CN111664549A - Air conditioner - Google Patents

Air conditioner Download PDF

Info

Publication number
CN111664549A
CN111664549A CN202010523966.9A CN202010523966A CN111664549A CN 111664549 A CN111664549 A CN 111664549A CN 202010523966 A CN202010523966 A CN 202010523966A CN 111664549 A CN111664549 A CN 111664549A
Authority
CN
China
Prior art keywords
outdoor heat
outdoor
heat exchanger
defrosting
defrosted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010523966.9A
Other languages
Chinese (zh)
Other versions
CN111664549B (en
Inventor
石丽华
张恒
高永坤
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.)
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Original Assignee
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Hitachi Air Conditioning System Co Ltd filed Critical Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority to CN202010523966.9A priority Critical patent/CN111664549B/en
Publication of CN111664549A publication Critical patent/CN111664549A/en
Priority to PCT/CN2021/098800 priority patent/WO2021249372A1/en
Priority to US18/063,204 priority patent/US20230107874A1/en
Application granted granted Critical
Publication of CN111664549B publication Critical patent/CN111664549B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Abstract

The invention discloses an air conditioner, comprising: at least one indoor unit; at least one outdoor unit module, each outdoor unit module includes: a compressor; a flow path switching device for switching a flow path of the refrigerant discharged from the compressor; a plurality of outdoor heat exchangers arranged in parallel; a plurality of tube restrictions; the outdoor fans and the corresponding outdoor heat exchangers form a wind field respectively; a defrosting circuit that branches a part of the refrigerant discharged from the compressor and selects one of the plurality of outdoor heat exchangers in response to the branching of the part of the refrigerant and allows the refrigerant to flow therein; a separation device for separating adjacent wind farms; when the plurality of outdoor heat exchangers need defrosting, the control device alternately defrosts the plurality of outdoor heat exchangers to be defrosted. The invention is used for realizing the uninterrupted continuous heating of the air conditioner in the full working condition range, has good defrosting effect, and reduces the influence on the indoor temperature fluctuation and improves the user experience because the plurality of outdoor machine heat exchangers defrost alternately when a plurality of outdoor machine modules exist.

Description

Air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner.
Background
The technology of the air source heat pump multi-split air conditioner is mature day by day, and the air source heat pump multi-split air conditioner is widely applied to the fields of household and business. The air source heat pump multi-split air conditioner comprises at least one indoor unit and at least one outdoor unit module, wherein when the number of the indoor units is two or more, the indoor units are arranged in parallel, each indoor unit is provided with an indoor heat exchanger and a corresponding indoor fan, when the number of the outdoor unit modules is two or more, the outdoor unit modules are arranged in parallel, each outdoor unit module is provided with a variable frequency compressor, a four-way valve, a throttling element, at least one outdoor heat exchanger and an outdoor fan, which are communicated through a connecting pipeline, and when the number of the outdoor heat exchangers is at least two, the outdoor heat exchangers are arranged in parallel.
The air source heat pump has a big problem in heating operation: when outdoor temperature and humidity reach certain conditions, outdoor heat exchanger air side can frost, and along with the increase of the volume of frosting, the evaporimeter surface can be blockked up gradually, leads to outdoor heat exchanger surface heat transfer coefficient to reduce, and the gas flow resistance increases, seriously influences the machine effect of heating, consequently, the unit needs regularly to defrost.
At present, a reverse defrosting mode is mostly adopted, the reversing is mainly realized by opening a four-way valve, an outdoor unit is switched into a condenser, the defrosting is realized by utilizing the sensible heat and the latent heat of condensation of a high-temperature and high-pressure refrigerant, the defrosting speed is high, and the reliability is good. However, when defrosting is performed, heating operation is stopped, and heat is absorbed from the indoor space due to the fact that the indoor heat exchanger is switched to the evaporator, so that the indoor temperature is obviously reduced, and indoor thermal comfort is seriously affected.
In order to solve the problems, an uninterrupted heating defrosting mode is adopted, and a plurality of parallel outdoor heat exchangers are used for defrosting alternately, namely, only one outdoor heat exchanger is controlled to defrost each time, and other outdoor heat exchangers still maintain heating operation, so that uninterrupted heating is realized. However, when the defrosting is performed alternately, the air fields of the parallel outdoor heat exchangers are not partitioned, so that the outdoor heat exchanger in defrosting still has air to pass through, and when the outdoor temperature is low, the outdoor heat exchanger in defrosting has the condition that the condensation load is too large and defrosting cannot be performed, so that the defrosting effect is poor.
Disclosure of Invention
The embodiment of the invention provides an air conditioner, which is used for realizing the uninterrupted continuous heating of the air conditioner in the full working condition range, has a good defrosting effect, and reduces the influence on the indoor temperature fluctuation and improves the user experience because a plurality of outdoor machine heat exchangers are used for defrosting alternately when a plurality of outdoor machine modules exist.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
the present application relates to an air conditioner, comprising:
at least one indoor unit; .
At least one outdoor unit module, each outdoor unit module includes:
a compressor;
a flow path switching device for switching a flow path of the refrigerant discharged from the compressor;
a plurality of outdoor heat exchangers arranged in parallel;
a plurality of liquid pipe throttles each connecting the indoor unit and the outdoor heat exchanger;
the outdoor fans respectively correspond to the outdoor heat exchangers and form a wind field with the corresponding outdoor heat exchangers;
a defrosting circuit that branches a part of the refrigerant discharged from the compressor and selects one of the plurality of outdoor heat exchangers to allow the refrigerant to flow therein;
a separation device for separating adjacent wind farms;
a control device for controlling each flow path switching device, each liquid pipe throttling device, each outdoor fan and each defrosting circuit;
in some embodiments of the present application, when a plurality of outdoor heat exchangers need to be defrosted, the control device performs alternate defrosting on each outdoor heat exchanger to be defrosted;
when the defrosting is performed by turns, the air conditioner controls the flow path switching device to be opened, controls the defrosting loop to enable the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger to be defrosted, cuts off the liquid pipe throttling device communicated with the outdoor heat exchanger to be defrosted, and closes the outdoor fan corresponding to the outdoor heat exchanger to be defrosted, so that the outdoor heat exchanger to be defrosted is operated as the defrosting heat exchanger, and the rest outdoor heat exchangers are operated as the evaporators.
Therefore, the air fields where the outdoor heat exchangers in the outdoor unit modules are located are separated by the separating device, the adjacent air fields are not interfered with each other, the air fields where the outdoor heat exchangers are located can operate simultaneously when the air conditioner operates for heating or cooling, when the air conditioner performs alternate defrosting, the outdoor fan in the air field where the outdoor heat exchanger which is defrosting is located is closed and is re-opened when the air conditioner shifts to a normal heating mode, and the outdoor fans in the air fields where the other outdoor heat exchangers are located are opened.
In some embodiments of the present application, an air conditioner is provided, comprising:
at least one indoor unit;
at least one outdoor unit module, each outdoor unit module includes:
a compressor;
a flow path switching device for switching a flow path of the refrigerant discharged from the compressor;
a plurality of outdoor heat exchangers arranged in parallel;
a plurality of liquid pipe throttles each connecting the indoor unit and the outdoor heat exchanger;
at least one outdoor fan, the number of which is less than the number of the outdoor heat exchangers;
a defrosting circuit that branches a part of the refrigerant discharged from the compressor and selects one of the plurality of outdoor heat exchangers to allow the refrigerant to flow therein;
a partition device for selectively forming a wind screen between any outdoor heat exchanger and the outdoor fan;
a control device for controlling each flow path switching device, each liquid pipe throttling device, each outdoor fan, each defrosting circuit and each separating device;
when the plurality of outdoor heat exchangers need defrosting, the control device alternately defrosts the outdoor heat exchangers to be defrosted;
when the defrosting is performed by turns, the air conditioner controls the flow path switching device to be opened, controls the defrosting loop to enable the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger to be defrosted, cuts off the liquid pipe throttling device communicated with the outdoor heat exchanger to be defrosted, and controls the separating device to form an air screen between the outdoor heat exchanger to be defrosted and the outdoor fan, so that the outdoor heat exchanger to be defrosted is operated as a defrosting heat exchanger, and the rest outdoor heat exchangers are operated as evaporators.
In some embodiments of the present application, the defrost circuit comprises:
a plurality of defrost branches respectively corresponding to the plurality of outdoor heat exchangers in each outdoor unit module;
and the plurality of throttling devices are respectively and correspondingly arranged on each defrosting branch and are controlled by the control device.
In some embodiments of the present application, the throttling device is an electronic expansion valve.
In some embodiments of the present application, the control device is configured to: when the outdoor heat exchangers in the outdoor unit modules are defrosting, the rotating speed of outdoor fans corresponding to the other outdoor heat exchangers in the outdoor unit modules which are defrosting is increased.
In some embodiments of the present application, the pipe-throttling device is an electronic expansion valve.
In some embodiments of the present application, the control device is configured to: when the outdoor heat exchanger to be defrosted is defrosted, if the first preset defrosting time is reached, the outdoor heat exchanger to be defrosted exits the defrosting process and enters a common heating operation process.
In some embodiments of the present application, the control device is configured to:
when the outdoor heat exchanger to be defrosted is defrosted, if the air pipe temperature of the outdoor heat exchanger to be defrosted is greater than or equal to a first temperature preset value and the suction pressure of the compressor is greater than or equal to a first pressure set value, the outdoor heat exchanger to be defrosted exits the defrosting process and enters a normal heating operation process.
In some embodiments of the present application, the exiting of the defrosting process and entering of the outdoor heat exchanger to be defrosted into the normal heating operation process specifically include:
opening an outdoor fan corresponding to the outdoor heat exchanger;
controlling to disconnect a defrost circuit that communicates refrigerant discharged from the compressor with the outdoor heat exchanger;
and controlling to open a liquid pipe throttling device communicated with the outdoor heat exchanger.
In some embodiments of the present application, when at least one of the corresponding completion times of all the outdoor heat exchangers to be defrosted after completing the defrosting by turns reaches a second preset defrosting time, the reverse defrosting operation mode is selected as the next defrosting operation mode.
In some embodiments of the present application, the control device is configured to:
when the outdoor heat exchanger to be defrosted is defrosted, if the first preset defrosting time is reached, the outdoor heat exchanger to be defrosted quits the defrosting process, the separating device is controlled to enable the outdoor fan to supply air to the outdoor heat exchanger, the outdoor fan is controlled to be disconnected to enable the refrigerant discharged by the compressor to be communicated with the defrosting loop of the outdoor heat exchanger, and the liquid pipe throttling device communicated with the outdoor heat exchanger is opened.
In some embodiments of the present application, the control device is configured to:
when the outdoor heat exchanger to be defrosted is defrosted, if the air pipe temperature of the outdoor heat exchanger to be defrosted is greater than or equal to a first temperature preset value and the suction pressure of the compressor is greater than or equal to a first pressure set value, the outdoor heat exchanger to be defrosted quits the defrosting process, and the separating device is controlled to enable the outdoor fan to supply air to the outdoor heat exchanger, control the defrosting loop which enables the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger to be disconnected, and open the liquid pipe throttling device communicated with the outdoor heat exchanger.
In some embodiments of the present application, the air conditioner further comprises: a detection device for detecting the amount of frost formation of the outdoor heat exchanger; and the control device performs alternate defrosting according to the frosting amount of the outdoor heat exchangers to be defrosted.
In some embodiments of the present application, the detection device detects a liquid pipe temperature of the outdoor heat exchanger; the higher the temperature of the liquid pipe of the outdoor heat exchanger is, the lower the corresponding frost formation amount is.
In some embodiments of the present application, each outdoor unit module further includes:
the separation device is arranged in the shell and divides the shell into a plurality of air channels, and each air channel is internally provided with one outdoor heat exchanger in the outdoor unit and an outdoor fan corresponding to the outdoor heat exchanger;
each air channel, the outdoor heat exchanger and the outdoor fan in the air channel form an air channel system;
the air duct systems operate independently of each other.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are 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 system structure diagram of an embodiment of an air conditioner according to the present invention;
FIG. 2 is a flow chart of defrosting operation for defrosting the air conditioner according to the embodiment of the present invention;
FIG. 3 is a flow chart of an embodiment of an air conditioner according to the present invention when an outdoor heat exchanger to be defrosted is being defrosted while the air conditioner is in a rotating defrost mode of operation;
FIG. 4 is a graph of indoor temperature change when an embodiment of the air conditioner proposed by the present invention is in a shift defrost mode of operation;
fig. 5 is a sectional view of an outdoor unit module in an embodiment of an air conditioner according to the present invention;
fig. 6 is a perspective view of a partitioning means in an outdoor unit module in an embodiment of an air conditioner according to the present invention;
fig. 7 is a schematic structural view of an outdoor unit module in an embodiment of an air conditioner according to the present invention;
fig. 8 is another schematic structural diagram of an outdoor unit module according to an embodiment of the present invention.
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 specific cases to those skilled 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.
[ basic operation principle of air conditioner ]
A refrigeration cycle of an air conditioner includes a compressor, a condenser, an expansion valve, and an evaporator. 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 an air conditioner refers to a portion including a compressor of a refrigeration cycle and includes an outdoor heat exchanger, the indoor unit of an air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit of an air conditioner.
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.
[ air-conditioner ]
In the present application, the outdoor unit module is similar to the air conditioning outdoor unit as described above.
Referring to fig. 1, the air conditioner of the present application refers to a multi-split air conditioner.
The air conditioner includes at least one indoor unit, which are arranged in parallel.
Each indoor unit includes an indoor heat exchanger 5-1 to 5-4 (i.e., an indoor heat exchanger as described above) and an indoor fan 6-1 to 6-4, respectively, and the indoor fan 6-1 to 6-4 serves to blow cold or hot air generated by the indoor heat exchanger 5-1 to 5-4 toward an indoor space, respectively.
The air conditioner includes at least one outdoor unit module, and outdoor unit modules a and a' are shown in fig. 1, which are arranged in parallel.
Each of the outdoor unit modules a and a' includes a compressor 1, a flow path switching device 2, a plurality of outdoor heat exchangers arranged in parallel, a plurality of pipe throttles, a plurality of outdoor fans, a defrost circuit, and a partition device 16, respectively.
The outdoor unit modules a and a' have the same structure.
The structure of the outdoor unit module a will be described as an example.
The flow path switching device 2 switches the flow path of the refrigerant discharged from the compressor 1. In the present application, the flow path switching device 2 is a four-way valve having four terminals C, D, S and E.
When the four-way valve is powered off, the default C is connected with the default D, and the default S is connected with the default E, so that the heat exchangers 5-1 to 5-4 of the indoor unit are used as evaporators, and the air conditioner refrigerates.
When the four-way valve is electrified and reversed, the C is connected with the S, and the D is connected with the E, so that the heat exchangers 5-1 to 5-4 of the indoor unit are used as condensers, and the air conditioner heats.
The number of the outdoor heat exchangers can be the same as that of the outdoor fans and corresponds to that of the outdoor fans one by one; or a plurality of outdoor heat exchangers belonging to the same outdoor unit module may share a smaller number of outdoor fans, for example, two outdoor heat exchangers belonging to the same outdoor unit module a or a' share the same outdoor fan.
As shown in fig. 1, the number of the outdoor heat exchangers is the same as the number of the outdoor fans, and corresponds to one another.
The outdoor unit module a has an outdoor heat exchanger 11-1 (11-2), an outdoor fan 12-1 (12-2), a liquid pipe throttling means 10-1 (10-2) connecting liquid pipes of the indoor heat exchangers 5-1 to 5-4 and a liquid pipe of the outdoor heat exchanger 11-1, and a gas pipe throttling means 13-1 (13-2) connecting a gas pipe of the outdoor heat exchanger 11-1 (11-2) and a return air port of the compressor 1.
The outdoor fans 12-1 and 12-2 are independently controlled by a control device (not shown), and form respective wind fields with their corresponding outdoor heat exchangers 11-1 and 11-2.
And the separating device 16 is used for separating the adjacent wind fields, so that the respective wind fields are independent and not influenced.
That is, it does not blow wind to the outdoor heat exchanger 11-1 when the outdoor fan 12-1 is operated, and it does not blow wind to the outdoor heat exchanger 11-2 when the outdoor fan 12-2 is operated and the outdoor fan 12-1 is not operated.
The specific structure of the partition 16 is described below.
When the same outdoor fan is shared by the outdoor heat exchangers belonging to the same outdoor unit module a or a', that is, the outdoor unit module a has the outdoor heat exchanger 11-1 (11-2), an outdoor fan (not shown, and denoted as F for convenience of explanation herein), a liquid pipe throttling means 10-1 (10-2) connecting liquid pipes of the indoor heat exchangers 5-1 to 5-4 and a liquid pipe of the outdoor heat exchanger 11-1, and a gas pipe throttling means 13-1 (13-2) connecting a gas pipe of the outdoor heat exchanger 11-1 (11-2) and a return port of the compressor 1.
The outdoor fan F is controlled by the control device and is used for exchanging heat with the flowing air by the outdoor heat exchanger 11-1 and/or 11-2.
A partition (not shown, herein designated as S for convenience of explanation) controlled by the control device to selectively form a wind screen between one of the two outdoor heat exchangers 11-1 or 11-2 and the outdoor fan F belonging to the same outdoor unit module a or a'.
That is, when defrosting of one of the outdoor heat exchangers, for example, the outdoor heat exchanger 11-1, in one outdoor unit module a or a', is required, the partitioning device S is controlled to form a wind screen between the outdoor heat exchanger 11-1 and the outdoor fan F, so that the outdoor heat exchanger 11-1 is located in the wind isolation area, and the outdoor heat exchanger 11-2 and the outdoor fan F are located in the wind supply area, thereby ensuring that the outdoor heat exchanger 11-1 is protected from wind generated by the outdoor fan F during defrosting.
When one of the outdoor heat exchangers, such as the outdoor heat exchanger 11-2, in one outdoor unit module a or a' needs to be defrosted, the separating device S is controlled to form a wind screen between the outdoor heat exchanger 11-2 and the outdoor fan F, so that the outdoor heat exchanger 11-2 is located in the wind-separating area, and the outdoor heat exchanger 11-1 and the outdoor fan F are located in the wind-supplying area, thereby ensuring that the outdoor heat exchanger 11-2 is not affected by the wind generated by the outdoor fan F when the outdoor heat exchanger 11-2 is defrosted.
The specific structure of the separator S is described below.
The defrost circuit branches a portion of the refrigerant discharged from the compressor 1 and allows the refrigerant to flow in corresponding to selection of one of the outdoor heat exchangers 11-1 and 11-2. That is, after a portion of the refrigerant discharged from the compressor 1 is branched, it does not flow into the outdoor heat exchangers 11-1 and 11-2 through the defrost circuit, respectively, i.e., it flows into the outdoor heat exchangers 11-1 and 11-2 alternately.
Referring to fig. 1, a defrost branch 15-1 'is provided between a discharge port of a compressor 1 and a liquid pipe of an outdoor heat exchanger 11-1, and a defrost branch 15-2' is provided between the discharge port of the compressor 1 and the liquid pipe of the outdoor heat exchanger 11-2.
A throttling device 15-1 is provided on the defrosting branch 15-1' for allowing part of the refrigerant discharged from the compressor 1 to be throttled to a suitable pressure by the throttling device 15-1 to enter the outdoor heat exchanger 11-1 for heat exchange defrosting when turned on.
A throttling device 15-2 is arranged on the defrosting branch 15-2' and is used for throttling part of refrigerant discharged by the compressor 1 to a proper pressure through the throttling device 15-2 when the defrosting branch is opened so as to enter the outdoor heat exchanger 11-2 for heat exchange defrosting.
In order to prevent the refrigerant passing through the indoor heat exchangers 5-1 to 5-4 from being heat-exchanged and then flowing into the outdoor heat exchangers 11-1 or 11-2 when the outdoor heat exchanger 11-1 or 11-2 is defrosted without interruption, one end of the defrosting branch 15-1 'is formed on a pipe between the liquid pipe throttling means 10-1 and the liquid pipe of the outdoor heat exchanger 11-1, and one end of the defrosting branch 15-2' is formed on a pipe between the liquid pipe throttling means 10-2 and the liquid pipe of the outdoor heat exchanger 11-2.
Similarly, referring to fig. 1, the structure of an outdoor unit module a 'can be obtained, as shown by the dotted line frame in fig. 1, and the structure of the outdoor unit module a' is the structure of the outdoor unit module a.
The control means is used to control the flow path switching means 2, the liquid pipe throttling means 10-1 and 10-2, the air pipe throttling means 13-1 and 13-2, the respective defrosting circuits (i.e., the throttling means 15-1 and 15-2), and the outdoor fans 12-1 and 12-2 in the outdoor unit modules a and a'.
The liquid pipe throttling devices 10-1 and 10-2 and the throttling devices 15-1 and 15-2 can adopt electronic expansion valves, combinations of throttling capillary tubes and one-way valves, combinations of throttling capillary tubes and electromagnetic valves, or bidirectional thermal expansion valves and the like.
The air pipe throttling devices 13-1 and 13-2 can adopt an electronic expansion valve, a throttling capillary tube, a combination of a throttling capillary tube and a one-way valve, a combination of a throttling capillary tube and an electromagnetic valve, a two-way thermal expansion valve and the like.
[ operation mode of air conditioner ]
The air conditioner has a normal heating operation mode, a normal cooling operation mode, a reverse defrosting operation mode, and a shift defrosting operation mode.
Heating mode of operation in general
The heating operation mode is not different from the common heating operation mode of the air conditioner.
In some embodiments, when the air conditioner is in a normal heating operation mode, referring to fig. 1, the air duct throttling devices 13-1 and 13-2 are opened, the throttling devices 15-1 and 15-2 are closed, the liquid duct throttling devices 10-1 and 10-2 are opened, and the outdoor fans 12-1 and 12-2 are opened in the outdoor unit module a/a'.
In some embodiments, if there is only one outdoor fan F in the outdoor unit module a/a' that is common to the outdoor heat exchangers 11-1 and 11-2, the outdoor fan F is turned on. The four-way valve is electrified and reversed to enable the refrigerant D and the refrigerant E to be communicated and the refrigerant C and the refrigerant S to be communicated, the compressor 1 compresses low-temperature and low-pressure refrigerant into a high-temperature and high-pressure state, the refrigerant discharged from the compressor 1 enters the indoor heat exchangers 5-1 to 5-4 through the gas side stop valve 3 and the first extension pipe 4 through the refrigerant D and the refrigerant E, the refrigerant is condensed and releases heat after heat exchange inside the indoor heat exchangers 5-1 to 5-4 to become liquid refrigerant, the refrigerant then passes through the indoor machine side throttling devices 7-1 to 7-4, the second extension pipe 8 and the liquid side stop valve 9, enters the liquid pipe throttling devices 10-1 and 10-2 to be throttled to low-temperature and low-pressure gas-liquid two states, then enters the outdoor heat exchangers 11-1 and 11-2 to be evaporated and absorbed to become gaseous state, the refrigerant discharged from the outdoor heat exchangers 11-1 and 11-2 enters the gas-liquid separator 14, finally, the refrigerant is sucked into the compressor 1 to be compressed, and a heating cycle is completed.
The refrigerant flow in the normal heating operation mode is in the direction indicated by the arrow in fig. 1.
Throughout the normal heating operation mode, the outdoor fans 12-1 and 12-2 are always on or the outdoor fan F is always on.
Normal cooling mode of operation
The normal cooling operation mode is the same as the normal cooling operation mode of the air conditioner.
In some embodiments, when the air conditioner is in a normal cooling operation mode, referring to fig. 1, the air pipe throttles 13-1 and 13-2 in the outdoor unit module a/a' are both open, the throttles 15-1 and 15-2 are both closed, the liquid pipe throttles 10-1 and 10-2 are both open, and the outdoor fans 12-1 and 12-2 are both open.
In some embodiments, if there is only one outdoor fan F in the outdoor unit module a/a' that is common to the outdoor heat exchangers 11-1 and 11-2, the outdoor fan F is turned on.
The four-way valve is powered off, the default D and C are communicated, the default E and S are communicated, the compressor 1 compresses a low-temperature and low-pressure refrigerant into a high-temperature and high-pressure state, the refrigerant discharged by the compressor 1 is throttled by the D and C through the air pipe throttling devices 13-1 and 13-2 and then enters the outdoor heat exchangers 11-1 and 11-2, the refrigerant is condensed and releases heat after heat exchange of the outdoor heat exchangers 11-1 and 11-2 to become a liquid refrigerant, then the refrigerant passes through the liquid pipe throttling devices 10-1 and 10-2, the liquid side stop valve 9 and the second extension pipe 8, enters the indoor heat exchangers 5-1 to 5-4 to be evaporated and absorbed in and become a gas state, the refrigerant discharged from the indoor heat exchangers 5-1 to 5-4 passes through the first extension pipe 4, the gas side stop valve 3 and the E and S of the four-way valve, enters, the refrigeration cycle is completed.
Throughout the normal cooling operation mode, the outdoor fans 12-1 and 12-2 are always on or the outdoor fan F is always on.
Reverse defrost mode of operation
When the control device of the air conditioner detects and judges that the outdoor heat exchanger 11-1 and/or 11-2 needs defrosting, the compressor 1 firstly reduces the frequency or directly stops, and the indoor fans 6-1 to 6-4 and the outdoor fans 12-1 and 12-2 (or the outdoor fan F) stop running.
Then, the four-way valve is powered off and reversed, the compressor 1 is started, the outdoor heat exchangers 11-1 and 11-2 are used as condensers to perform defrosting, namely heating of all indoor units is stopped, and defrosting is performed on all the outdoor heat exchangers 11-1 and 11-2.
After defrosting is completed, the compressor 1 is stopped; then, the four-way valve is powered on and switched over, the compressor 1 is restarted, the outdoor fans 112-1 and 12-2 are restarted (or the outdoor fan F is restarted), the indoor fans 6-1 to 6-4 are operated according to the cold air preventing program, and the air conditioner is restarted to enter the normal heating operation mode.
The cold air prevention program can operate as follows: the actions of the indoor fans 6-1 to 6-4 are controlled by detecting the temperature of the indoor coil, for example, when the temperature of the indoor coil is detected to reach a first temperature (for example, 20 ℃), the indoor fans 6-1 to 6-4 are controlled to start to operate by breeze, and the rotating speed of the indoor fans is controlled to be increased gradually according to the temperature of the indoor coil; when the indoor coil temperature reaches a second temperature (e.g., 38 ℃), the rotation speed of the indoor fans 6-1 to 6-4 is controlled to operate at the set rotation speed.
The reverse defrosting operation mode has the advantage of defrosting cleanly, but because the heating operation is stopped during defrosting, the indoor temperature is obviously reduced, thereby influencing the use comfort of users.
Alternate defrost mode of operation
The alternate defrosting operation mode is operated under the conditions that the outdoor heat exchanger needs to be defrosted and the indoor unit still needs to have certain heating capacity, so that the air conditioner can keep heating continuously while the outdoor heat exchanger to be defrosted is defrosted, the indoor temperature fluctuation is reduced, and the heating comfort of a user is enhanced.
When a plurality of outdoor heat exchangers exist in the outdoor unit modules A and A' for defrosting, the plurality of outdoor heat exchangers to be defrosted execute a rotation defrosting operation mode.
In some embodiments, referring to fig. 1 to 3, the outdoor heat exchangers 11-1 and 11-2 in the outdoor unit module a are described as requiring defrosting.
S1: the process begins.
S2: the air conditioner performs a general heating operation mode.
S3: and judging whether the outdoor heat exchangers 11-1 and 11-2 meet defrosting conditions, if so, entering S4, and if not, continuing to execute a normal heating operation mode of S2.
The defrosting condition can be judged according to the existing judgment basis, for example, the running time of the compressor 1 and the temperature difference between the ambient temperature and the outdoor unit coil temperature are taken as the criterion.
S4: and judging whether the defrosting time T is larger than a first preset defrosting time T1, if so, performing a reverse defrosting operation mode in S5, and if not, performing a rotation defrosting operation mode in S9 on the outdoor heat exchangers to be defrosted.
The defrosting time t is initialized to 0 when the air conditioner is operated for the first time after being installed. And then, after defrosting (including executing a reverse defrosting operation mode and executing a rotation defrosting operation mode) is performed on the outdoor heat exchanger to be defrosted each time and defrosting is completed, the defrosting time t is updated.
For the reverse defrosting mode, the outdoor heat exchangers 11-1 and 11-2 in the outdoor unit module a perform defrosting simultaneously, and the time after the defrosting of the outdoor heat exchangers 11-1 and 11-2 is finished is taken as defrosting time t.
For the alternate defrosting operation mode, the outdoor heat exchangers 11-1 and 11-2 in the outdoor unit module a alternately defrost, the time after the outdoor heat exchanger 11-1 finishes defrosting is taken as t1, the time after the outdoor heat exchanger 11-2 finishes defrosting is taken as t2, and the maximum value between t1 and t2 is selected as the defrosting time t.
And determining whether the defrosting operation mode to be executed next time by the air conditioner is the reverse defrosting operation mode or the alternate defrosting operation mode by judging the relation between the defrosting time T and the first preset time T1.
S5: the reverse defrosting operation mode is performed and proceeds to S6.
The defrost process for this reverse defrost mode of operation is described above.
S6: and judging whether defrosting is finished or not.
The defrosting end condition here may be determined whether the defrosting time T reaches a second preset time T2, or whether the outdoor unit coil temperature T is greater than or equal to a set temperature D1; and if one of the two conditions is met, indicating that the defrosting is finished, otherwise, continuing to judge.
Needless to say, the defrosting end condition is not limited to this, and the degree of supercooling on the refrigerant outflow side of the outdoor heat exchanger may be used, for example, for determination.
S7: if the defrosting is finished, recording the defrosting time period t', and proceeding to S8; if not, the reverse defrosting operation mode in S5 is continuously performed.
For the case of only one outdoor unit module a, the defrosting time period t 'is a first value t 1'.
For the case of two outdoor unit modules a and a ', the defrost time t' has two values, which are denoted as a first value t1 'and a second value t 2'.
S8: and acquiring the defrosting time t according to the defrosting time.
In S8, the defrosting time t = t1' for the case of only one outdoor unit module a.
For the case of two outdoor unit modules a and a ', the defrosting time t is the greater of t1' and t2 '.
S9: and sequentially executing a rotation defrosting operation mode aiming at the plurality of defrosting heat exchangers.
The outdoor heat exchangers 11-1 and 11-2 are alternately defrosted according to the frosting amount of the outdoor heat exchangers 11-1 and 11-2 to be defrosted (i.e., defrosting heat exchangers).
The outdoor heat exchangers 11-1 and 11-2 can be sequentially defrosted according to the sequence of the frost formation amount from large to small.
The determination of the frosting amount may be performed by detecting an index indicative of the frosting amount by a detecting means (not shown), such as at least one of the heating capacity of the outdoor heat exchangers 11-1 and 11-2, the evaporation temperature of the refrigerant, the indoor unit blow-out temperature, the liquid pipe temperature of the outdoor heat exchanger, and the like, and predicting the frosting amount of the outdoor heat exchangers 11-2 and 11-2 according to the change of the detection value.
For example, the frost formation amount is determined by the liquid pipe temperature of the outdoor heat exchanger, and the frost formation amount increases as the liquid pipe temperature of the outdoor heat exchanger decreases.
Assuming that the frosting amount of the outdoor heat exchanger 11-2 is greater than that of the outdoor heat exchanger 11-1, the outdoor heat exchanger 11-2 should be defrosted first to avoid that the normal operation of the outdoor heat exchanger 11-2 is affected by excessive frosting. The outdoor heat exchanger 11-1 is in the normal heating operation mode at this time.
That is, the outdoor heat exchanger 11-2 is performed as a defrosting heat exchanger, and the outdoor heat exchanger 11-1 is performed as an evaporator.
After the defrosting of the outdoor heat exchanger 11-2 is completed and the normal heating operation mode is entered, the outdoor heat exchanger 11-1 is defrosted.
That is, the switching of the outdoor heat exchanger 11-1 is performed as a defrosting heat exchanger, and the outdoor heat exchanger 11-2 is performed as an evaporator.
The process of defrosting by each defrosting heat exchanger is described with reference to fig. 3.
In the case where the number of outdoor heat exchangers is the same as the number of outdoor fans and corresponds one to one, refer to fig. 3, which shows a flowchart when each defrosting heat exchanger is in the alternate defrosting operation mode. S91: the flow path switching device 2 is controlled to be opened (i.e., energized), the defrost circuit is controlled to communicate the refrigerant discharged from the compressor 1 with the defrost heat exchanger, the pipe throttle device communicating with the defrost heat exchanger is cut off and the outdoor fan is turned off, and the remaining outdoor heat exchanger is implemented as an evaporator.
The outdoor heat exchanger 11-2 in the outdoor unit module a is used as a defrosting heat exchanger to perform a defrosting process, and the outdoor heat exchanger 11-1 is used as an evaporator to perform a normal heating operation process.
And keeping the four-way valve in an electrified and opened state, controlling the throttling device 15-2' on the defrosting branch 15-2 to be opened, closing the outdoor fan 12-2, closing the liquid pipe throttling device 10-2, and keeping the rest devices in the same state as the devices in the normal heating operation mode.
Referring to fig. 1 again, solid arrows indicate a refrigerant flow direction of the outdoor heat exchanger 11-1 in the normal heating operation mode, and dotted arrows indicate a refrigerant flow direction of the outdoor heat exchanger 11-2 in the defrosting process.
When entering the alternate defrosting operation mode, the compressor 1 compresses a low-temperature and low-pressure refrigerant into a high-temperature and high-pressure state, and discharges the high-temperature and high-pressure refrigerant.
A part of high-temperature and high-pressure refrigerant enters the indoor heat exchangers 5-1 to 5-4 through the D and E, the gas side stop valve 3 and the first extension pipe 4, the refrigerant is condensed and releases heat after heat exchange in the indoor heat exchangers 5-1 to 5-4 to become liquid refrigerant, then the refrigerant passes through the indoor machine side throttling devices 7-1 to 7-4, the second extension pipe 8 and the liquid side stop valve 9, enters the liquid pipe throttling device 10-1 to be throttled to low-temperature and low-pressure gas-liquid two states, then enters the outdoor heat exchanger 11-1 to be evaporated and absorbed to become gas, the refrigerant coming out of the outdoor heat exchanger 11-1 enters the gas-liquid separator 14 through the C and S after being throttled by the gas pipe throttling device 13-1, and finally is sucked into the compressor 1 to be compressed.
The other part of the high-temperature and high-pressure refrigerant is throttled to a proper pressure (such as 0.8MPa to 1.0 MPa) by the throttling device 15-2 on the defrosting branch 15-2', then enters the outdoor heat exchanger 11-2 to release heat and defrost, flows through the air pipe throttling device 13-2, is converged with the refrigerant from the outdoor heat exchanger 11-1, passes through C and S of the four-way valve, enters the gas-liquid separator 14, and is finally sucked into the compressor 1 to be compressed.
When the outdoor heat exchanger 11-2 is defrosted, the outdoor fan 12-2 is turned off and the outdoor fan 12-1 is still turned on to dissipate heat, and the first wind field where the outdoor heat exchanger 11-2 is located and the second wind field where the outdoor heat exchanger 12-1 is located are separated by the separating device 16, so that the first wind field is not affected even if the outdoor fan 12-1 is still running.
Therefore, the situation that when the outdoor heat exchanger 11-2 is defrosted, the surface of the outdoor heat exchanger is blown by wind is effectively avoided, the situation that the outdoor temperature is low, the defrosting cannot be effectively carried out due to overlarge condensation load is further prevented, and uninterrupted heating of a full-temperature area can be realized.
In addition, when the outdoor fan 12-2 stops running (i.e. the outdoor heat exchanger 11-2 is defrosting), the rotating speed of the outdoor fan 12-1 can be properly increased, the heating effect is further enhanced, the indoor temperature fluctuation is reduced, and the heating capacity of the air conditioner and the heating comfort of users are greatly improved.
S92: and judging whether defrosting is finished or not.
As the defrosting end condition, it may be determined whether the defrosting time period T1 reaches a third preset time T3, or whether the air pipe temperature Tg of the outdoor heat exchanger 11-2 is greater than or equal to the set temperature Tm and the suction pressure Ps of the compressor 1 is greater than or equal to the set pressure Po; and if one of the two conditions is met, indicating that the defrosting is finished, otherwise, continuing to judge.
Needless to say, the defrosting end condition is not limited to this, and the degree of supercooling on the refrigerant outflow side of the outdoor heat exchanger 11-2 may be used, for example, for determination.
S93: recording the defrosting time t' after defrosting is finished; if not, execution continues with S91.
For the case of only one outdoor unit module a, the defrosting time period t ' has two times t1' and t2 '.
For the case of two outdoor unit modules a and a ', the defrost time t' has four values, which are denoted as t1', t2', t3 'and t 4'.
After the outdoor heat exchanger 11-2 finishes defrosting, the defrosting process is exited, the defrosting time period t1' is recorded, and then the normal heating operation process is entered.
The outdoor heat exchanger 11-2 exits the defrosting process and enters a normal heating operation process, which specifically comprises the following steps:
(1) controlling the throttle device 15-2' on the defrosting branch 15-2 to close;
(2) turning on the outdoor fan 12-2; and
(3) the pipe throttling means 10-2 is opened.
In order to control the degree of superheat at the outlet of the outdoor heat exchanger 11-2 when, for example, the outdoor heat exchanger 11-2 is in a normal heating operation after defrosting is finished and exits from the defrosting operation, it is necessary to open the outdoor fan 12-2 and the liquid pipe throttling device 10-2, close the throttling device 15-2, and maintain the air pipe throttling device 13-2 to a proper opening degree, so in this application, the air pipe throttling device 13-2 may be selected from an electronic expansion valve or a two-way thermostatic expansion valve.
Thereafter, the outdoor heat exchanger 11-1 serves as a defrosting heat exchanger to enter a defrosting process, and the outdoor heat exchanger 11-2 serves as an evaporator to maintain a general heating operation process.
And keeping the four-way valve in an open power-on state, controlling the throttle device 15-1 on the defrosting branch 15-1' to be opened, closing the outdoor fan 12-1, closing the liquid pipe throttle device 10-1, and keeping the rest devices in the same state as the normal heating operation mode.
The defrosting process of the outdoor heat exchanger 11-1 is referred to as the defrosting process of the outdoor heat exchanger 11-2.
When the outdoor heat exchanger 11-1 performs defrosting, the outdoor heat exchanger 11-2 performs a normal heating operation process.
When the outdoor heat exchanger 11-1 is defrosted, the outdoor fan 12-1 and the liquid pipe throttling device 10-1 are closed, and the throttling device 15-1 and the liquid pipe throttling device 13-1 are opened to proper opening degrees, so that the pressure and the refrigerant flow in the outdoor heat exchanger 11-1 are controlled.
Therefore, in the present application, the air pipe throttling device 13-1 and the throttling device 15-1 are selected from an electronic expansion valve or a two-way thermostatic expansion valve.
Similarly, the throttle device 15-2 is also selected to be an electronic expansion valve or a two-way thermostatic expansion valve.
After the outdoor heat exchanger 11-1 finishes defrosting, recording defrosting time t2', if not, continuing to execute the defrosting process.
In the case where only one outdoor fan F common to the outdoor heat exchangers 11-1 and 11-2 exists in the outdoor unit module a/a', the control of the outdoor fan at S91 and the control of the outdoor fan at the time of entering the normal heating operation process after exiting the rotating defrost operation process are different from the rotating defrost mode shown in fig. 3.
S91: the control flow path switching means 2 is opened, the defrost circuit is controlled to communicate the refrigerant discharged from the compressor 1 with the defrost heat exchanger, the pipe throttling means communicating with the defrost heat exchanger is cut off, and the partition means S is controlled to form a wind screen between the defrost heat exchanger and the outdoor fan F, and the remaining outdoor heat exchanger is implemented as an evaporator.
The outdoor heat exchanger 11-2 in the outdoor unit module a is used as a defrosting heat exchanger to perform a defrosting process, and the outdoor heat exchanger 11-1 is used as an evaporator to perform a normal heating operation process.
Keeping the four-way valve in an electrified and opened state, controlling the throttling device 15-2' on the defrosting branch 15-2 to be opened, opening the outdoor fan F and controlling the separating device S to form a wind screen between the outdoor heat exchanger 11-1 and the outdoor fan F (at the moment, the outdoor fan F supplies air to the outdoor heat exchanger 11-2), closing the liquid pipe throttling device 10-2, and keeping the other devices in the same state as the state in a normal heating operation mode.
The defrosting process performed by the defrosting heat exchanger is the same as the defrosting process described above, and is not described herein again, referring to fig. 1, the solid arrow indicates the refrigerant flow direction when the outdoor heat exchanger 11-1 is in the normal heating operation mode, and the dotted arrow indicates the refrigerant flow direction when the outdoor heat exchanger 11-2 is in the defrosting process.
When the outdoor heat exchanger 11-2 is defrosted, the outdoor fan F is always turned on to keep the heat dissipation of the outdoor heat exchanger 11-1, but the separating device S separates the wind field generated by the outdoor fan F from the outdoor heat exchanger 11-2, so that the outdoor heat exchanger 11-2 is not affected even if the outdoor fan F is still operated.
Therefore, the situation that when the outdoor heat exchanger 11-2 is defrosted, the surface of the outdoor heat exchanger is blown by wind is effectively avoided, the situation that the outdoor temperature is low, the defrosting cannot be effectively carried out due to overlarge condensation load is further prevented, and uninterrupted heating of a full-temperature area can be realized.
In addition, when a defrosting controller which is defrosting exists in a certain outdoor unit module, the rotating speed of an outdoor fan F can be increased, the heating effect is further enhanced, the indoor temperature fluctuation is reduced, and the heating capacity of the air conditioner and the heating comfort of users are greatly improved.
The outdoor heat exchanger 11-2 exits the defrosting process and enters a normal heating operation process, which specifically comprises the following steps:
(1) controlling the throttle device 15-2' on the defrosting branch 15-2 to close;
(2) controlling the separation device S to enable the outdoor fan F to supply air to the outdoor heat exchanger 11-2; and
(3) the pipe throttling means 10-2 is opened.
Thereafter, the outdoor heat exchanger 11-1 serves as a defrosting heat exchanger to enter a defrosting process, and the outdoor heat exchanger 11-2 serves as an evaporator to maintain a general heating operation process. Referring to the added dotted frame portion in fig. 1, when there is more than one outdoor unit module, for example, it is divided into outdoor unit modules a and a'.
When all the outdoor heat exchangers in the outdoor unit modules A and A ' (namely the outdoor heat exchangers 11-1 and 11-2 of the outdoor unit module A and the outdoor heat exchangers 11-1 and 11-2 of the outdoor unit module A ') are defrosted, defrosting is sequentially carried out according to the frosting amount, one outdoor heat exchanger is used as a defrosting heat exchanger each time, and the other three outdoor heat exchangers are used as evaporators, compared with the case that a single outdoor unit module A or A ' exists, the defrosting heat exchanger is reduced to 1/4 from 1/2, and the influence of defrosting on indoor temperature fluctuation is further reduced.
And because the total amount of the defrosting heat exchangers occupying the outdoor heat exchangers is small, the heating time is properly shortened on the basis of original control, the defrosting frequency is increased, the indoor temperature cannot cause obvious fluctuation, and the frosting amount and the defrosting time can be reduced, so that the effect of quasi-attenuation-free heating is achieved, and the uninterrupted heating under a full-temperature area is realized.
As shown in fig. 4, it shows an indoor temperature variation curve (shown by a solid line in fig. 4) in the mode of performing the alternate defrosting operation when the outdoor unit modules a and a 'exist and an indoor temperature variation curve (shown by a dotted line in fig. 4) in the mode of performing the alternate defrosting operation when the single outdoor unit module a or a' exists, and it can be known that the scheme provided by the present application can ensure that the full series of products can provide the best experience for the user under the full working conditions.
Of course, the number of outdoor unit modules is not limited to one or two, and the air conditioner may include more than two outdoor unit modules.
S10: and acquiring the defrosting time t according to the defrosting time t'.
In S10, the defrosting time t is the larger of t1 'and t2' for the case of only one outdoor unit module a.
For the case of two outdoor unit modules a and a ', the defrosting time t' is the maximum value among t1', t2', t3 'and t 4'.
Separation device I
In the present application, for example, with respect to the outdoor unit module a, the outdoor heat exchanger (hereinafter, referred to as a first heat exchanger) 11-1 and its outdoor fan (hereinafter, referred to as a first fan) 12-1 form a first wind field; the outdoor heat exchanger 11-2 (hereinafter, referred to as a second heat exchanger) and its outdoor fan (hereinafter, referred to as a second fan) 12-2 form a second wind field.
The separating device 16 is used for separating the first wind field and the second wind field to make them independent, i.e. the wind fields do not interfere with each other.
Of course, when the outdoor unit module a has an outdoor heat exchanger, there are more than two wind fields, and the separating device 16 is used to separate adjacent wind fields.
The partition 16 may be any structural component that achieves wind farm isolation.
Reference is made to fig. 5 and 6 which show a separating device 16 for separating a first wind park from a second wind park.
In order to establish the first and second independent wind fields, the outdoor unit module a further includes a cabinet 1'.
The cabinet 1 'may include a top cover, a front panel, a rear panel, side panels, and a bottom panel 11'.
The partition device 16 is located in the casing 1 'and divides the internal space of the casing 1' into two independent air ducts, namely a first air duct 18 and a second air duct 19. The first fan 12-1 and the first heat exchanger 11-1 are positioned in the first air duct 18, and the second fan 12-2 and the second heat exchanger 11-2 are positioned in the second air duct 19.
The first heat exchanger 11-1, the first air duct 18 and the first fan 12-1 form a first air duct system, and the second heat exchanger 11-2, the second air duct 19 and the second fan 12-2 form a second air duct system. The first and second air duct systems may operate independently of each other.
Because the first air duct system and the second air duct system are separated by the separating device 16, the respective wind fields of the two systems cannot be influenced when the two systems operate, the two systems operate simultaneously when the two systems operate normally, and when the air conditioner operates to perform heating and defrosting, the first air duct system and the second air duct system can adopt an alternate defrosting mode.
For example, when the first air duct system is in a defrosting state, the second air duct system continues heating operation; when the second air duct system is in the defrosting state, the first air duct system continues to perform heating operation, so that the central air conditioner can perform continuous and uninterrupted heating, the problem that heating cannot be continuously performed due to the fact that heating must be stopped when the air conditioner performs heating and defrosting in the related art is avoided, and the heating effect and the user experience can be improved.
Fig. 6 is a perspective view of a spacer 16 according to an embodiment of the present disclosure.
The partition device 16 includes a partition plate 161, the partition plate 161 is perpendicular to the bottom plate 11', and partitions the enclosure 1' into a left chamber and a right chamber, the left chamber is defined as a first air duct 18, the right chamber is defined as a second air duct 19, the first heat exchanger 11-1 is located in the first air duct 18 on the left side, the second heat exchanger 11-2 is located in the second air duct 19 on the right side, the first fan 12-1 corresponds to the first air duct 18, and the second fan 12-2 corresponds to the second air duct 19.
In some embodiments of the present disclosure, the partition 16 may further include a connection beam assembly 162, and the connection beam assembly 162 may be used to securely connect the partition 161 and the casing 1', and the connection may be in the form of a screw connection or a screw and snap fit.
Separating device II
Referring to fig. 7, there is shown a schematic structural view of the partitioning device S in the case where there is two outdoor heat exchangers sharing one outdoor fan F.
The structure of the partitioning device S in the outdoor unit module a will be described as an example.
And a partition device S disposed in the casing of the outdoor unit module a, including a driving module S1, an extended guide portion, and a telescopically extendable wind shielding portion S2, wherein the driving module is controlled by the control device and drives the wind shielding portion S2 to move along the extended guide portion, so that the wind shielding portion S2 selectively forms a wind screen between one of the two outdoor heat exchangers 11-1 and 11-2 and the outdoor fan F.
After the wind shielding part S2 is unfolded, the inside of the cabinet includes:
the air supply area is internally provided with an outdoor fan F and an outdoor heat exchanger for heating; the outdoor heat exchanger in the air supply area is used as an evaporator to ensure the normal heating operation mode of the air conditioner;
the air insulation area is internally provided with an outdoor heat exchanger for defrosting; the outdoor heat exchanger in the wind isolation area shields the wind generated by the outdoor fan through the wind shielding part S2, and serves as a condenser during the wind isolation period to realize defrosting through a high-temperature high-pressure liquid refrigerant.
The partition S further includes a receiving portion S3 provided between the two outdoor heat exchangers 11-1 and 11-2 to receive the wind shielding portion S2. One side of the wind shielding part S2 is fixed in the accommodating part S3, and the other side can move from bottom to top along the extending guide part.
The extension guide includes a first guide rail S4 and a second guide rail S5.
A straight line section of the first guide rail S4 is located at one side between the two outdoor heat exchangers 11-1 and 11-2, and a bent section of the first guide rail S4 extends around the top of one of the outdoor heat exchangers 11-1 to an inner wall of the cabinet, wherein one end of the straight line section of the first guide rail S4 is connected to one side of the opening of the accommodating portion S3, the other end of the straight line section of the first guide rail S4 is connected to one end of the bent section of the first guide rail S4, and the other end of the bent section of the first guide rail S4 is connected to an inner wall of the cabinet.
A straight line section of the second guide rail S5 is located at the other side between the two outdoor heat exchangers 11-1 and 11-2, and a bent section of the second guide rail S5 extends around the top of the other outdoor heat exchanger 1-2 to the other inner wall of the cabinet, wherein one end of the straight line section of the second guide rail S5 is connected to the other side at the opening of the accommodating portion S3, the other end of the straight line section of the second guide rail S5 is connected to one end of the bent section of the second guide rail S5, and the other end of the bent section of the second guide rail S5 is connected to the other inner wall of the cabinet.
The telescopic extension movement process of the wind shielding part S2 is guided by providing two guide rails S4 and S5, so that the wind shielding part S2 can be controlled to move along a preset track.
The partition S further includes a reversing module S6, which is disposed between the accommodating part S3 and the extended guide part, and is controlled by the control device to guide the wind shielding part S2 to the first guide rail S3 or the second guide rail S5.
The reversing module S6 may enable the wind screen S2 to be selectively deployed between the two rails S4 and S5, leading onto the first rail S4 or the second rail S5. In some embodiments, the commutation module S6 may be of the electromagnetic attraction type or the mechanical commutation type.
The structure of the partitions 16 and S as described above is merely an exemplary solution, and all the structural modifications that divide the defrosting heat exchanger from other outdoor heat exchangers as evaporators into the wind field when the defrosting heat exchanger performs defrosting belong to the scope of the present invention.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An air conditioner, comprising:
an indoor unit;
an outdoor unit module, the outdoor unit module comprising:
a machine shell, a first cover plate and a second cover plate,
the compressor is arranged in the shell;
a flow path switching device for switching a flow path of the refrigerant discharged from the compressor;
a plurality of outdoor heat exchangers arranged in parallel;
a plurality of liquid pipe throttles each connecting the indoor unit and the outdoor heat exchanger;
the outdoor fans respectively correspond to the outdoor heat exchangers and form a wind field with the corresponding outdoor heat exchangers;
a defrosting circuit that branches a part of the refrigerant discharged from the compressor and selects one of the plurality of outdoor heat exchangers to allow the refrigerant to flow therein;
a separation device for separating adjacent wind farms;
the separating device is arranged in the casing and divides the casing into a plurality of air channels, and each air channel is internally provided with an outdoor heat exchanger in the outdoor unit and an outdoor fan corresponding to the outdoor heat exchanger;
and a control device for controlling the flow path switching devices, the liquid pipe throttles, the outdoor fans and the defrosting circuits.
2. An air conditioner according to claim 1, said control means comprising: when the plurality of outdoor heat exchangers need defrosting, the control device alternately defrosts the outdoor heat exchangers to be defrosted;
when the defrosting is performed by turns, the air conditioner controls the flow path switching device to be opened, controls the defrosting loop to enable the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger to be defrosted, cuts off the liquid pipe throttling device communicated with the outdoor heat exchanger to be defrosted, and closes the outdoor fan corresponding to the outdoor heat exchanger to be defrosted, so that the outdoor heat exchanger to be defrosted is operated as the defrosting heat exchanger, and the rest outdoor heat exchangers are operated as the evaporators.
3. An air conditioner, comprising:
an indoor unit;
outdoor unit module, each outdoor unit module includes:
a compressor;
a flow path switching device for switching a flow path of the refrigerant discharged from the compressor;
a plurality of outdoor heat exchangers arranged in parallel;
a plurality of liquid pipe throttles each connecting the indoor unit and the outdoor heat exchanger;
at least one outdoor fan, the number of which is less than the number of the outdoor heat exchangers;
a defrosting circuit that branches a part of the refrigerant discharged from the compressor and selects one of the two outdoor heat exchangers to allow the refrigerant to flow therein;
the separating device is used for selectively enabling a wind screen to be formed between any outdoor heat exchanger and the outdoor fan;
a control device for controlling each flow path switching device, each liquid pipe throttling device, each outdoor fan, each defrosting circuit and each separating device;
when the plurality of outdoor heat exchangers need defrosting, the control device alternately defrosts the outdoor heat exchangers to be defrosted;
when the defrosting is performed by turns, the air conditioner controls the flow path switching device to be opened, controls the defrosting loop to enable the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger to be defrosted, cuts off the liquid pipe throttling device communicated with the outdoor heat exchanger to be defrosted, and controls the separating device to form an air screen between the outdoor heat exchanger to be defrosted and the outdoor fan, so that the outdoor heat exchanger to be defrosted is operated as a defrosting heat exchanger, and the rest outdoor heat exchangers are operated as evaporators.
4. The air conditioner as claimed in claim 2 or 3, wherein the defrost circuit comprises:
a plurality of defrost branches respectively corresponding to the plurality of outdoor heat exchangers in each outdoor unit module;
and the plurality of throttling devices are respectively and correspondingly arranged on each defrosting branch and are controlled by the control device.
5. The air conditioner according to claim 1, wherein the control device is configured to:
when the outdoor heat exchangers in each outdoor unit module are defrosting, the rotating speed of outdoor fans corresponding to the other outdoor heat exchangers which are not defrosting in the outdoor unit module is increased.
6. The air conditioner according to claim 1, wherein the control device is configured to:
when the outdoor heat exchanger to be defrosted is defrosted, if the first preset defrosting time is reached, or
And if the temperature of the air pipe of the outdoor heat exchanger to be defrosted is greater than or equal to a first preset temperature value and the suction pressure of the compressor is greater than or equal to a first set pressure value, the outdoor heat exchanger to be defrosted exits the defrosting process and enters a normal heating operation process.
7. The air conditioner according to claim 6, wherein the outdoor heat exchanger to be defrosted exits the defrosting process and enters a normal heating operation process, and specifically comprises:
opening an outdoor fan corresponding to the outdoor heat exchanger;
controlling to disconnect a defrost circuit that communicates refrigerant discharged from the compressor with the outdoor heat exchanger;
and controlling to open a liquid pipe throttling device communicated with the outdoor heat exchanger.
8. The air conditioner as claimed in claim 6, wherein when at least one of the respective completion times corresponding to the completion of the rotation of defrosting by all the outdoor heat exchangers to be defrosted reaches a second preset defrosting time, the reverse defrosting operation mode is selected as a mode of a next defrosting operation.
9. The air conditioner according to claim 3, wherein the control device is configured to:
when the outdoor heat exchanger to be defrosted is defrosted, if the first preset defrosting time is reached, or
If the temperature of the air pipe of the outdoor heat exchanger to be defrosted is greater than or equal to a first temperature preset value and the suction pressure of the compressor is greater than or equal to a first pressure set value, the outdoor heat exchanger to be defrosted quits the defrosting process, the separating device is controlled to enable the outdoor fan to supply air to the outdoor heat exchanger, the defrosting loop which enables the refrigerant discharged by the compressor to be communicated with the outdoor heat exchanger is controlled to be disconnected, and the liquid pipe throttling device communicated with the outdoor heat exchanger is opened.
10. The air conditioner according to claim 2 or 3, further comprising:
a detection device for detecting the amount of frost formation of the outdoor heat exchanger;
and the control device performs alternate defrosting according to the frosting amount of the outdoor heat exchangers to be defrosted.
CN202010523966.9A 2020-06-10 2020-06-10 air conditioner Active CN111664549B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202010523966.9A CN111664549B (en) 2020-06-10 2020-06-10 air conditioner
PCT/CN2021/098800 WO2021249372A1 (en) 2020-06-10 2021-06-08 Air conditioner
US18/063,204 US20230107874A1 (en) 2020-06-10 2022-12-08 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010523966.9A CN111664549B (en) 2020-06-10 2020-06-10 air conditioner

Publications (2)

Publication Number Publication Date
CN111664549A true CN111664549A (en) 2020-09-15
CN111664549B CN111664549B (en) 2023-09-12

Family

ID=72386603

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010523966.9A Active CN111664549B (en) 2020-06-10 2020-06-10 air conditioner

Country Status (1)

Country Link
CN (1) CN111664549B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112444003A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444000A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443996A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443998A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443999A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444001A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444002A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443997A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112539521A (en) * 2020-12-21 2021-03-23 珠海格力电器股份有限公司 Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof
CN112880049A (en) * 2021-02-22 2021-06-01 青岛海信日立空调系统有限公司 Air conditioning system
CN113294895A (en) * 2021-05-31 2021-08-24 青岛海信日立空调系统有限公司 Cloud air conditioner outdoor unit, cloud multi-connected air conditioner outdoor unit and control method thereof
CN113587212A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 One-driving-two air conditioner outdoor unit structure, air conditioner and control method thereof
WO2021249372A1 (en) * 2020-06-10 2021-12-16 青岛海信日立空调系统有限公司 Air conditioner
CN114484741A (en) * 2022-01-29 2022-05-13 青岛海尔空调电子有限公司 Defrosting control method for air conditioning system and air conditioning system
EP4040056A1 (en) * 2021-02-09 2022-08-10 Daikin Europe N.V. Heat-source side unit of a heat pump system with a refrigerant circuit and method for defrosting thereof
CN114992799A (en) * 2022-05-05 2022-09-02 青岛海尔空调电子有限公司 Air conditioner outdoor unit and control method of air conditioner
WO2024037059A1 (en) * 2022-08-17 2024-02-22 广东美的制冷设备有限公司 Multi-split air conditioning system control method, controller, air conditioning system, and medium

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1089753A (en) * 1996-09-13 1998-04-10 Hitachi Air Conditioning & Refrig Co Ltd Ventilation type air heat source air conditioner
CN101469926A (en) * 2007-12-29 2009-07-01 苏州三星电子有限公司 Improved air conditioner defrosting system and its control method
JP2011144996A (en) * 2010-01-14 2011-07-28 Mitsubishi Heavy Ind Ltd Air conditioner
US20120125033A1 (en) * 2009-07-28 2012-05-24 Toshiba Carrier Corporation Heat source unit
CN202973694U (en) * 2012-12-17 2013-06-05 广州科力新能源有限公司 Double-fin double-fan hot pump system capable of defrosting in complementary mode
JP2016041988A (en) * 2014-08-18 2016-03-31 株式会社クボタ Heat pump type air-conditioner
CN106642403A (en) * 2017-02-23 2017-05-10 珠海格力电器股份有限公司 Outdoor unit of air conditioner and air conditioning system
CN107709900A (en) * 2015-07-06 2018-02-16 三菱电机株式会社 Refrigerating circulatory device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1089753A (en) * 1996-09-13 1998-04-10 Hitachi Air Conditioning & Refrig Co Ltd Ventilation type air heat source air conditioner
CN101469926A (en) * 2007-12-29 2009-07-01 苏州三星电子有限公司 Improved air conditioner defrosting system and its control method
US20120125033A1 (en) * 2009-07-28 2012-05-24 Toshiba Carrier Corporation Heat source unit
JP2011144996A (en) * 2010-01-14 2011-07-28 Mitsubishi Heavy Ind Ltd Air conditioner
CN202973694U (en) * 2012-12-17 2013-06-05 广州科力新能源有限公司 Double-fin double-fan hot pump system capable of defrosting in complementary mode
JP2016041988A (en) * 2014-08-18 2016-03-31 株式会社クボタ Heat pump type air-conditioner
CN107709900A (en) * 2015-07-06 2018-02-16 三菱电机株式会社 Refrigerating circulatory device
CN106642403A (en) * 2017-02-23 2017-05-10 珠海格力电器股份有限公司 Outdoor unit of air conditioner and air conditioning system

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021249372A1 (en) * 2020-06-10 2021-12-16 青岛海信日立空调系统有限公司 Air conditioner
WO2022110771A1 (en) * 2020-11-30 2022-06-02 青岛海信日立空调系统有限公司 Air conditioner
CN112444000A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444003A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443999A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444001A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112444002A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443997A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443996A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112443998A (en) * 2020-11-30 2021-03-05 青岛海信日立空调系统有限公司 Air conditioner
CN112539521B (en) * 2020-12-21 2022-02-22 珠海格力电器股份有限公司 Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof
CN112539521A (en) * 2020-12-21 2021-03-23 珠海格力电器股份有限公司 Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof
EP4040056A1 (en) * 2021-02-09 2022-08-10 Daikin Europe N.V. Heat-source side unit of a heat pump system with a refrigerant circuit and method for defrosting thereof
CN112880049A (en) * 2021-02-22 2021-06-01 青岛海信日立空调系统有限公司 Air conditioning system
CN113294895A (en) * 2021-05-31 2021-08-24 青岛海信日立空调系统有限公司 Cloud air conditioner outdoor unit, cloud multi-connected air conditioner outdoor unit and control method thereof
WO2022252758A1 (en) * 2021-05-31 2022-12-08 青岛海信日立空调系统有限公司 Cloud outdoor air-conditioning unit, cloud multi-split outdoor air-conditioning unit and control method therefor
CN113587212A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 One-driving-two air conditioner outdoor unit structure, air conditioner and control method thereof
CN114484741A (en) * 2022-01-29 2022-05-13 青岛海尔空调电子有限公司 Defrosting control method for air conditioning system and air conditioning system
CN114992799A (en) * 2022-05-05 2022-09-02 青岛海尔空调电子有限公司 Air conditioner outdoor unit and control method of air conditioner
WO2024037059A1 (en) * 2022-08-17 2024-02-22 广东美的制冷设备有限公司 Multi-split air conditioning system control method, controller, air conditioning system, and medium

Also Published As

Publication number Publication date
CN111664549B (en) 2023-09-12

Similar Documents

Publication Publication Date Title
CN111664549B (en) air conditioner
JP6685409B2 (en) Air conditioner
KR100846266B1 (en) Air conditioner
JP3985394B2 (en) Refrigeration cycle equipment
EP1793179B1 (en) Multi-type air conditioner
CN213841110U (en) Air conditioner
JP2013011364A (en) Air conditioner
MXPA02006289A (en) Multi-type gas heat pump air conditioner.
CN213841111U (en) Air conditioner
CN112444000A (en) Air conditioner
CN112444001A (en) Air conditioner
CN113959010A (en) One-driving-multiple refrigerating and heating air conditioner
WO2022110761A1 (en) Air conditioner
CN112443997A (en) Air conditioner
KR102082881B1 (en) Multi-air conditioner for heating and cooling operations at the same time
JP2015117894A (en) Air conditioner outdoor unit
EP3686516B1 (en) Air conditioner
JP2011080733A (en) Air conditioner
KR101899220B1 (en) Air Conditioner
CN113776162A (en) Air conditioner
CN112444003A (en) Air conditioner
JP4023387B2 (en) Refrigeration equipment
CN112443998A (en) Air conditioner
CN112444002A (en) Air conditioner
CN114127493B (en) Air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant