it is cold between the 4th interface J and the second end of indoor heat exchanger 4 Matchmaker is by the first controller 7, without by first throttle element 6, when the first controller 7 is closed, the 4th interface J and interior are changed Refrigerant between second end of hot device 4 is then by first throttle element 6, without passing through the first controller 7.
Preferably, the 3rd commutation component 5 be three-way magnetic valve, when the 3rd commutation power-off of component 5, the 4th interface J and the Five interface K are connected, and without being connected with the 6th interface L, when the 3rd commutation component 5 is powered, the 4th interface J and the 6th interface L connect It is logical, without connect with the 5th interface K, so that by way of coil electricity or power-off in three-way magnetic valve, realize threeway The commutation of magnetic valve.
The first end of first outdoor heat exchanger 8 is connected with second interface H, the first end and the 5th of the second outdoor heat exchanger 9 Interface K is connected, and is connected with and is connected in parallel between the second end of the second end of the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9 The second restricting element 10 and second controller 11, second controller 11 is used to controlling the break-make of refrigerant in refrigerant flow, second Restricting element 10 can be used for being depressured the coolant throttle in refrigerant flow.It is understood that when second controller 11 is opened When, the refrigerant between the second end of the second end of the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9 flows through second controller 11 To realize the conducting of refrigerant, and without the second restricting element 10, when second controller 11 is closed, the first outdoor heat exchanger 8 The second end and the second outdoor heat exchanger 9 the second end between refrigerant by the second restricting element 10 with reducing pressure by regulating flow, without By second controller 10, thus, changed by being connected in the second restricting element 10 and second controller 11 in parallel first outdoor Between second end of hot device 8 and the second end of the second outdoor heat exchanger 9, the first outdoor can be changed respectively in order to air conditioner 100 The hot outdoor heat exchanger 9 of device 8 and second is defrosted.
One end of first refrigerant flow 12 is connected with the 3rd interface I, and the other end of the first refrigerant flow 12 is connected to second Between the interface K of outdoor heat exchanger 9 and the 5th, one end of the second refrigerant flow 13 is connected with the 6th interface L, the second refrigerant flow 13 The other end be connected between the first outdoor heat exchanger 8 and second interface H, thus, the first refrigerant flow 12 and the second refrigerant stream The break-make on road 13 by second commutation component 3 and the 3rd commutate component 5 commutation control, consequently facilitating air conditioner 100 is to the first Room The outdoor heat exchanger 9 of external heat exchanger 8 or second is defrosted.
Air conditioner 100 in the embodiment of the present invention is defrosting to the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9 respectively When, indoor heat exchanger 4 continues to indoor radiating, while the indoor auxiliary heating device of air conditioner 100 can also be opened, to enter one The indoor heating effect of step increase, because indoor auxiliary heating device is prior art, herein just without being described in detail.Certainly It is understood that in defrosting, if being heated without indoor auxiliary heating device to indoor environment, can also be turned off. In the following description, auxiliary heating device is described exemplified by opening in room when to defrost.
As shown in figure 1, when air conditioner 100 is in refrigeration mode, the first valve port C and the second valve of the first commutation component 2 Mouth D connections, the 3rd valve port E connect with the 4th valve port F, and the first interface G of the second commutation component 3 connects with second interface H, and the 3rd 5th interface K of commutation component 5 is connected with the 4th interface J, and the first controller 7 is closed, and second controller 11 is in Open mode.Through compressor 1 compression after HTHP refrigerant pass through compressor 1 exhaust outlet A, flow through the first valve port C and Second valve port D, then by the first interface G and second interface H of the second commutation component 3, enter the He of the first outdoor heat exchanger 8 Second outdoor heat exchanger 9, and energy exchange is carried out with external environment in the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9, Then by the 5th interface K and the 4th interface J of the 3rd commutation component 5, first throttle element 6 is entered, through first throttle member The refrigerant of low-temp low-pressure is formed after the reducing pressure by regulating flow of part 6, indoor heat exchanger 4 is then gone through with the heat in absorption chamber, reduces room Interior temperature, the refrigerant after heat exchange return to pressure by the 3rd valve port E and the 4th valve port F, and by the gas returning port B of compressor 1 Contracting machine 1, it is reciprocal with this so as to form kind of refrigeration cycle.
As shown in Fig. 2 when air conditioner 100 is in heating mode, the first valve port C and the 3rd valve of the first commutation component 2 Mouth E is connected and the 4th valve port F connects with the second valve port D, and the first interface G of the second commutation component 3 connects with second interface H, the 5th interface K of three commutation components 5 is connected with the 4th interface J, and the first controller 7 is closed, and second controller 11 is opened.It is compressed The refrigerant of HTHP after the compression of machine 1 flows through the first valve port C and the 3rd valve port E by the exhaust outlet A of compressor 1, enters Indoor heat exchanger 4, and exchanged heat indoors in heat exchanger 4 with indoor environment, the liquid refrigerants of HTHP is formed, then into First throttle element 6, the refrigerant of low-temp low-pressure is formed after the reducing pressure by regulating flow of first throttle element 6, by the 3rd commutation component 5 4th interface J and the 5th interface K, enter in the second outdoor heat exchanger 9 and the first outdoor heat exchanger 8 and absorb heat, then pass through The second interface H and first interface G of two commutation components 3, flow through the second valve port D and the 4th valve port F, the gas returning port B through compressor 1 Compressor 1 is returned to, it is reciprocal with this, form the heating circulation of air conditioner 100.
As shown in figure 3, when air conditioner 100 is in the first self-circulating defrosting pattern, during to the first 8 defrost of outdoor heat exchanger, First valve port C of the first commutation component 2 connects with the 3rd valve port E, and the 4th valve port F connects with the second valve port D, the second commutation component 3 first interface G connects with the 3rd interface I, and the 4th interface J of the 3rd commutation component 5 connects with the 6th interface L, the first control Device 7 is opened, and second controller 11 is closed, and indoor auxiliary heating device is opened, now the high temperature of the exhaust outlet A discharges of compressor 1 The refrigerant of high pressure passes through the first valve port C and the 3rd valve port E, flows into the condensation radiating of indoor heat exchanger 4 to improve indoor temperature, then The liquid refrigerants of HTHP is formed, then by the first controller 7, by the 4th interface J and the 6th of the 3rd commutation component 5 Interface L, and by the second refrigerant flow 13, flow into condensation in the first outdoor heat exchanger 8 and radiate to be removed to the first outdoor heat exchanger 8 Frost, after after the reducing pressure by regulating flow of the second restricting element 10, evaporation endothermic in the second outdoor heat exchanger 9 is entered, then pass through One refrigerant flow 12 is flowed into the 3rd interface I and first interface G of the second commutation component 3, then passes through the second valve port D and the 4th Valve port F, the gas returning port B through compressor 1 return to compressor 1, to realize the defrost to the first outdoor heat exchanger 8.To first During the defrost of outdoor heat exchanger 8, indoor heat exchanger 4 continues to indoor heating, along with opening for indoor auxiliary heating device Open and further increase heating effect, which greatly improves the comfortableness of user.
As shown in figure 4, when air conditioner 100 is in the second self-circulating defrosting pattern, during to the second 9 defrost of outdoor heat exchanger, First valve port C of the first commutation component 2 connects with the 3rd valve port E, and the 4th valve port F connects with the second valve port D, the second commutation component 3 first interface G connects with second interface H, and the 4th interface J of the 3rd commutation component 5 connects with the 5th interface K, the first control Device 7 is opened, and second controller 11 is closed, and indoor auxiliary heating device is opened, now the high temperature of the exhaust outlet A discharges of compressor 1 The refrigerant of high pressure passes through the first valve port C and the 3rd valve port E, flows into condensation in indoor heat exchanger 4 and radiates to improve indoor temperature, with The liquid refrigerants of HTHP is formed afterwards, then by the first controller 7, flows through the 4th interface J and the of the 3rd commutation component 5 Five interface K, condense and radiate then into the second outdoor heat exchanger 9, to be defrosted to the second outdoor heat exchanger 9, afterwards by the After the reducing pressure by regulating flow of two restricting element 10, evaporation endothermic in the first outdoor heat exchanger 8 is entered, then passes through the second commutation component 3 Second interface H and first interface G, flow through the second valve port D and the 4th valve port F of the first commutation component 2, returning through compressor 1 Gas port B returns to compressor 1, and the defrost to the second outdoor heat exchanger 9 is back and forth realized with this.To the second outdoor heat exchanger 9 During defrost, indoor heat exchanger 4 continues to indoor heating, along with the unlatching of indoor auxiliary heating device further increases Heating effect, so as to drastically increase the comfortableness of user.
Air conditioner 100 according to embodiments of the present invention, by setting the first outdoor heat exchanger 8 and in air-conditioner outdoor unit Two outdoor heat exchangers 9, and the second restricting element 10 is connected in parallel between the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9 With second controller 11, while the second commutation component 3 and the 3rd is set to commutate component 5, and the first refrigerant flow 12 and second Refrigerant flow 13, this can make indoor heat exchanger 4 in the first outdoor heat exchanger 8 and the second 9 defrost of outdoor heat exchanger continue to Indoor heating, solve the problems, such as that existing air conditioner can not heat indoor when outside is defrosted.
According to some embodiments of the present invention, the first controller 7 is configured to be in normally off, only works as air conditioner 100 when being in defrost pattern, and the first controller 7 is just opened, and thus, without controlling the running status of the first controller 7, is easy to sky The control operation of device 100 is adjusted, the long-time of air conditioner 100 is in and freezes or heat state.
In some embodiments of the invention, second controller 11 is configured to be in normally open, consequently facilitating air-conditioning Normal work of the device 100 in refrigeration mode and heating mode.
Alternatively, first throttle element 6 is capillary or electric expansion valve, and the second restricting element 10 is also capillary or electricity Sub- expansion valve, for example, the restricting element 10 of first throttle element 6 and second can be simultaneously capillary or be electronic expansion simultaneously Valve, certainly, first throttle element 6 can also be one in capillary or electric expansion valve, and the second restricting element 10 is capillary Pipe or electric expansion valve in another.Further alternatively, the restricting element 10 of first throttle element 6 and second is electronics Expansion valve, due to the size by controlling the i.e. controllable cold medium flux of the aperture of electric expansion valve, in electronic expansion valve opening most Without throttling action when big, it is therefore not necessary to set the controller in parallel with electric expansion valve that the reducing pressure by regulating flow to refrigerant can be achieved And break-make, this has saved cost to a certain extent.
According to some embodiments of the present invention, the first outdoor heat exchanger 8 and the second outdoor heat exchanger 9 are two and independent changed Thermal element, thus, it is possible to largely improve the exchange capability of heat of outdoor heat exchanger.Certainly, the invention is not restricted to this, first Two parts of the outdoor heat exchanger 9 of outdoor heat exchanger 8 and second or a heat exchange element, it is not only simple in construction, but also Cost has been saved to a certain extent.
The control method of air conditioner according to embodiments of the present invention is described in detail below, wherein according to air conditioner The air conditioner of the above embodiment of the present invention, the first temperature sensor, second temperature sensor and the 3rd can be provided with air conditioner Temperature sensor, wherein, the first temperature sensor is used for the temperature for detecting the first outdoor heat exchanger, and second temperature sensor is used for The temperature of the second outdoor heat exchanger is detected, three-temperature sensor is used to detect the environment temperature in air-conditioner outdoor unit.
The control method of air conditioner according to embodiments of the present invention is as follows:
When following either condition meets, control air conditioner enters the first self-circulating defrosting pattern, in the first self-loopa During white pattern, the first valve port of the first commutation component connects with the 3rd valve port, and the 4th valve port connects with the second valve port, the second commutation The first interface of component and the 3rd orifice, the 4th interface and the 6th orifice of the 3rd commutation component, the first controller Open, second controller is closed, and the first outdoor heat exchanger is defrosted:
Condition one, after compressor accumulative operation t1 minutes, the first temperature T1 is less than first predetermined value T11, and first is warm Degree T1 and the first predetermined difference value BT1 sums are less than or equal to T10, and the 3rd temperature T3 > third predetermined value T33, wherein the first temperature The temperature that T1 is the first outdoor heat exchanger is spent, second temperature T2 is the temperature of the second outdoor heat exchanger, and the 3rd temperature T3 is air-conditioning Environment temperature in device outdoor unit, T10 are that air conditioner heat-production runs and arrives m2 minutes after compressor start continuous service m1 minutes Interior T1 minimum value.
Condition two, after compressor accumulative operation t2 minutes, the first temperature T1 is less than the 4th predetermined value T12, the 3rd temperature The predetermined value T34 of T3 > the 5th, and continue m3 minutes.
Condition three, after compressor accumulative operation t3 minutes, the first temperature T1 is less than the 6th predetermined value T13, the 3rd temperature The predetermined value T35 of T3 > the 7th.
Meet between environment temperature in temperature, air-conditioner outdoor unit and each preset temperature when the first outdoor heat exchanger When above-mentioned condition one is to any one condition in condition three, air conditioner just enters the first self-circulating defrosting pattern, to first Outdoor heat exchanger defrost.
It is understood that first predetermined value T11, the first predetermined difference value BT1, third predetermined value T33, the 4th predetermined value T12, the 5th predetermined value T34, the 6th predetermined value T13 and the 7th predetermined value T35 concrete numerical value can be carried out according to actual conditions Specific setting, just limited here without specific.Simultaneously in condition one, condition two, condition three during the accumulation operation of compressor Between can also specifically be limited according to actual conditions.
When following either condition meets, control air conditioner enters the second self-circulating defrosting pattern, in the second self-loopa White pattern, the first valve port of the first commutation component connect with the 3rd valve port, and the 4th valve port connects with the second valve port, the second commutation group The first interface of part is connected with second interface, and the 4th interface and the 5th orifice of the 3rd commutation component, the first controller are opened Open, second controller is closed, and the second outdoor heat exchanger is defrosted:
Condition four, after compressor accumulative operation t4 minutes, second temperature T2 is less than the first setting value T21, and second is warm The settings of degree T2 and second difference BT2 sums are less than or equal to T20, and the 3rd temperature T3 > the 3rd setting value T331, wherein T20 are Air conditioner heat-production is run and after compressor start continuous service m1 minutes to the minimum value of the T2 in m2 minutes.
Condition five, after compressor accumulative operation t5 minutes, second temperature T2 is less than the 4th setting value T22, the 3rd temperature The setting value T341 of T3 > the 5th, and continue m31 minutes.
Condition six, after compressor accumulative operation t6 minutes, second temperature T2 is less than the 6th setting value T23, the 3rd temperature The setting value T351 of T3 > the 7th.
Meet between environment temperature in temperature, air-conditioner outdoor unit and each preset temperature when the second outdoor heat exchanger When above-mentioned condition four is to any one condition in condition six, air conditioner just enters the second self-circulating defrosting pattern, to second Outdoor heat exchanger defrost.
It is understood that the first setting value T21, the second setting difference BT2, the 3rd setting value T331, the 4th setting value T22, the 5th setting value T341, the 6th setting value T23 and the 7th setting value T351 concrete numerical value can be entered according to actual conditions The specific setting of row, is just limited without specific here.The accumulation of compressor is run in condition four, condition five, condition six simultaneously Time can also specifically limit according to actual conditions.
When meeting to enter the first self-circulating defrosting pattern and the second self-circulating defrosting pattern simultaneously, first is initially entered certainly Circulate defrost pattern, after enter back into the second self-circulating defrosting pattern.If it is understood, however, that the first outdoor heat exchanger and There was only one among second outdoor heat exchanger and meet defrost condition, then entrance meets oneself of that outdoor heat exchanger of defrost condition Circulate defrost pattern.
The first self-circulating defrosting pattern is run in air conditioner or during the second self-circulating defrosting pattern, when detecting that satisfaction exits During condition, defrost is exited, that is to say, that be currently running the air-conditioning of the first self-circulating defrosting pattern or the second self-circulating defrosting pattern Device exits defrost pattern at once when detecting that satisfaction exits the condition of defrost, switches to heating mode or refrigeration mode.
According to the control method of the air conditioner of the present invention, during the defrost of air conditioner, indoor heat exchanger can be held Continue to indoor radiating, so as to ensure that the lasting heating of indoor set during defrost, this improves user and existed to a certain extent Using comfortableness during air conditioner heat-production function, while by detecting the temperature of the first outdoor heat exchanger and the second outdoor heat exchanger Degree, and by it compared with predetermined value to determine whether to be defrosted, can be defrosted according to actual conditions, avoid air-conditioning Device is defrosted in frostless situation and wastes energy, ensure that the purpose that realization has frost to defrost.
Further, in the first self-circulating defrosting pattern, exit criteria is:Detect that T1 is higher than the first design temperature It is worth, detects T1 higher than the second set temperature value and continued for first scheduled time or detect to remove the first outdoor heat exchanger Frost time more than the first setting time, wherein the first set temperature value is more than the second set temperature value.
When being defrosted to the second outdoor heat exchanger, exit criteria is:Detect that T2 is higher than the 3rd set temperature value, detected T2 is higher than the 4th set temperature value and continued for second scheduled time or detect the time defrosted to the second outdoor heat exchanger More than the second setting time, wherein the 3rd set temperature value is more than the 4th set temperature value.
When the first self-circulating defrosting pattern and the second self-circulating defrosting pattern meet respective exit criteria respectively, air-conditioning Device exits defrost pattern immediately, so as to switch to heating mode or refrigeration mode, to continue to indoor heating or refrigeration.
For example, when air conditioner is in heating mode, compressor open record compressor start continuously after 7 minutes arrive by operation T1 minimum values T10, T2 minimum value in 12 minutes is T20.
As shown in figure 5, if compressor start or the first outdoor heat exchanger defrost terminate rear timing and started, compressor adds up After operation 29 minutes, decision condition one, if T1 < first predetermined values T11 (for example, T11=-7 DEG C), and the predetermined difference values of T1+ first BT1 (for example, BT1=2.5 DEG C)≤T10, and the 3rd temperature T3 > third predetermined values T33 (for example, T33=-22 DEG C), if meeting Condition one, while check whether the second outdoor heat exchanger defrost flag is 0, and if 0, air conditioner just enters the first self-loopa White pattern, so as to the first outdoor heat exchanger defrost, now the defrost flag of the first outdoor heat exchanger is 1.If it is unsatisfactory for condition One, then continue decision condition two and condition three, if there is a satisfaction in condition two and condition three, and the second outdoor heat exchanger defrost Flag is 0, then air conditioner enters the first self-circulating defrosting pattern.
After air conditioner enters the first self-circulating defrosting pattern 1s, T1 is persistently detected, when detecting that T1 > first set temperature During angle value (for example, the first set temperature value is 18 DEG C), the first self-circulating defrosting pattern is exited, otherwise continues to detect, works as detection To the set temperature values of T1 > second (for example, the second set temperature value be 8 DEG C), and continued for first scheduled time (such as first is pre- Fix time as 30 seconds), or detect air conditioner to the time that the first outdoor heat exchanger is defrosted more than the first setting time (example Such as, the first setting time is 3 minutes) when, air conditioner exits the first self-circulating defrosting pattern, now the change of the first outdoor heat exchanger White flag is 0.
As shown in fig. 6, if compressor start or the second outdoor heat exchanger defrost terminate rear timing and started, compressor adds up After operation 29 minutes, decision condition four, if T2 < the first setting value T21 (for example, T21=-7 DEG C), and T2+ second sets difference BT2 (for example, BT2=2.5 DEG C)≤T20, and the setting value T331 (for example, T331=-22 DEG C) of the 3rd temperature T3 > the 3rd, if full Sufficient condition four, while check whether the first outdoor heat exchanger defrost flag is 0, and if 0, air conditioner just enters the second self-loopa Defrost pattern, so as to the second outdoor heat exchanger defrost, now the defrost flag of the second outdoor heat exchanger is 1, if being unsatisfactory for bar Part four, then air conditioner continues decision condition five and condition six, if there is a satisfaction in condition five and condition six, and the first outdoor is changed Hot device defrost flag is 0, then air conditioner enters the second self-circulating defrosting pattern.
Air conditioner enter the second self-circulating defrosting pattern 1s after, persistently detect T2, when detect T2 > the 3rd setting temperature During angle value (for example, the 3rd set temperature value is 18 DEG C), the second self-circulating defrosting pattern is exited, otherwise continues to detect, works as detection To the set temperature values of T2 > the 4th (for example, the 4th set temperature value be 8 DEG C), and continued for second scheduled time (such as second is pre- Fix time as 30 seconds), or detect air conditioner to the time that the second outdoor heat exchanger is defrosted more than the second setting time (example Such as, the second setting time is 3 minutes) when, air conditioner exits the second self-circulating defrosting pattern, now the change of the second outdoor heat exchanger White flag is 0.
After air conditioner exits defrost pattern, the first controller is closed, and second controller is in opening, the The first interface of two commutation components connects with second interface, the 5th interface and the 4th orifice of the 3rd commutation component, air-conditioning Device enters heating mode or refrigeration mode, exits defrost pattern in air conditioner and enters heating mode certain time (for example, 4 Minute) auxiliary heating device is closed in rear chamber.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims (9)

1. a kind of control method of air conditioner, it is characterised in that the air conditioner includes:Compressor, the first commutation component, second Commutate component, indoor heat exchanger, the 3rd commutation component, the first outdoor heat exchanger and the second outdoor heat exchanger, the first refrigerant flow With the second refrigerant flow, the compressor has an exhaust outlet and gas returning port, and the first commutation component has the first valve port to the Four valve ports, first valve port connect with one of in the second valve port and the 3rd valve port, the 4th valve port and described the Two valve ports connect with another in the 3rd valve port, and first valve port is connected with the exhaust outlet, the 4th valve port It is connected with the gas returning port, there is the second commutation component first interface to the 3rd interface, the first interface to be connect with second Mouthful connected with one of in the 3rd interface, the first interface is connected with second valve port, the indoor heat exchange The first end of device is connected with the 3rd valve port, and the 3rd commutation component has the 4th to be interfaced to the 6th interface, and the described 4th Interface connects with one of in the 5th interface and the 6th interface, and the of the 4th interface and the indoor heat exchanger Be connected with the first throttle element and the first controller being connected in parallel between two ends, the first end of first outdoor heat exchanger with The second interface is connected, and the first end of second outdoor heat exchanger is connected with the 5th interface, and first outdoor is changed The second restricting element being connected in parallel and are connected between second end of hot device and the second end of second outdoor heat exchanger Two controllers, one end of first refrigerant flow are connected with the 3rd interface, and the other end of first refrigerant flow connects It is connected between second outdoor heat exchanger and the 5th interface, one end of second refrigerant flow and the 6th interface It is connected, the other end of second refrigerant flow is connected between first outdoor heat exchanger and the second interface, described Control method is as follows:
When following either condition meets, control the air conditioner to enter the first self-circulating defrosting pattern, followed certainly described first Ring defrost pattern, second controller are closed, the first outdoor heat exchanger are defrosted:
Condition one, after compressor accumulative operation t1 minutes, the first temperature T1 is less than first predetermined value T11, and the first temperature T1 It is less than or equal to T10, and the 3rd temperature T3 > third predetermined value T33 with the first predetermined difference value BT1 sums, wherein the first temperature T1 For the temperature of the first outdoor heat exchanger, second temperature T2 is the temperature of the second outdoor heat exchanger, and the 3rd temperature T3 is air conditioner chamber Environment temperature in outer machine, the T10 are that air conditioner heat-production runs and arrives m2 minutes after compressor start continuous service m1 minutes Interior T1 minimum value;
Condition two, after compressor accumulative operation t2 minutes, the first temperature T1 is less than the 4th predetermined value T12, the 3rd temperature T3 > 5th predetermined value T34, and continue m3 minutes;
Condition three, after compressor accumulative operation t3 minutes, the first temperature T1 is less than the 6th predetermined value T13, the 3rd temperature T3 > 7th predetermined value T35;
When following either condition meets, control the air conditioner to enter the second self-circulating defrosting pattern, followed certainly described second Ring defrost pattern, second controller are closed, the second outdoor heat exchanger are defrosted:
Condition four, after compressor accumulative operation t4 minutes, second temperature T2 is less than the first setting value T21, and second temperature T2 It is less than or equal to T20, and the setting value T331 of the 3rd temperature T3 > the 3rd with the second setting difference BT2 sums, wherein the T20 is Air conditioner heat-production is run and after compressor start continuous service m1 minutes to the minimum value of the T2 in m2 minutes;
Condition five, after compressor accumulative operation t5 minutes, second temperature T2 is less than the 4th setting value T22, the 3rd temperature T3 > 5th setting value T341, and continue m31 minutes;
Condition six, after compressor accumulative operation t6 minutes, second temperature T2 is less than the 6th setting value T23, the 3rd temperature T3 > 7th setting value T351;
Wherein when meeting to enter the first self-circulating defrosting pattern and the second self-circulating defrosting pattern simultaneously, first is initially entered certainly Circulate defrost pattern, after enter back into the second self-circulating defrosting pattern;
When air conditioner runs the first self-circulating defrosting pattern or the second self-circulating defrosting pattern, meet exit criteria when detecting When, exit defrost.
2. the control method of air conditioner according to claim 1, it is characterised in that
In the first self-circulating defrosting pattern, the exit criteria is:Detect that T1 is higher than the first set temperature value, detects T1 Higher than the second set temperature value and continue first scheduled time or detection first outdoor heat exchanger is defrosted when Between more than the first setting time, wherein first set temperature value is more than second set temperature value;
When being defrosted to second outdoor heat exchanger, the exit criteria is:Detect T2 higher than the 3rd set temperature value, inspection T2 is measured higher than the 4th set temperature value and continued for second scheduled time or detect to remove second outdoor heat exchanger Frost time more than the second setting time, wherein the 3rd set temperature value is more than the 4th set temperature value.
3. the control method of air conditioner according to claim 1, it is characterised in that the second commutation component is two three Three-way electromagnetic valve.
4. the control method of air conditioner according to claim 1, it is characterised in that the 3rd commutation component is two three Three-way electromagnetic valve.
5. the control method of air conditioner according to claim 1, it is characterised in that the first commutation component is four-way Valve.
6. the control method of air conditioner according to claim 1, it is characterised in that first controller is configured to In normally off.
7. the control method of air conditioner according to claim 1, it is characterised in that the second controller is configured to locate In normally open.
8. the control method of air conditioner according to claim 1, it is characterised in that the first throttle element is capillary Or electric expansion valve, second restricting element are capillary or electric expansion valve.
9. the control method of air conditioner according to claim 1, it is characterised in that first outdoor heat exchanger and described Second outdoor heat exchanger is two independent heat exchange elements, or first outdoor heat exchanger and second outdoor heat exchanger For two parts of a heat exchange element.
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CN106440434B (en) * 2016-10-19 2022-11-08 广东美的制冷设备有限公司 Air conditioning system and control method thereof
CN106839312A (en) * 2017-02-06 2017-06-13 邯郸美的制冷设备有限公司 The control method and control device and air-conditioner of defrost are not shut down
CN108386974B (en) * 2018-01-29 2021-11-02 青岛海尔空调电子有限公司 Air-cooled magnetic suspension air conditioning unit and control method thereof
CN109458700B (en) * 2018-11-08 2020-08-25 珠海格力电器股份有限公司 Multi-online defrosting method and device, storage medium, computer equipment and air conditioner
CN109974203B (en) * 2019-03-06 2021-03-23 青岛海信日立空调系统有限公司 Defrosting method of air conditioner and air conditioner

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