WO2024230258A1 - 空调系统及其除霜控制方法 - Google Patents

空调系统及其除霜控制方法 Download PDF

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Publication number
WO2024230258A1
WO2024230258A1 PCT/CN2024/075353 CN2024075353W WO2024230258A1 WO 2024230258 A1 WO2024230258 A1 WO 2024230258A1 CN 2024075353 W CN2024075353 W CN 2024075353W WO 2024230258 A1 WO2024230258 A1 WO 2024230258A1
Authority
WO
WIPO (PCT)
Prior art keywords
conditioning system
air conditioning
defrost
air
outdoor unit
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.)
Pending
Application number
PCT/CN2024/075353
Other languages
English (en)
French (fr)
Inventor
刘心怡
邵宗臣
张恒
董辰
王江南
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
Priority claimed from CN202310506237.6A external-priority patent/CN118896325A/zh
Priority claimed from CN202310506368.4A external-priority patent/CN118896326A/zh
Application filed by Qingdao Hisense Hitachi Air Conditioning System Co Ltd filed Critical Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority to CN202480004588.XA priority Critical patent/CN120112757A/zh
Publication of WO2024230258A1 publication Critical patent/WO2024230258A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • F24F1/0003Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F25B41/40Fluid line arrangements
    • 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
    • F24F2110/50Air quality properties
    • F24F2110/65Concentration of specific substances or contaminants

Definitions

  • the present disclosure relates to the technical field of air conditioning, and in particular to an air conditioning system and a defrosting control method thereof.
  • the outdoor heat exchanger components When the air conditioning system is in heating operation, when the temperature and humidity of the external environment reach certain conditions, the outdoor heat exchanger components will frost, affecting the performance of the air conditioning system.
  • the refrigerant discharged by the compressor can be supplied to the outdoor heat exchanger components, so that the heat of the refrigerant can be used to defrost the outdoor heat exchanger components.
  • an air conditioning system comprising: an indoor unit and an outdoor unit.
  • the indoor unit comprises an indoor heat exchanger.
  • the outdoor unit comprises: a compressor, a first branch and an outdoor heat exchanger assembly.
  • the compressor comprises an air intake port and an air exhaust port.
  • the outdoor heat exchanger assembly comprises a first part and a second part, the first part being connected to the second part through the first branch.
  • an air conditioning system comprising a controller, an indoor heat exchanger and an outdoor unit.
  • the outdoor unit comprises: a compressor, a reversing assembly, an outdoor heat exchanger assembly, a fourth branch, a fifth branch, a first branch, a first on-off valve, a second on-off valve, a first throttle valve, a second throttle valve, a third throttle valve and a throttle assembly.
  • the compressor comprises an air intake port and an air exhaust port
  • the reversing assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to the air exhaust port, and the fourth valve port is connected to the air intake port.
  • the outdoor heat exchanger assembly comprises a first part and a second part, the first end of the first part is connected to the third valve port.
  • the first end of the fourth branch is connected to the air exhaust port, and the second end of the fourth branch is connected to the second end of the first part.
  • the first end of the fifth branch is connected to the air exhaust port, and the first end of the first branch is connected to the second end of the first part; one of the second end of the fifth branch and the second end of the first branch is connected to the second end of the second part, and the other is connected to the first end of the second part.
  • the first on-off valve is arranged on the fourth branch, the second on-off valve is arranged between the first end of the second part and the third valve port, the first throttle valve is arranged on the first branch, and the throttle assembly is arranged on the fifth branch.
  • the first end of the indoor heat exchanger is connected to the second valve port; the second throttle valve is arranged between the second end of the indoor heat exchanger and the second end of the first part, and the third throttle valve is arranged between the second end of the indoor heat exchanger and the second end of the second part.
  • the controller is electrically connected to the indoor heat exchanger and the outdoor unit, and is configured as follows: when the air-conditioning system is controlled to defrost the first part of the outdoor unit, the first valve port and the second valve port of the outdoor unit are controlled to be connected, the third valve port and the fourth valve port are controlled to be connected, the first on-off valve and the second on-off valve are controlled to be opened, the first throttle valve and the throttling assembly are fully closed, and the third throttle valve is controlled to be throttled; and, when the air-conditioning system is controlled to defrost the second part of the outdoor unit, the first valve port and the second valve port of the outdoor unit are controlled to be connected, the third valve port and the fourth valve port are controlled to be connected, the first throttle valve, the second throttle valve and the throttling assembly are controlled to be throttled, and the first on-off valve and the second on-off valve are controlled to be closed.
  • a defrost control method for an air-conditioning system satisfies one of the following: the defrost control method comprises: when the air-conditioning system operates in a heating mode, if the air-conditioning system satisfies a defrost condition, controlling the air-conditioning system to operate a first defrost mode to defrost the first part of the outdoor unit, wherein the defrost condition comprises the outdoor ambient temperature, the operating time of the air-conditioning system, and the temperature of the first part of the outdoor unit or the temperature of the second part of the outdoor unit; if the air-conditioning system has completed defrosting the first part of the outdoor unit, controlling the air-conditioning system to exit the first defrost mode and operate a second defrost mode to defrost the second part of the outdoor unit; if the air-conditioning system has completed defrosting the second part of the outdoor unit, controlling the air-conditioning system to exit the second
  • the defrost control method comprises: when the air-conditioning system operates in a heating mode, if the air-conditioning system meets a defrost condition, controlling the air-conditioning system to operate in a second defrost mode to defrost the second part of the outdoor unit, wherein the defrost condition comprises an outdoor ambient temperature, an operating time of the air-conditioning system, and a temperature of at least one of the first part or a temperature of at least one of the second part; if the air-conditioning system has completed defrosting the second part of the outdoor unit, controlling the air-conditioning system to exit the second defrost mode and operate in a first defrost mode to defrost the first part of the outdoor unit; if the air-conditioning system has completed defrosting the first part of the outdoor unit, The air conditioning system is controlled to exit the first defrost mode.
  • FIG1 is a schematic diagram of an air conditioning system according to some embodiments.
  • FIG2 is a schematic diagram of another air conditioning system provided according to some embodiments.
  • FIG3 is a schematic diagram of another air conditioning system according to some embodiments.
  • FIG4 is a schematic diagram of another air conditioning system according to some embodiments.
  • FIG5 is a schematic diagram of yet another air conditioning system provided according to some embodiments.
  • FIG6 is a schematic diagram of another air conditioning system according to some embodiments.
  • FIG7 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG8 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG9 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG10 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG11 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG12 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG13 is a schematic diagram of yet another air conditioning system provided according to some embodiments.
  • FIG14 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG15 is a schematic diagram of yet another air conditioning system according to some embodiments.
  • FIG16 is a schematic diagram of the air conditioning system shown in FIG4 when operating in a cooling mode
  • FIG17 is a schematic diagram of the air conditioning system shown in FIG5 when operating in a cooling mode
  • FIG18 is a schematic diagram of the air conditioning system shown in FIG4 when operating in a heating mode
  • FIG19 is a schematic diagram of the air conditioning system shown in FIG5 when operating in a heating mode
  • FIG20 is a schematic diagram of the air conditioning system shown in FIG4 when defrosting the first part
  • FIG21 is a schematic diagram of the air conditioning system shown in FIG5 when defrosting the first part
  • FIG22 is a schematic diagram of the air conditioning system shown in FIG4 when defrosting the second part
  • FIG23 is a schematic diagram of the air conditioning system shown in FIG5 when defrosting the second part
  • FIG24 is a flow chart of a defrost control method for an air conditioning system according to some embodiments of the present disclosure
  • FIG25 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG26 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG27 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG28 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG29 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG30 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG31 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG32 is a schematic diagram of another air conditioning system provided according to some embodiments of the present disclosure.
  • FIG33 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG34 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG35 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG36 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG37 is a flow chart of another defrost control method for an air conditioning system according to some embodiments of the present disclosure.
  • FIG. 38 is a flowchart of yet another defrost control method for an air-conditioning system according to some embodiments of the present disclosure.
  • first and second are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features.
  • plural means two or more.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium.
  • coupled indicates, for example, that two or more components are in direct physical or electrical contact.
  • coupled or “communicatively coupled” may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • the outdoor heat exchanger components When the air conditioning system is in heating operation, when the temperature and humidity of the external environment reach certain conditions, the outdoor heat exchanger components will frost, which will cause the heating performance and heating capacity of the air conditioning system to decrease, affecting the user experience. After frosting, the air conditioning system will start the defrost program to defrost the outdoor heat exchanger components.
  • defrosting there are two main ways to implement defrosting.
  • the air conditioning system uses a reverse defrosting method to defrost the outdoor heat exchanger assembly.
  • a reverse defrosting method By making the refrigerant in heating flow in reverse, the refrigerant discharged from the compressor is supplied to the outdoor heat exchanger assembly, and the heat of the compressor is used to defrost the outdoor heat exchanger assembly.
  • the air conditioning system stops heating the room, and the indoor heat exchanger is required to absorb some heat from the room, which reduces the indoor temperature, affects the indoor thermal comfort, and reduces the user experience.
  • the reverse defrosting method also requires changing the refrigerant flow direction, especially when switching to heating mode after defrosting.
  • the air conditioning system uses a bypass branch to defrost the outdoor heat exchanger assembly.
  • a bypass branch is provided in the compressor exhaust pipe, and the bypass branch is connected to the outdoor heat exchanger assembly intake pipe.
  • the heat source for defrosting in this method is only the compression power consumption of the compressor, the defrosting reliability is poor, and the defrosting time is long.
  • the indoor heating amount when the air-conditioning system is defrosting, the indoor heating amount will be reduced, affecting the thermal comfort of indoor users.
  • the present disclosure provides an air conditioning system, which can operate in a defrost-free mode.
  • frost formation of an outdoor heat exchanger component can be avoided, and the indoor heat exchanger can continue to heat the indoor space, so that the outdoor component does not need to be defrosted.
  • the air conditioning system provided by the present disclosure is described in detail below.
  • an air conditioning system 100 including an indoor unit 10, an outdoor unit 20 and a controller 40.
  • the indoor unit 10 includes an indoor heat exchanger 101
  • the outdoor unit 20 includes a compressor 21, an outdoor fan 22, an outdoor heat exchanger assembly 3 and a first branch 41.
  • the air conditioning system 100 may include one or more indoor units 10 and one or more outdoor units 20 .
  • the air conditioning system 100 includes two indoor units 10 and one outdoor unit 20.
  • the air conditioning system 100 includes one indoor unit 10 and two outdoor units 20.
  • the air conditioning system 100 includes a plurality of indoor units 10
  • the first ends of the plurality of indoor units 10 are connected to each other
  • the second ends of the plurality of indoor units 10 are connected to each other.
  • the air conditioning system 100 includes a plurality of outdoor units 20
  • the first ends of the plurality of outdoor units 20 are connected to each other
  • the second ends of the plurality of outdoor units 20 are connected to each other.
  • each indoor unit includes one indoor heat exchanger 101 .
  • the compressor 21 has an air intake port 211 and an air discharge port 212.
  • the air intake port 211 of the compressor 21 is configured to be an air intake port.
  • the refrigerant enters the compression chamber of the compressor 21 through the air intake port 211 to be compressed to form a high-temperature and high-pressure refrigerant.
  • the high-temperature and high-pressure refrigerant gas is then discharged from the compressor 21 through the exhaust port 212 of the compressor 21, and then enters the air-conditioning system 100 for refrigerant circulation.
  • each outdoor unit 20 includes one or more compressors 21 .
  • the compressor 21 may be a scroll compressor, a rotary compressor, a screw compressor, or another type of compressor.
  • the outdoor fan 22 is configured to increase the flow speed of the air around the outdoor heat exchanger assembly 3 and increase the heat exchange speed between the outdoor heat exchanger assembly 3 and the surrounding air.
  • the outdoor heat exchanger assembly 3 is configured to perform heat exchange with outdoor air.
  • the outdoor heat exchanger assembly 3 includes a first portion 31 and a second portion 32 , and the second portion 32 and the first portion 31 are sequentially arranged along the direction of the airflow formed when the outdoor fan 22 is working.
  • the first part 31 and the second part 32 are two independent heat exchangers, and when the air-conditioning system 100 operates in cooling or heating mode, the air-conditioning system can be prevented from stopping working due to damage to one of the first part 31 and the second part 32, thereby facilitating the stability and reliability of the operation of the air-conditioning system 100.
  • the first part 31 and the second part 32 are two parts of the same heat exchanger, which facilitates the transportation and assembly of the air-conditioning system 100, thereby facilitating the assembly efficiency of the air-conditioning system 100.
  • the first portion 31 is located on one side of the second portion 32, and in a plane perpendicular to the direction from the first portion 31 to the second portion 32, the projections of at least a portion of the first portion 31 and at least a portion of the second portion 32 overlap.
  • the second portion 32 is configured to exchange heat with the first portion 31. It is understood that the second portion 32 can transfer heat to the first portion 31.
  • the first part 31 and the second part 32 may be arranged in the horizontal direction.
  • the first part 31 is located on one side of the second part 32 in the horizontal direction.
  • the projection of the first part 31 is located within the projection of the second part 32.
  • the projection of the second part 32 is located within the projection of the second part 31.
  • the projection of the first part 31 coincides with the projection of the second part 32.
  • the spacing distance between the first part 31 and the second part 32 is L, 0 ⁇ L ⁇ L1.
  • L1 is the maximum spatial distance of the internal space of the outdoor unit 20.
  • the direction of the airflow formed when the outdoor fan 22 is working is the direction of the arrow in the figure (horizontal direction).
  • the airflow formed when the outdoor fan 22 is working first blows toward the second part 32 and then blows toward the first part 31 .
  • the outdoor heat exchanger assembly 3 includes three rows of heat exchange pipes
  • the outermost row of heat exchange pipes can be used as the second part 32
  • the middle row of heat exchange pipes and the innermost row of heat exchange pipes can be used as the first part 31.
  • the airflow formed when the outdoor fan 22 is in operation first exchanges heat with the second part 32 , and then exchanges heat with the first part 31 .
  • the first part 31 and the second part 32 may be arranged in the vertical direction.
  • the first part 31 is located on one side of the second part 32 in the vertical direction.
  • the projection of the first part 31 is located within the projection of the second part 32.
  • the projection of the second part 32 is located within the projection of the second part 31.
  • the projection of the first part 31 coincides with the projection of the second part 32.
  • the first portion 31 is located above the second portion 32. In this way, during the defrosting process of the outdoor heat exchanger assembly 3, the first portion 31 can be defrosted first, and then the second portion 32 can be defrosted, so that the heat of the first portion 31 can be brought to the second portion 32 through the defrosting water to melt part of the ice layer, thereby accelerating the defrosting speed of the outdoor heat exchanger assembly 3.
  • the second portion 32 is located above the first portion 31. In this way, during the defrosting process of the outdoor heat exchanger assembly 3, the second portion 32 can be defrosted first, and then the first portion 31 can be defrosted, so that the heat of the second portion 32 can be brought to the first portion 31 through the defrosting water to melt part of the ice layer, thereby accelerating the defrosting speed of the outdoor heat exchanger assembly 3.
  • the first end of the first branch 41 is connected to the first end of the second part 32, and the second end of the first branch 41 is connected to the second end of the first part 31.
  • the first branch 41 is provided with a first throttle valve 51, and the first throttle valve 51 is connected to the first branch.
  • the first throttle valve 51 is configured to control the on-off of the first branch 41, and to throttle and reduce the pressure of the refrigerant flowing through the first throttle valve 51.
  • the opening of the first throttle valve 51 is adjustable.
  • the first throttle valve 51 can be adjusted to a fully open state (i.e., the opening of the first throttle valve 51 is 100%), a fully closed state (i.e., the opening of the first throttle valve 51 is 0) and a throttling state (i.e., the opening of the first throttle valve 51 is between 0 and 100%).
  • a fully open state i.e., the opening of the first throttle valve 51 is 100%
  • a fully closed state i.e., the opening of the first throttle valve 51 is 0
  • a throttling state i.e., the opening of the first throttle valve 51 is between 0 and 100%.
  • the first throttle valve 51 When the first throttle valve 51 is in a fully open state and a throttling state, there is conduction between the pipelines at both ends of the first throttle valve 51. And the first throttle valve 51 can throttle and reduce the pressure of the refrigerant flowing through the first throttle valve 51 in the throttling state.
  • the first throttle valve 51 may be an electronic expansion valve; or, the first throttle valve 51 may also be a thermal expansion valve.
  • the first end of the second part 32 and the second end of the first part 31 can be connected through the first branch 41, and the communication between the first end of the second part 32 and the second end of the first part 31 can be controlled by the first throttle valve 51.
  • the first end of the indoor heat exchanger 101 is connected to the exhaust port 212 of the compressor 21
  • the second end of the indoor heat exchanger 101 is connected to the second end of the second part 32
  • the first end of the first part 31 is connected to the air inlet 211 of the compressor 21, so that the refrigerant in the compressor 21 enters the indoor heat exchanger 101 and the second part 32 in sequence from the exhaust port 212, heats the second part 32, and finally returns to the compressor 21 through the first part 31 and the air inlet 211.
  • the outdoor fan 22 works to blow the heated air near the second part 32 to the first part.
  • the second part 32 can be heated by utilizing the waste heat in the refrigerant flowing from the indoor heat exchanger 101 to the second part 32, thereby preventing the second part 32 from frosting.
  • the heated second part 32 can heat the surrounding air to increase the temperature of the surrounding air.
  • the hot air around the second part 32 can be blown to the first part 31, thereby heating the first part 31 to prevent the first part 31 from frosting; at the same time, the heated second part 32 can also heat the first part 31 by heat conduction and heat radiation between the pipes to prevent the first part 31 from frosting.
  • the air conditioning system 100 can avoid frost formation on the outdoor heat exchanger assembly 3 by running the defrost-free mode, and after the temperature of the first part 31 increases, the evaporation capacity of the refrigerant in the first part 31 can be improved. In this way, the heating capacity of the air conditioning system 100 is improved, and the reliability of the compressor and the air conditioning system 100 can also be improved. At the same time, the indoor unit 10 can heat the room uninterruptedly, improving the thermal comfort of the indoor users, thereby improving the user experience.
  • the outdoor unit 20 further includes a reversing assembly 6 .
  • the reversing assembly 6 is configured to adjust the flow direction of the refrigerant in the air-conditioning system 100 .
  • the reversing assembly 6 includes a first valve port 61, a second valve port 62, a third valve port 63 and a fourth valve port 64.
  • the first valve port 61 is connected to the exhaust port 212; the second valve port 62 is connected to the first end of the indoor heat exchanger 101; the third valve port 63 is connected to the first end of the first part 31 and the first end of the second part 32 respectively; the fourth valve port 64 is connected to the air intake port 211.
  • the first valve port 61 can be switched to communicate with one of the second valve port 62 and the third valve port 63
  • the fourth valve port 64 can be switched to communicate with the other of the second valve port 62 and the third valve port 63. That is, when the first valve port 61 is connected to the second valve port 62, the third valve port 63 is connected to the fourth valve port 64; when the first valve port 61 is connected to the third valve port 63, the second valve port 62 is connected to the fourth valve port 64.
  • the reversing assembly 6 may be a four-way reversing valve.
  • the four-way reversing valve can be switched between an open state and a closed state.
  • the four-way reversing valve is powered on, the four-way reversing valve is opened, the first valve port 61 is connected to the second valve port 62, and the third valve port 63 is connected to the fourth valve port 64;
  • the four-way reversing valve is powered off, the four-way reversing valve is closed, the first valve port 61 is connected to the third valve port 63, and the second valve port 62 is connected to the fourth valve port 64.
  • the first valve port 61 when the power is off for the four-way reversing valve, the first valve port 61 is connected to the second valve port 62, and the third valve port 63 is connected to the fourth valve port 64; when the power is on for the four-way reversing valve, the first valve port 61 is connected to the third valve port 63, and the second valve port 62 is connected to the fourth valve port 64.
  • the outdoor unit 20 further includes a second branch 42.
  • a first end of the second branch 42 is communicated with a second end of the first portion 31, a second end of the second branch 42 is communicated with a second end of the indoor heat exchanger 101, a second throttle valve 52 is provided on the second branch 42, and the second throttle valve 52 is communicated with the second branch.
  • the second throttle valve 52 is configured to control the on-off of the second branch 42 and to throttle and reduce the pressure of the refrigerant flowing through the second throttle valve 52. That is, the opening of the second throttle valve 52 is adjustable.
  • the second throttle valve 52 can be adjusted to a fully open state (i.e., the opening of the second throttle valve 52 is 100%), a fully closed state (i.e., the opening of the second throttle valve 52 is 0) and a throttling state (i.e., the opening of the second throttle valve 52 is between 0 and 100%). In the case where the second throttle valve 52 is in a fully closed state, there is no conduction between the pipelines at both ends of the second throttle valve 52.
  • the second throttle valve 52 In the case where the second throttle valve 52 is in a fully open state and a throttling state, there is conduction between the pipelines at both ends of the second throttle valve 52, and the second throttle valve 52 can throttle and reduce the pressure of the refrigerant flowing through the second throttle valve 52 in the throttling state.
  • the outdoor unit 20 further includes a third branch 43.
  • a first end of the third branch 43 is connected to a second end of the second portion 32, a second end of the third branch 43 is connected to a second end of the indoor heat exchanger 101, a third throttle valve 53 is provided on the third branch 43, and the third throttle valve 53 is connected to the third branch 43.
  • the third throttle valve 53 is configured to control the on-off of the third branch 43 and to throttle and reduce the pressure of the refrigerant flowing through the third throttle valve 53.
  • the opening of the third throttle valve 53 is adjustable.
  • the third throttle valve 53 can be adjusted to a fully open state (i.e., the opening of the third throttle valve 53 is 100%), a fully closed state (i.e., the opening of the third throttle valve 53 is 0) and a throttling state (i.e., the opening of the third throttle valve 53 is between 0 and 100%).
  • the third throttle valve 53 is in a fully closed state, the pipelines at both ends of the third throttle valve 53 are not connected.
  • the pipelines at both ends of the third throttle valve 53 are connected, and when the third throttle valve 53 is in the throttling state, the refrigerant flowing through the third throttle valve 53 can be throttled and depressurized.
  • the third valve port 63 is connected to the first end of the second portion 32 and a second on-off valve 54 is disposed on the connecting pipeline.
  • the second on-off valve 54 may be a two-way valve.
  • the second on-off valve 54 may be a solenoid valve, or a throttle valve, for example, the second on-off valve 54 may be an electronic expansion valve.
  • the second on-off valve 54 may be a reversible two-way valve.
  • the second on-off valve 54 is configured to switch between an open state and a closed state to control the on-off of the pipeline between the third valve port 63 and the first end of the second portion 32.
  • the second throttle valve 52 and the third throttle valve 53 may both be electronic expansion valves; or, the second throttle valve 52 and the third throttle valve 53 may both be thermal expansion valves.
  • the air conditioning system 100 provided in some embodiments of the present disclosure has fewer valves and connecting pipes, a simple structure, and low cost.
  • the indoor unit 10 further includes an indoor fan 102 .
  • the indoor fan 102 is configured to increase the heat exchange rate of the indoor heat exchanger 101 .
  • the air conditioning system 100 has a cooling mode, a heating mode, and a defrost-free mode.
  • the following describes in detail the control process and the flow direction of the refrigerant in the cooling mode, heating mode, and defrost-free mode of the air conditioning system in this embodiment.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the third valve port 63, and the second valve port 62 to be connected to the fourth valve port 64.
  • the controller 40 controls the first throttle valve 51 to be adjusted to a fully closed state, the second throttle valve 52 to be adjusted to a throttling state, so as to control the supercooling degree of the outlet of the first part 31, the third throttle valve 53 to be adjusted to a throttling state, so as to control the supercooling degree of the outlet of the second part 32, the second on-off valve 54 to be switched to an open state, and the outdoor fan 22 to work.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the reversing assembly 6 through the first valve port 61, and flows out of the reversing assembly 6 from the third valve port 63.
  • the refrigerant flowing out of the third valve port 63 flows to the first part 31 and the second part 32, and becomes a high-pressure and medium-temperature liquid refrigerant after sufficient heat exchange in the first part 31 and the second part 32.
  • the refrigerant flowing out of the first part 31 and the second part 32 flows through the second throttle valve 52 and the third throttle valve 53, and becomes a low-temperature and low-pressure two-phase refrigerant after being throttled by the second throttle valve 52 and the third throttle valve 53.
  • the two-phase refrigerant after throttling and reducing the pressure by the second throttle valve 52 and the third throttle valve 53 flows into the indoor heat exchanger 101, and is evaporated into a low-temperature and low-pressure gaseous refrigerant in the indoor heat exchanger 101 to cool the indoor environment.
  • the low-temperature and low-pressure gaseous refrigerant flows back to the air intake 211 of the compressor 21 through the second valve port 62 and the fourth valve port 64 in turn, thereby completing the refrigeration cycle of the air-conditioning system 100.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the second valve port 62, and the third valve port 63 to be connected to the fourth valve port 64.
  • the controller 40 controls the first throttle valve 51 to be adjusted to a fully closed state, the second throttle valve 52 to be adjusted to a throttle state, and the third throttle valve 53 to be adjusted to a throttle state to control the suction/exhaust superheat of the compressor 21, the second on-off valve 54 is switched to an open state, and the outdoor fan 22 is operated.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the reversing assembly 6 through the first valve port 61, and flows out of the reversing assembly 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101, and the refrigerant flowing out of the second valve port 62 is cooled to a high-pressure and medium-temperature liquid refrigerant after heat exchange in the indoor heat exchanger 101 to heat the indoor room.
  • the high-pressure and medium-temperature liquid refrigerant flows out of the indoor heat exchanger 101 and flows to the second throttle valve 52 and the third throttle valve 53, and flows into the first part 31 and the second part 32 respectively after throttling by the second throttle valve 52 and the third throttle valve 53, and is evaporated into a low-temperature and low-pressure gaseous refrigerant in the first part 31 and the second part 32.
  • the low-temperature and low-pressure gaseous refrigerant flows out from the first part 31 and the second part 32, and flows back to the air intake 211 of the compressor 21 through the third valve port 63 and the fourth valve port 64 in sequence, thereby completing the heating cycle of the air-conditioning system 100.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the second valve port 62, and the third valve port 63 to be connected to the fourth valve port 64.
  • the controller 40 controls the first throttle valve 51 to be adjusted to the throttling state to control the suction/exhaust superheat of the compressor 21, the second throttle valve 52 to be adjusted to the fully closed state, the third throttle valve 53 to be adjusted to the fully open state, the second on-off valve 54 to be switched to the closed state, and the outdoor fan 22 to work.
  • the above operation can be performed on one of the outdoor units 20 , while the remaining outdoor units 20 remain in their original working state, or the above operation can be performed on all the outdoor units 20 .
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the reversing group through the first valve port 61.
  • Component 6 and flows out of the reversing component 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101, and after heat exchange in the indoor heat exchanger 101, it is cooled to a high-pressure medium-temperature liquid refrigerant to heat the room.
  • the high-pressure medium-temperature liquid refrigerant flows from the indoor heat exchanger 101 to the third throttle valve 53, and flows into the second part 32 after passing through the third throttle valve 53.
  • the waste heat of the high-pressure medium-temperature liquid refrigerant heats the second part 32.
  • the refrigerant flowing out of the second part 32 is throttled by the first throttle valve 51 and flows to the first part 31, and is evaporated into a low-temperature and low-pressure gaseous refrigerant in the first part 31.
  • the low-temperature and low-pressure gaseous refrigerant flows out of the first part 31, and flows back to the suction port 211 of the compressor 21 through the third valve port 63 and the fourth valve port 64 in turn.
  • the heated second part 32 can heat the surrounding air to increase the temperature of the surrounding air.
  • the hot air around the second part 32 can be blown to the first part 31, thereby heating the first part 31 to avoid frost on the first part 31; at the same time, the heated second part 32 can also heat the first part 31 through heat conduction and heat radiation between the pipes to avoid frost on the first part 31. Therefore, the air conditioning system 100 can avoid frost on the outdoor heat exchanger assembly 3, improve the heating capacity of the system, and improve the reliability of the compressor and the system.
  • the indoor unit 10 can heat the room uninterruptedly, improve the thermal comfort of indoor users, and improve the user experience.
  • the outdoor unit 20 of the air conditioning system 100 further includes a fourth branch 44, a first end of the fourth branch 44 is communicated with the exhaust port 212 of the compressor 21, and a second end of the fourth branch 44 is communicated with the second end of the first portion 31.
  • a first on-off valve 55 is provided on the fourth branch 44, and the first on-off valve 55 is communicated with the fourth branch 44.
  • the fourth branch 44 is configured to allow the refrigerant in the compressor 21 to enter the first portion from the exhaust port 212 to heat the first portion 31, and finally return to the compressor 21 through the air intake port 211.
  • the first on-off valve 55 may be a two-way valve.
  • the first on-off valve 55 may be a solenoid valve or a throttle valve.
  • the first on-off valve 55 may be an electronic expansion valve.
  • the first on-off valve 55 may be a reversible two-way valve.
  • the first on-off valve 55 is configured to switch between an open state and a closed state to control the on-off of the fourth branch 44.
  • the first part 31 can be directly heated by the refrigerant discharged from the compressor 21 on the basis of heating the first part 31 through the second part 32, which is beneficial to increase the heating rate of the first part 31.
  • the defrosting speed can be increased.
  • the air conditioning system 100 also has a defrost mode.
  • the air conditioning system 100 can defrost the outdoor heat exchanger assembly by using the heat of the refrigerant discharged by the compressor 21 during the defrost mode.
  • the following describes in detail the control process and the flow direction of the refrigerant of the cooling mode, heating mode, defrost-free mode, and defrost mode of the air conditioning system provided in some embodiments of the present disclosure.
  • the air conditioning system 100 provided in some embodiments of the present disclosure further includes a first on-off valve 55.
  • the controller 40 controls the first on-off valve 55 to switch to a closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the cooling mode of the air-conditioning system 100 of some embodiments shown in FIG. 8 , and will not be described in detail here.
  • the air conditioning system 100 provided in some embodiments of the present disclosure further includes a first on-off valve 55.
  • the controller 40 controls the first on-off valve 55 to switch to a closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the heating mode of the air-conditioning system 100 of some embodiments shown in FIG. 9 , and will not be described in detail here.
  • the air conditioning system 100 provided in some embodiments of the present disclosure further includes a first on-off valve 55.
  • the controller 40 switches the first on-off valve 55 to a closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the defrost-free mode of the air-conditioning system 100 of some embodiments shown in FIG. 10 , and will not be described in detail here.
  • air conditioning system 100 may also operate in a defrost mode.
  • the air conditioning system 100 when the air conditioning system 100 operates in the defrost mode, in the outdoor unit 20, a portion of the refrigerant flowing out of the compressor 21 can flow through the fourth branch 44 to directly heat the first portion 31.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the second valve port 62, and the third valve port 63 to be connected to the fourth valve port 64.
  • the controller 40 controls the first throttle valve 51 to be adjusted to a fully closed state, the second throttle valve 52 to be adjusted to a fully closed state, and the third throttle valve 53 to be adjusted to a throttling state to control the suction/exhaust superheat of the compressor 21, the second on-off valve 54 to be switched to an open state, the first on-off valve 55 to be switched to an open state, and the outdoor fan 22 to work.
  • a portion of the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the reversing assembly 6 through the first valve port 61, and flows out of the reversing assembly 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101, and after heat exchange in the indoor heat exchanger 101, it is cooled to a high-pressure medium-temperature liquid refrigerant to heat the room.
  • the high-pressure medium-temperature liquid refrigerant flows from the indoor heat exchanger 101 to the third throttle valve 53, flows into the second part 32 after being throttled by the third throttle valve 53, and is evaporated into a low-temperature and low-pressure gaseous refrigerant in the second part 32.
  • the low-temperature and low-pressure gaseous refrigerant flows out of the second part 32, and flows back to the suction port 211 of the compressor 21 through the second on-off valve 54, the third valve port 63, and the fourth valve port 64 in sequence.
  • Another part of the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the first part 31 through the fourth branch 44 and the first on-off valve 55.
  • the refrigerant flowing out of the first part 31 flows back to the suction port 211 of the compressor 21 through the second on-off valve 54, the third valve port 63, and the fourth valve port 64 in sequence.
  • the first part 31 can be directly heated by utilizing the sensible high temperature of the refrigerant discharged from the compressor 21. In this way, the heating speed of the first part 31 can be accelerated, and the temperature of the first part 31 can be rapidly increased. In the case where thick frost is formed on the first part 31, the defrosting speed of the first part 31 can be accelerated.
  • the outdoor unit 20 further includes a fifth branch 45, a first end of the fifth branch 45 is connected to the exhaust port, and a second end of the fifth branch 45 is connected to the second end of the second portion 32.
  • a throttling assembly 56 is connected in series to the fifth branch 45.
  • the throttling assembly 56 is configured to control the on-off of the fifth branch 45 and to throttle and reduce the pressure of the refrigerant flowing through the fifth branch 45.
  • the opening of the throttling assembly 56 is adjustable.
  • the throttling assembly 56 can be adjusted to a fully open state (i.e., the opening of the throttling assembly 56 is 100%), a fully closed state (i.e., the opening of the throttling assembly 56 is 0) and a throttling state (i.e., the opening of the throttling assembly 56 is between 0 and 100%).
  • a fully open state i.e., the opening of the throttling assembly 56 is 100%
  • a fully closed state i.e., the opening of the throttling assembly 56 is 0
  • a throttling state i.e., the opening of the throttling assembly 56 is between 0 and 100%.
  • the throttling assembly 56 When the throttling assembly 56 is in a fully open state and a throttling state, there is conduction between the pipelines at both ends of the throttling assembly 56, and when the throttling assembly 56 is in a throttling state, the refrigerant flowing through the throttling assembly 56 can be throttled and reduced in pressure.
  • the throttling component 56 includes a throttling valve.
  • the throttling component 56 may include an electronic expansion valve, which can improve the operating speed and control accuracy of the air conditioning system 100.
  • the second end of the second part 32 is the liquid inlet end, and the second end of the fifth branch 45 is connected to the liquid inlet end of the second part 32.
  • the pipeline distribution and connection structure between the fifth branch 45 and the second part 32 can be simplified, which is convenient for assembling the air-conditioning system.
  • the second end of the fifth branch 45 is connected to the pipeline between the third throttle valve 53 and the second part 32.
  • the refrigerant in the fifth branch 45 can bypass the third throttle valve 53 and directly enter the second part 32, so that the third throttle valve 53 can be prevented from affecting the state of the refrigerant on the fifth branch 45.
  • the throttle component 56 can be controlled so that the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 can enter the second part 32 along the fifth branch 45 after being throttled and reduced in pressure by the throttle component 56 to become a liquid refrigerant, thereby defrosting the second part 32 using the latent heat of the exhaust gas of the compressor 21; when it is not necessary to defrost the second part 32, the throttle component 56 can be controlled to be adjusted to a fully closed state, so that the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 can be prevented from flowing to the fifth branch 45, affecting the operation of the air-conditioning system 100, which is conducive to improving the reliability of the operation of the air-conditioning system 100.
  • the throttling assembly 56 is configured to control the on-off of the fifth branch 45.
  • the throttling assembly 56 includes a third on-off valve and a pressure reducer connected in series, which is conducive to reducing the manufacturing difficulty and cost of the throttling assembly 56 and facilitating maintenance.
  • the first end of the fifth branch 45 is connected to the exhaust port, and the first end of the first branch 41 is connected to the pipeline between the second throttle valve 52 and the second end of the first part 31.
  • the second end of the fifth branch 45 is connected to the first end of the second part 32 and the pipeline between the second on-off valve 54, and the second end of the first branch 41 is connected to the second end of the second part 32.
  • the second end of the fifth branch 45 is connected to the air inlet end of the second part 32, and the pressure loss of the fifth branch 45 is small, so a throttling assembly 56 of a smaller specification can be selected, thereby reducing the cost of the air conditioning system 100.
  • the second end of the first branch 41 is connected to the pipeline between the second end of the second part 32 and the third throttle valve 53.
  • the principle and effect are similar to the embodiments shown in Figures 4 and 6, and will not be repeated here.
  • the air conditioning system 100 has a cooling mode, a heating mode, and a defrost mode.
  • the air conditioning system 100 provided in some embodiments of the present disclosure further includes a throttling component 56.
  • the controller 40 controls the throttling component 56 to be adjusted to a fully closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the cooling mode of the air-conditioning system 100 of some embodiments shown in FIG. 12 , and will not be described in detail here.
  • the air conditioning system 100 provided in some embodiments of the present disclosure further includes a throttling component 56.
  • the controller 40 controls the first on-off valve 55 to switch to a closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the heating mode of the air-conditioning system 100 of some embodiments shown in FIG. 13 , and will not be described in detail here.
  • the air conditioning system 100 provided by some embodiments of the present disclosure further includes a throttling component 56.
  • the controller 40 controls the throttling component 56 to be adjusted to a fully closed state.
  • the refrigerant flow direction is the same as the refrigerant flow direction in the defrost mode of the air-conditioning system 100 of some embodiments shown in FIG. 15 , and will not be repeated here.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the second valve port 62, and the third valve port 63 to be connected to the fourth valve port 64.
  • the controller 40 controls the second on-off valve 54 to switch to a closed state, the second throttle valve 52 to adjust to a throttling state, the third throttle valve 53 to adjust to a closed state, the throttling assembly 56 to adjust to a throttling state, the first on-off valve 55 to switch to a closed state, and the first throttle valve 51 to adjust to a throttling state.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows to the reversing component 6 and the fifth branch 45 respectively.
  • the refrigerant flowing to the reversing component 6 flows into the reversing component 6 through the first valve port 61, and flows out of the reversing component 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101.
  • the high-temperature and high-pressure gaseous refrigerant flowing to the indoor heat exchanger 101 is condensed into a high-temperature and high-pressure supercooled liquid refrigerant after heat exchange in the indoor heat exchanger 101.
  • the high-temperature and high-pressure supercooled liquid refrigerant flowing out of the indoor heat exchanger 101 flows to the second throttle valve 52, and becomes a low-temperature and low-pressure two-phase refrigerant after being throttled in the second throttle valve 52.
  • the low-temperature and low-pressure two-phase refrigerant flows to the first part 31, and becomes a low-temperature and low-pressure gaseous refrigerant after evaporation in the first part 31.
  • the high-temperature and high-pressure gaseous refrigerant flowing to the fifth branch 45 is throttled by the throttling component 56 and becomes a high-temperature and medium-pressure gaseous refrigerant, and then flows into the second part 422.
  • the high-temperature and medium-pressure gaseous refrigerant is condensed in the second part 422 and becomes a medium-temperature and medium-pressure liquid refrigerant, and then flows into the first branch 41.
  • the two merged refrigerants are evaporated and become a low-temperature and low-pressure gaseous refrigerant, and flow back to the suction port 211 of the compressor 21 through the third valve port 63 and the fourth valve port 64 in turn, thereby completing the defrosting refrigerant cycle for the second part 32.
  • the air-conditioning system 100 includes a first defrost flow path formed by connecting the exhaust port 212, the fourth branch 44, the first part 31 and the air intake port 211 of an outdoor unit 20 in sequence, a second defrost flow path formed by connecting the exhaust port 212, the fifth branch 45, the second part 32, the first branch 41, the first part 31 and the air intake port 211 in sequence, and a third defrost flow path formed by connecting the exhaust port 212, the fifth branch 45, the second part 32 and the air intake port 301 in sequence.
  • the air conditioning system 100 can defrost the first part 31 through the first defrosting flow path by using the sensible heat of a portion of the high-temperature and high-pressure gaseous refrigerant from the compressor 21.
  • the first part 31 acts as a condenser
  • the second part 32 can act as an evaporator
  • the indoor heat exchanger 101 can use another portion of the high-temperature and high-pressure gaseous refrigerant from the compressor 21 to heat the indoor air.
  • the air conditioning system 100 can defrost the second part 32 through the third defrosting flow path by using the sensible heat of a portion of the high-temperature and high-pressure gaseous refrigerant from the compressor 21.
  • the second part 32 acts as a condenser
  • the first part 31 can act as an evaporator
  • the indoor heat exchanger 101 can use another portion of the high-temperature and high-pressure gaseous refrigerant from the compressor 21 to heat the indoor air.
  • the air conditioning system 100 can defrost the second part 32 by controlling the opening of the throttling assembly 56 and the first throttling valve 51 on the second defrosting flow path, and utilizing the latent heat of the high-temperature and high-pressure gaseous refrigerant from the compressor 21. The refrigerant releases more heat and the defrosting speed is fast.
  • the second part 32 acts as a condenser
  • the first part 31 can act as an evaporator
  • the indoor heat exchanger 101 can utilize another part of the high-temperature and high-pressure gaseous refrigerant from the compressor 21 to heat the indoor air
  • the refrigerant flowing from the second part 32 to the first part 31 can increase the temperature of the refrigerant flowing from the indoor heat exchanger 101 into the first part 31, which can reduce the frosting speed of the first part 31 and avoid energy waste.
  • the air-conditioning system 100 can defrost the first part 31 and the second part 32 alternately, and can also use hot gas bypass sensible heat defrosting for the first part 31 and medium pressure latent heat defrosting for the second part 32. While ensuring that the air-conditioning system 100 continuously heats the indoor space and defrosts quickly, it not only utilizes the advantages of simple structure, good effect and low cost of hot gas bypass defrosting, but also avoids serious capacity waste caused by the entire outdoor heat exchanger assembly 3 being defrosted by hot gas bypass.
  • Hot gas bypass sensible heat defrosting is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 21 enters the outdoor heat exchanger assembly through the bypass flow path. The sensible heat of the refrigerant is thereby used to defrost the outdoor heat exchanger assembly.
  • Medium-pressure latent heat defrosting is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 21 is cooled into a high-pressure and medium-temperature liquid refrigerant after heat exchange, and then enters the outdoor heat exchanger component, thereby utilizing the latent heat of the refrigerant to defrost the outdoor heat exchanger component.
  • the bypass flow path may be the fifth branch 45 of the second defrost flow path, and a portion of the high-temperature and high-pressure gaseous refrigerant from the compressor 21 enters the second portion 32 through the fifth branch 45, thereby utilizing the sensible heat of the refrigerant to perform hot gas bypass sensible heat defrosting on the second portion 32.
  • the refrigerant After heat exchange through the second portion 32, the refrigerant is cooled to a high-pressure and medium-temperature liquid refrigerant, and then enters the first portion 31 through the first branch 41, thereby utilizing the latent heat of the refrigerant to perform medium-pressure latent heat defrosting on the first portion 31.
  • the air conditioning system 100 further includes a gas-liquid separator 8 having a liquid inlet 81 and a gas outlet 82 .
  • the liquid inlet 81 is connected to the fourth valve port 64
  • the gas outlet 82 is connected to the air intake port 211 .
  • the gas-liquid separator 8 can separate the gas and liquid of the refrigerant entering the compressor 21 to avoid liquid hammer problems in the compressor 21, thereby helping to improve the reliability and stability of the operation of the compressor 21.
  • the outdoor unit 20 further includes a subcooler 9, and the second throttle valve 52 and the third throttle valve 53 are connected to the second end of the indoor heat exchanger 101 through the subcooler 9.
  • the flash gas generated in the throttling process of the air-conditioning system 100 can be reduced, which is beneficial to improving the cooling capacity of the air-conditioning system 100, and can also improve the stability of the operation of the compressor 21, thereby helping to improve the stability and reliability of the air-conditioning system 100.
  • the air conditioning system 100 further includes a first stop valve 103 and a second stop valve 104.
  • the first stop valve 103 is communicated with a first end of the indoor heat exchanger 101
  • the second stop valve 104 is communicated with a second end of the indoor heat exchanger 101. It is understood that when the indoor heat exchanger 101 fails and needs to be repaired or replaced, the first stop valve 103 and the second stop valve 104 can be closed to seal the refrigerant in the indoor heat exchanger 101 in the indoor heat exchanger 101, thereby facilitating the repair of the indoor heat exchanger 101.
  • the air conditioning system 100 may be a multi-split system. As shown in FIG1 , the air conditioning system 100 includes a plurality of indoor units 10. An indoor heat exchanger 101 is disposed in each indoor unit 10. The plurality of indoor units 10 are disposed in parallel. The first ends of the indoor heat exchangers 101 of the plurality of indoor units 10 are all communicated with a first stop valve 103. The second ends of the indoor heat exchangers 101 of the plurality of indoor units 10 are all communicated with a second stop valve 104.
  • the outdoor fan 22 may be disposed on a side of the first portion 31 away from the second portion 32. In this way, when the second portion 32 is defrosted, the outdoor fan 22 may be operated to increase the heat supply of the air conditioning system 100, which is beneficial to improving the heating performance of the air conditioning system 100.
  • the outdoor fan 22 may also be disposed on a side of the second portion 32 away from the first portion 31. When the first portion 31 is defrosted, the outdoor fan 22 may be operated to increase the heat supply of the air conditioning system 100, which is beneficial to improving the heating performance of the air conditioning system 100.
  • the air conditioning system 100 includes a detection component, which is configured to detect multiple parameter information of the air conditioning system 100, and the controller 40 is electrically connected to the detection component.
  • the detection component includes: a first pressure sensor 71 for detecting the suction pressure Ps, a second pressure sensor 72 for detecting the exhaust pressure Pd, a sixth temperature sensor 73 for detecting the exhaust temperature Td, a first temperature sensor 74 for detecting the pressure reducer temperature Te1 of the first part 31, a second temperature sensor 75 for detecting the pressure reducer temperature Te2 of the second part 32, a fourth temperature sensor 76 for detecting the air pipe temperature Tg1 of the first part 31, a fifth temperature sensor 77 for detecting the air pipe temperature Tg2 of the second part 32, and a third temperature sensor 78 for detecting the outdoor ambient temperature Ta.
  • the suction pressure Ps is the suction pressure of the suction port of the compressor
  • the exhaust pressure Pd is the exhaust pressure of the exhaust port of the compressor
  • the exhaust temperature Td is the temperature of the exhaust port of the compressor
  • the air pipe temperature of the first part 31 is the temperature of the first end of the first part 31
  • the pressure reducer temperature of the first part 31 is the temperature of the second end of the first part
  • the air pipe temperature of the second part 32 is the temperature of the first end of the second part
  • the pressure reducer temperature of the second part 32 is the temperature of the second end of the second part 32.
  • the controller 40 is configured as follows: if the air-conditioning system reaches the start condition of the defrost-free mode, the first branch is controlled to be conductive so that the refrigerant of the compressor of the outdoor unit heats the second part, and the second part heats the first part; if the air-conditioning system meets the end condition of the defrost-free mode, the air-conditioning system runs the working mode set by the user.
  • Some embodiments of the present disclosure further provide a defrost control method, as shown in FIG. 24 , the defrost control method includes steps S100 to S400 .
  • step S100 it is detected whether the air conditioning system meets the defrost-free mode start condition.
  • step S200 if the air conditioning system meets the defrost-free mode start condition, the air conditioning system is controlled to run the defrost-free mode to heat the second part in the outdoor unit, and the second part heats the first part.
  • step S300 it is detected whether the air conditioning system meets the defrost-free mode termination condition.
  • the preset working mode is a cooling mode, heating mode or other working mode set by the user.
  • the air conditioning system 100 runs the defrost-free mode to heat the second part 32 in the outdoor unit 20, and the second part 32 heats the first part 31, so that the temperature of the first part 31 and the second part 32 can be increased to avoid frost on the outdoor heat exchanger assembly 3.
  • the air conditioning system 100 can continue to heat the room, and on the basis of uninterrupted heating of the room, effectively avoid frost on the outdoor heat exchanger assembly 3, which is conducive to improving the reliability of the compressor and the system and improving the user experience.
  • defrost control method provided in some embodiments of the present disclosure can be adjusted according to the different structures of the air-conditioning system 100.
  • the controller 40 is further configured to: if the air conditioning system meets the defrost-free mode start condition, adjust the first suction superheat Tssh1 of the compressor to be greater than or equal to the first threshold d, and adjust the exhaust superheat Tdsh of the compressor to be greater than or equal to the second threshold e.
  • Tssh1 Tg1-Tcps
  • Tdsh Td-Tcpd
  • Tg1 is the temperature of the first end of the first part
  • Td is the exhaust temperature of the exhaust port of the compressor
  • Tcps is the saturation temperature corresponding to the suction pressure of the compressor
  • Tcpd is the saturation temperature corresponding to the exhaust pressure of the compressor.
  • the value range of d is: 0°C ⁇ d ⁇ 3°C, 3°C ⁇ d ⁇ 6°C or 6°C ⁇ d ⁇ 10°C; and/or the value range of e is: 20°C ⁇ e ⁇ 28°C, 28°C ⁇ e ⁇ 36°C or 36°C ⁇ e ⁇ 40°C.
  • the starting conditions of the defrost-free mode include: the minimum value Tamin of the outdoor environment temperature is less than or equal to a third threshold value a, the minimum value Te1min of the temperature at the second end of the first part or the minimum value Te2min of the temperature at the second end of the second part is less than or equal to a fourth threshold value b, and the cumulative operating time of the air-conditioning system in the heating mode reaches a fifth threshold value c; for example, -7°C ⁇ a ⁇ 7°C, b ⁇ 0°C, 10min ⁇ c.
  • the controller 40 is further configured to: if the air-conditioning system meets the defrost-free mode termination condition, control the fourth branch to be turned on so that the refrigerant in the compressor enters the first part from the exhaust port through the fourth branch and heats the first part.
  • the controller 40 is further configured as follows: if the air-conditioning system meets the start conditions of the defrost-free mode, the minimum value Pdmin of the exhaust pressure of the compressor is compared with the first threshold pressure h and the second threshold pressure I, respectively, and a comparison result is obtained; if Pdmin ⁇ h, the wind speed of the indoor fan is controlled to be the first wind speed, for example, the first wind speed is the wind speed set by the user; if Pdmin ⁇ I, the indoor fan is controlled to stop running; and, if I ⁇ Pdmin ⁇ h, the wind speed of the indoor fan is controlled to be the second preset wind speed; for example, I ⁇ h, the speed of the indoor fan at the second preset wind speed is less than the maximum speed of the indoor fan.
  • the speed of the indoor fan at the second preset wind speed is less than half of the maximum speed of the indoor fan.
  • I is 1MPa.
  • h is 1.8MPa
  • I is 1MPa.
  • h is 1.8MPa
  • I is 1.2MPa.
  • h is 1.8MPa
  • I is 1.5MPa.
  • h is 2MPa
  • I is 1.2MPa.
  • I is 1.5MPa.
  • the controller 40 is further configured as follows: if the air-conditioning system meets the start conditions of the defrost-free mode, the minimum value Tomin of the indoor unit outlet air temperature is compared with the first threshold temperature M1 and the second threshold temperature N1, and a comparison result is obtained; the minimum value Tlmin of the liquid pipe temperature of the indoor heat exchanger is compared with the third threshold temperature M2 and the fourth threshold temperature N2, and a comparison result is obtained; if Tomin ⁇ M1 or Tlmin ⁇ M2, the wind speed of the indoor fan is controlled to be the wind speed set by the user; if Tomin ⁇ N1 and Tlmin ⁇ N2, the indoor fan is controlled to stop running; and, if N1 ⁇ Tomin ⁇ M1 or N2 ⁇ Tlmin ⁇ M2, the wind speed of the indoor fan is controlled to be the second preset wind speed; for example, N1 ⁇ M1, N2 ⁇ M2, the speed of the indoor fan at the second preset wind speed is less than the maximum speed of the indoor fan.
  • the speed of the indoor fan at the second preset wind speed is less than half of the maximum speed of the indoor fan.
  • the defrost control method is supplemented below with reference to Figure 3 and Figure 25.
  • the defrost control method further includes steps S1 to S5.
  • step S1 a plurality of temperature values and a plurality of pressure values are collected during the operation of the air-conditioning system.
  • the multiple temperature values collected include: Ta, Te1, Te2, Tg1 and Tg2
  • the multiple pressure values collected include: Ps, Pd, Td.
  • the air-conditioning system 100 includes a plurality of outdoor units 20, there may be a plurality of the various parameters detected above. In actual use, the maximum value or the minimum value of the parameters detected above is taken.
  • each of the two outdoor units 20 can measure a Tg1 , and when taking a value for Tg1 , the maximum value Tg1max or the minimum value Tg1min can be taken.
  • step S2 it is determined whether the air conditioning system needs heating.
  • step S3 the air conditioning system is controlled to operate in a heating mode.
  • step S4 the air conditioning system is controlled to operate in cooling mode.
  • step S3 the process goes to step S5.
  • step S5 it is determined whether the air conditioning system meets the defrost-free mode start condition.
  • detecting whether the air conditioning system 100 meets the defrost-free mode start condition includes: detecting the minimum value Tamin of the temperature of the outdoor environment, detecting the minimum value Te1min of the pressure reducer temperature of the first part 31, and detecting the minimum value Te2min of the pressure reducer temperature of the second part 32.
  • the defrost-free mode start condition includes: Tamin ⁇ a, Te1min ⁇ b1 or Te2min ⁇ b1, and the cumulative running time of the air conditioning system 100 running in the heating mode reaches c1 minutes. For example, -7°C ⁇ a ⁇ 7°C, b1 is 0°C, 10min ⁇ c1 ⁇ 20min.
  • the value of a may be -6°C, -3°C, -1°C, 0°C, 1°C, 3°C, or 6°C, etc.
  • the value of c1 can be 10 min, 12 min, 13 min, 14 min, 16 min or 19 min, etc.
  • the air conditioning system 100 can determine whether the defrost-free mode start conditions are met according to the above parameters, which is conducive to the air conditioning system 100 timely adjusting to the defrost-free mode, avoiding frost on the outdoor heat exchanger assembly 3, thereby avoiding affecting the indoor heating of the air conditioning system 100, which is conducive to improving the reliability of the compressor and the system, and improving the user experience.
  • the target values b1 of Te1min and Te2min are set high, and the cumulative heating time target value c1 is set low, which can make it easier for the air conditioning system 100 to enter the defrost-free control, and can better avoid maintaining the frost on the outdoor heat exchanger assembly 3.
  • the defrost-free mode start condition is: Tamin ⁇ a, Te1min ⁇ b2 or Te2min ⁇ b2, and the air conditioning system operates in the heating mode for a cumulative time of c2 minutes. For example, -5°C ⁇ b2 ⁇ 0°C, 20min ⁇ c2 ⁇ 30min.
  • the value of b2 may be -4°C, -3°C, -2°C, -1°C, or -0.5°C, etc.
  • the value of c2 can be 20 min, 22 min, 23 min, 24 min, 27 min or 29 min, etc.
  • the air conditioning system 100 can determine whether the start conditions of the defrost-free mode are met according to the above parameters, which is conducive to the air conditioning system 100 to adjust to the defrost-free mode in a timely manner, avoiding frost on the outdoor heat exchanger assembly 3, thereby avoiding affecting the indoor heating of the air conditioning system 100, which is conducive to improving the reliability of the compressor and the system, and improving the user experience.
  • Te1min and Te2min target values b2 are set relatively high, and the heating cumulative time target value c1 is set relatively high, which can avoid the air conditioning system 100 from frequently entering the defrost-free control, can extend the period of continuous indoor heating of the air conditioning system 100, and can also improve the heating capacity of the air conditioning system 100 to a certain extent.
  • step S5 if it is determined that the air conditioning system does not meet the defrost-free mode start condition, the process returns to step S3. If it is determined that the air conditioning system 100 meets the defrost-free mode start condition, the process turns to step S6.
  • the above-mentioned control of the air conditioning system 100 to operate in the defrost-free mode includes: in the outdoor unit 20, controlling the first valve port 61 to communicate with the second valve port 62, and the third valve port 63 to communicate with the fourth valve port 64. Adjusting the second throttle valve 52 to a fully closed state, adjusting the third throttle valve 53 to a fully open state, controlling the second on-off valve 54 to switch to a closed state, adjusting the first throttle valve 51 to throttling, and controlling the outdoor fan 22 to work. Adjusting the first suction superheat Tssh1 of the compressor 21 so that Tssh1 ⁇ d; adjusting the exhaust superheat Tdsh of the compressor 21 so that Tdsh ⁇ e.
  • Tssh1 Tg1-Tcps
  • Tdsh Td-Tcpd
  • Tg1 is the air pipe temperature of the first part 31
  • Td is the exhaust temperature of the exhaust port 212 of the compressor
  • Tcps is the saturation temperature corresponding to the suction pressure Ps of the compressor
  • Tcpd is the saturation temperature corresponding to the exhaust pressure Pd of the compressor 21.
  • the above-mentioned outdoor unit 20 indicates that when the air-conditioning system 100 includes multiple outdoor units 20, the outdoor heat exchanger assembly 3 in one of the outdoor units 20 can be heated first to prevent the outdoor heat exchanger assembly 3 in the outdoor unit 20 from frosting; the outdoor heat exchanger assemblies 3 in multiple outdoor units 20 can also be heated at the same time to prevent the outdoor heat exchanger assemblies 3 in the multiple outdoor units 20 from frosting.
  • the above-mentioned heating of the outdoor heat exchanger assemblies 3 in the outdoor unit 20 can be selected according to actual conditions.
  • the air conditioning system 100 including the outdoor unit 20A and the outdoor unit 20B as an example, when determining whether the air conditioning system 100 meets the defrost-free mode start condition in step S5, the relevant parameters in the outdoor unit 20A meet the defrost-free mode start condition, and the relevant parameters in the outdoor unit 20B do not meet the defrost-free mode start condition.
  • the number does not meet the start conditions of the defrost-free mode.
  • the air-conditioning system 100 is controlled to operate in the defrost-free mode, so that the refrigerant in the outdoor unit 20A can heat the outdoor heat exchanger component 3, while the refrigerant in the outdoor unit 20B still flows according to the refrigerant flow direction in the original heating mode. In this way, the outdoor heat exchanger component 3 can be heated more specifically to avoid heat waste in the refrigerant.
  • step S5 when determining in step S5 whether the air-conditioning system 100 satisfies the start conditions of the defrost-free mode, the relevant parameters in the outdoor unit 20A satisfy the start conditions of the defrost-free mode, and the relevant parameters in the outdoor unit 20B also satisfy the start conditions of the defrost-free mode.
  • the air-conditioning system 100 is controlled to operate the defrost-free mode, so that the refrigerant in the outdoor unit 20A and the refrigerant in the outdoor unit 20B can heat the outdoor heat exchanger assembly 3 at the same time.
  • the value of d may be 0°C, 2°C, 4°C, 6°C, 8°C, or 10°C, etc.
  • the value of e may be 20°C, 25°C, 30°C, 34°C, 38°C or 40°C, etc.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 can flow into the reversing assembly 6 through the first valve port 61, and flow out of the reversing assembly 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101, and is cooled to a high-pressure and medium-temperature liquid refrigerant after heat exchange in the indoor heat exchanger 101 to heat the indoor room, and then flows out of the indoor heat exchanger 101 to the third throttle valve 53, and flows into the second part 32 after passing through the third throttle valve 53, and the second part 32 is heated by the waste heat of the refrigerant, and then flows to the first part 31 after throttling through the first throttle valve 51, and evaporates into a low-temperature and low-pressure gaseous refrigerant in the first part 31. Finally, the refrigerant flowing out of the first part 31 flows back to the air intake port 211 of the compressor 21 through the third valve port 63 and the fourth valve port 64 in sequence.
  • the heated second part 32 can heat the surrounding air to increase the temperature of the surrounding air.
  • the hot air around the second part 32 can be blown to the first part 31, thereby heating the first part 31 to avoid frosting of the first part 31; at the same time, the heated second part 32 can also heat the first part 31 by heat conduction and heat radiation between the pipes to avoid frosting of the first part 31. Therefore, the air-conditioning system 100 provided in some embodiments of the present disclosure can avoid frosting of the outdoor heat exchanger assembly 3, improve the heating capacity of the air-conditioning system 100, and improve the reliability of the compressor and the system to a certain extent.
  • the indoor unit 10 can heat the room uninterruptedly, improve the thermal comfort of indoor users, and improve the user experience.
  • step S6 the air-conditioning system can continue to heat the first part 31 and the second part 32, thereby increasing the temperature of the outdoor heat exchanger assembly 3, and making the temperature of the outdoor heat exchanger assembly 3 higher than the temperature at which frost is formed, thereby avoiding frosting of the first part 31 and the second part 32 of the outdoor heat exchanger assembly 3.
  • step S7 it is determined whether the air conditioning system meets the defrost-free mode termination condition.
  • the defrost-free mode termination condition includes: the minimum value Tg1min in Tg1 ⁇ f and the duration is g seconds. For example, 0°C ⁇ f ⁇ 10°C, 5 seconds ⁇ g ⁇ 30 seconds.
  • the value of f may be 0°C, 2°C, 4°C, 6°C, 8°C, or 10°C, etc.
  • the value of g can be 5 seconds, 10 seconds, 15 seconds, 20 seconds, 25 seconds or 30 seconds, etc.
  • the temperature of the outdoor heat exchanger assembly 3 is relatively high and a certain amount of heat is retained. At this time, even if the outdoor heat exchanger assembly 3 is no longer heated, it is difficult for the outdoor heat exchanger assembly 3 to frost.
  • step S8 the air conditioning system is controlled to operate in a preset working mode.
  • the first portion 31 of the air-conditioning system 100 may be heavily frosted, and after the air-conditioning system 100 operates in the defrost-free mode, some frost may still remain on the first portion 31 .
  • the above-mentioned defrost control method after the above-mentioned detection that the air-conditioning system 100 reaches the end condition of the defrost-free mode, before the air-conditioning system 100 is operated in the working mode set by the user, the above-mentioned defrost control method also includes steps S110 to S130.
  • step S110 the air conditioning system 100 is controlled to operate in a defrosting mode to heat the first part 31 in the outdoor unit 20 .
  • step S120 it is detected whether the defrosting of the first part 31 is completed.
  • step S130 if completed, the air conditioning system 100 is controlled to exit the defrost mode.
  • the air conditioning system 100 can heat the first part 31 alone, so that the first part continues to heat up, which is beneficial to removing frost on the first part 31.
  • the defrost control method of the air conditioning system 100 includes steps S1A to S11A.
  • step S1A a plurality of temperature values and a plurality of pressure values are collected during the operation of the air-conditioning system.
  • the multiple temperature values collected include Ta, Te1, Te2, Tg1, and Tg2 and the multiple pressure values collected include Ps, Pd, and Td.
  • the air-conditioning system 100 includes a plurality of outdoor units 20, there may be a plurality of the various parameters detected above. In actual use, the maximum value or the minimum value of the parameters detected above is taken.
  • each of the two outdoor units 20 can measure a Tg1 , and when taking a value for Tg1 , the maximum value Tg1max or the minimum value Tg1min can be taken.
  • step S2A it is determined whether the air conditioning system needs heating.
  • step S3A the air conditioning system is controlled to operate in a heating mode.
  • step S4A the air conditioning system is controlled to operate in cooling mode.
  • step S3A After step S3A, the process goes to step S5A.
  • step S5A it is determined whether the air conditioning system satisfies the defrost-free mode start condition.
  • the condition for starting the defrost-free mode is detected to determine whether the air conditioning system 100 meets the conditions for starting the defrost-free mode: Tamin ⁇ a, Te1min ⁇ b3 or Te2min ⁇ b3, and the cumulative running time of the air conditioning system 100 in the heating mode reaches c3 minutes. For example, -7°C ⁇ a ⁇ 7°C, b3 ⁇ -5°C, c3 ⁇ 30min.
  • the value of a may be -6°C, -3°C, -1°C, 0°C, 1°C, 3°C, or 6°C, etc.
  • the value of b3 may be -6°C, -7°C, -8°C, -9°C, -10°C, -13°C, or -16°C, etc.
  • the value of c3 can be 30 min, 32 min, 33 min, 34 min, 36 min or 39 min, etc.
  • the air conditioning system 100 can determine whether the start conditions of the defrost-free mode are met according to the above parameters, which is conducive to the air conditioning system 100 to adjust to the defrost-free mode in a timely manner, avoiding frost on the outdoor heat exchanger assembly 3, thereby avoiding affecting the indoor heating of the air conditioning system 100, which is conducive to improving the reliability of the compressor and the system, and improving the user experience.
  • the target values b1 of Te1min and Te2min are set too low, and the target value c3 of the cumulative heating time is set too high, which can further avoid the air conditioning system 100 from frequently entering the defrost-free control, can further extend the period of continuous indoor heating of the air conditioning system 100, and can also improve the heating capacity of the air conditioning system 100 to a certain extent.
  • step S5A If it is determined in step S5A that the air conditioning system 100 does not meet the defrost-free mode start condition, the process returns to step S3A. If it is determined that the air conditioning system 100 does not meet the defrost-free mode start condition, the process turns to step S6A.
  • step S6A the air conditioning system is controlled to operate in the defrost-free mode.
  • the method of controlling the air conditioning system 100 to operate in the defrost-free mode is the same as that of the previous embodiment and will not be described again here.
  • step S6A the air-conditioning system can continue to heat the first part 31 and the second part 32, thereby increasing the temperature of the outdoor heat exchanger assembly 3 and making the temperature of the outdoor heat exchanger assembly 3 higher than the temperature at which frost is formed, thereby avoiding frosting of the first part 31 and the second part 32 of the outdoor heat exchanger assembly 3.
  • step S7A it is determined whether the air conditioning system meets the defrost-free mode termination condition. If the air conditioning system does not meet the defrost-free mode termination condition, the process returns to step S6A; if the air conditioning system meets the defrost mode termination condition, the process turns to step S8A.
  • the defrost-free mode termination condition includes: the minimum value Tg2min in Tg2 ⁇ f and the duration is g seconds. For example, 0°C ⁇ f ⁇ 10°C.
  • the value of f may be 0°C, 2°C, 4°C, 6°C, 8°C, or 10°C, etc.
  • the value of g can be 5 seconds, 10 seconds, 15 seconds, 20 seconds, 25 seconds or 30 seconds, etc.
  • the temperature of the second portion 32 can be relatively high, and a certain amount of heat can be retained. At this time, even if the second portion 32 is no longer heated, it is difficult for the second portion 32 to frost.
  • step S8A the air conditioning system 100 is controlled to operate in a defrost mode.
  • step S8A the above-mentioned control of the air conditioning system 100 to operate in the defrost mode includes: in the outdoor unit 20, controlling the first valve port 61 to be connected with the second valve port 62, and the third valve port 63 to be connected with the fourth valve port 64. Adjusting the first throttle valve 51 to a fully closed state, adjusting the second throttle valve 52 to a fully closed state, and adjusting the third throttle valve 53 to a throttling state to control the suction/exhaust superheat of the compressor 21, controlling the second on-off valve 54 to switch to an open state, controlling the first on-off valve 55 to switch to an open state, and controlling the outdoor fan 22 to work.
  • Tssh2 Tg2-Tcps, where Tg2 is the air pipe temperature of the second part 32.
  • a portion of the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 can flow into the reversing assembly 6 through the first valve port 61, and flow out of the reversing assembly 6 from the second valve port 62.
  • the refrigerant flowing out of the second valve port 62 flows to the indoor heat exchanger 101, and after heat exchange in the indoor heat exchanger 101, it is cooled to a high-pressure and medium-temperature liquid refrigerant to heat the room.
  • the high-pressure and medium-temperature liquid refrigerant flows from the indoor heat exchanger 101 to the third throttle valve 53, is throttled, and flows into the second part 32, and is evaporated into a low-pressure liquid refrigerant in the second part 32.
  • the low-temperature and low-pressure gaseous refrigerant flows out from the second part 32, and flows back to the air intake port 211 of the compressor 21 through the second on-off valve 54, the third valve port 63 and the fourth valve port 64 in sequence.
  • Another part of the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 212 of the compressor 21 flows into the first part 31 through the fourth branch 44 and the first on-off valve 55, and the refrigerant flowing out of the first part 31 flows back to the air intake port 211 of the compressor 21 through the second on-off valve 54, the third valve port 63 and the fourth valve port 64 in sequence.
  • the first part 31 can be directly heated by utilizing the sensible high temperature of the refrigerant discharged from the compressor 21. In this way, the heating speed of the first part 31 can be accelerated, and then the temperature rise speed of the first part 31 can be increased. When the frost on the first part 31 is thick, the defrosting speed of the first part 31 can be increased.
  • step S8 the air conditioning system continues to heat the first portion 31 .
  • step S9 it is determined whether the air conditioning system meets the defrost mode termination condition. If the air conditioning system does not meet the defrost mode termination condition, the process returns to step S8; if the air conditioning system meets the defrost mode termination condition, the process turns to step S10.
  • the defrost mode end condition includes: the minimum value Tg1min in Tg1 ⁇ f and the duration is g seconds. For example, 0°C ⁇ f ⁇ 10°C, 5 seconds ⁇ g ⁇ 30 seconds.
  • the value of f may be 0°C, 2°C, 4°C, 6°C, 8°C, or 10°C, etc.
  • the value of g can be 5 seconds, 10 seconds, 15 seconds, 20 seconds, 25 seconds or 30 seconds, etc.
  • the temperature of the first portion 31 is relatively high and a certain amount of heat is retained. At this time, even if the first portion 31 is no longer heated, it is difficult for the first portion 31 to frost.
  • step S10 the air conditioning system is controlled to operate in a preset working mode.
  • the method for controlling the air conditioning system 100 to operate in the defrost-free mode further includes steps S210A to S230A.
  • S210A Detect the minimum value Pdmin of the exhaust pressure Pd at the exhaust port 212 of the compressor 21.
  • the rotation speed of the indoor fan 102 at the second preset wind speed is less than half of the maximum rotation speed of the indoor fan 102.
  • the value of h may be 1.5 MPa, 1.6 MPa, 1.8 MPa, 1.9 MPa or 2 MPa, etc.
  • the value of I can be 1 MPa, 1.1 MPa, 1.2 MPa, 1.3 MPa or 1.5 MPa, etc.
  • the indoor fan 102 has a wind speed of low, medium, and high.
  • the rotation speed of the indoor fan 102 at the high speed is the maximum rotation speed of the indoor fan 102 .
  • the rotation speed of the indoor fan 102 at a high speed is 3000 r/min
  • the rotation speed of the indoor fan 102 at the second preset wind speed must be less than 1500 r/min.
  • the frost risk of the outdoor heat exchanger assembly 3 can be judged according to the exhaust pressure Pd of the exhaust port 212 of the compressor 21, and the wind speed of the indoor fan 102 can be flexibly adjusted according to the frost risk of the outdoor heat exchanger assembly 3, so that the wind speed of the indoor fan 102 can be matched with the heating performance of the air-conditioning system. In this way, the heating capacity of the air-conditioning system can be maximized for indoor heating while avoiding frost on the outdoor heat exchanger assembly 3.
  • steps S210A to S230A include steps S71A to S76A.
  • step S71A the minimum value Pdmin of the discharge pressure at the discharge port of the compressor is detected.
  • step S72A it is determined whether Pdmin ⁇ h holds.
  • step S73 If so, go to step S73; if not, that is, I ⁇ Pdmin ⁇ h at this time, go to step S74.
  • step S73A the wind speed of the indoor fan 102 is controlled to be the first preset wind speed.
  • the exhaust pressure Pd of the exhaust port 212 of the compressor 21 is relatively large, and the heating performance of the air-conditioning system 100 is relatively good, which can reduce the risk of frosting of the outdoor heat exchanger assembly 3.
  • the refrigerant will have enough heat to enter the outdoor heat exchanger assembly 3 and be configured to increase the temperature of the outdoor heat exchanger assembly 3, thereby avoiding frosting of the outdoor heat exchanger assembly 3.
  • step S74A it is determined whether Pdmin ⁇ I holds.
  • the exhaust pressure Pd of the exhaust port 212 of the compressor 21 is relatively small, and the exhaust pressure Pd of the exhaust port 212 of the compressor 21 needs to be further detected to adjust the rotation speed of the indoor fan 102 according to the final detection result.
  • step S75A If so, go to step S75A; if not, go to step S76A.
  • step S75A the wind speed of the indoor fan 102 is controlled to be adjusted to the second preset wind speed.
  • the wind speed of the indoor fan 102 is controlled to the second preset wind speed, so that a small part of the heat in the refrigerant is configured to heat the indoor room, so that the refrigerant has enough heat to enter the outdoor heat exchanger assembly 3 and is configured to increase the temperature of the outdoor heat exchanger assembly 3, thereby avoiding frost on the outdoor heat exchanger assembly 3.
  • step S76A the indoor fan 102 is controlled to stop running.
  • the exhaust pressure Pd of the exhaust port 212 of the compressor 21 is small, the heating performance of the air-conditioning system 100 is poor, and the risk of frost on the outdoor heat exchanger assembly 3 is high.
  • the indoor fan 102 is controlled to stop running, so that a very small part of the heat in the refrigerant can be configured to heat the indoor temperature, so that most of the heat in the refrigerant enters the outdoor heat exchanger assembly 3 and is configured to increase the temperature of the outdoor heat exchanger assembly 3, thereby avoiding frost on the outdoor heat exchanger assembly 3.
  • the method for controlling the air conditioning system 100 to operate in the defrost-free mode further includes steps S210B to S230B.
  • step S210B the minimum value Tomin of the air outlet temperature of the indoor unit 10 is detected, and the minimum value Tlmin of the liquid pipe temperature of the indoor heat exchanger 101 is detected.
  • step S220B the minimum value Tomin of the air outlet temperature of the indoor unit 10 is compared with the first threshold temperature M1 and the second threshold temperature N1, and a comparison result is obtained; the minimum value Tlmin of the liquid pipe temperature of the indoor heat exchanger 101 is compared with the third threshold temperature M2 and the fourth threshold temperature N2, and a comparison result is obtained.
  • step S230B if Tomin ⁇ M1 or Tlmin ⁇ M2, the wind speed of the indoor fan 102 is controlled to be the first preset wind speed; if Tomin ⁇ N1 or Tlmin ⁇ N2, the indoor fan 102 is controlled to stop running; if N1 ⁇ Tomin ⁇ M1 and N2 ⁇ Tlmin ⁇ M2, the wind speed of the indoor fan 102 is controlled to be the second preset wind speed. Both the first preset wind speed and the second preset wind speed can be wind speeds set by the user.
  • the value of M1 may be 25°C, 28°C, 30°C, 32°C, 34°C, 35°C, etc.
  • the value of N1 may be 15°C, 17°C, 19°C, 21°C, 23°C, or 25°C, etc.
  • the value of M2 may be 20°C, 25°C, 30°C, 34°C, 38°C, or 40°C, etc.
  • the value of N2 may be 10°C, 14°C, 18°C, 20°C, 22°C or 25°C, etc.
  • the frost risk of the outdoor heat exchanger assembly 3 can be determined according to the air outlet temperature of the indoor unit 10 and the liquid pipe temperature of the indoor heat exchanger 101, and the windshield of the indoor fan 102 can be flexibly adjusted according to the frost risk of the outdoor heat exchanger assembly 3, so that the windshield of the indoor fan 102 can be matched with the heating performance of the air conditioning system 100. In this way, the heating capacity of the air conditioning system 100 can be maximized to heat the indoor room on the basis of avoiding frost on the outdoor heat exchanger assembly 3.
  • steps S210B to S230B include steps S71B to S76B.
  • step S71B the minimum value Tomin of the air outlet temperature of the indoor unit 10 is detected, and the minimum value Tlmin of the liquid pipe temperature of the indoor heat exchanger 101 is detected.
  • step S72B it is determined whether Tomin ⁇ M1 or Tlmin ⁇ M2 holds.
  • step S73B If so, go to step S73B; if not, go to step S74B.
  • step S73B the wind speed of the indoor fan 102 is controlled to be the first preset wind speed.
  • the air outlet temperature of the indoor unit 10 is relatively high
  • the liquid pipe temperature of the indoor heat exchanger 101 is relatively high
  • the heating performance of the air-conditioning system 100 is relatively good, which can reduce the risk of frosting of the outdoor heat exchanger assembly 3.
  • the refrigerant will have enough heat to enter the outdoor heat exchanger assembly 3 and be configured to increase the temperature of the outdoor heat exchanger assembly 3, thereby avoiding frosting of the outdoor heat exchanger assembly 3.
  • step S74B it is determined whether Tomin ⁇ N1 or Tlmin ⁇ N2 holds.
  • the air outlet temperature of the indoor unit 10 is low, and the liquid pipe temperature of the indoor heat exchanger 101 is low. It is necessary to further detect the minimum value Tomin of the air outlet temperature of the indoor unit 10 and the minimum value Tlmin of the liquid pipe temperature of the indoor heat exchanger 101 to adjust the speed of the indoor fan 102 according to the final detection result.
  • step S75B If so, go to step S75B; if not, go to step S76B.
  • step S75B the wind speed of the indoor fan 102 is controlled to be the second preset wind speed.
  • the wind speed of the indoor fan 102 is controlled to be the second preset wind speed, so that a small part of the heat in the refrigerant is configured to heat the indoor room, so that the refrigerant has enough heat to enter the outdoor heat exchanger component 3, and is configured to increase the temperature of the outdoor heat exchanger component 3. degree, thereby preventing frost on the outdoor heat exchanger assembly 3.
  • step S76B the indoor fan 102 is controlled to stop operating.
  • the indoor fan 102 is controlled to stop running, so that a small part of the heat in the refrigerant can be configured to heat the indoor room, so that most of the heat in the refrigerant enters the outdoor heat exchanger assembly 3, and is configured to increase the temperature of the outdoor heat exchanger assembly 3 to avoid frost on the outdoor heat exchanger assembly 3.
  • the controller 40 is further configured to: when the air conditioning system 100 operates in the heating mode, if the outdoor ambient temperature detected by the third temperature sensor 78 of any outdoor unit 20 is less than or equal to the first temperature threshold A, any one of Te1 of the outdoor unit 20 and Te2 of the outdoor unit 20 is less than or equal to the second temperature threshold B, and the continuous operation time of the air conditioning system 100 in the heating mode reaches the first set time, then it is determined that the air conditioning system 100 meets the defrosting condition, and the air conditioning system 100 is controlled to operate in the first defrosting mode or the second defrosting mode; for example, when the air conditioning system 100 operates in the first defrosting mode, the air conditioning system 100 defrosts at least one first part 31, and when the air conditioning system 100 operates in the second defrosting mode, the air conditioning system 100 defrosts at least one second part 32. In this way, it is possible to accurately determine whether the air conditioning system 100 is defrosting, which is conducive to improving the sensitivity and reliability of defrosting of the
  • the air conditioning system 100 when the air conditioning system 100 includes one outdoor unit 20, the outdoor ambient temperature detected by the third temperature sensor 78 of the outdoor unit 20 is less than or equal to the first temperature threshold A, and any one of Te1 and Te2 of the outdoor unit 20 is less than or equal to the second temperature threshold B, the air conditioning system 100 is controlled to run the defrost mode.
  • the air conditioning system 100 includes multiple (greater than or equal to 2) outdoor units 20, the outdoor ambient temperature Ta detected by the third temperature sensor 78 of any outdoor unit 20 is less than or equal to the first temperature threshold A, and any one of Te1 of multiple outdoor units 20 and Te2 of multiple outdoor units 20 is less than or equal to the second temperature threshold B
  • the controller 40 controls the air conditioning system 100 to run the defrost mode. That is, the temperature parameter that triggers the air conditioning system 100 to enter the defrost mode can come from the parameter detected by the detection component of the same outdoor unit 20, or can come from the parameters detected by the detection components of different outdoor units 20.
  • the first temperature threshold A can take a value in the range of -7°C to 7°C.
  • the first temperature threshold A can be -6°C, -5°C, -4°C, -3°C, -2°C, -1°C, 0°C, 1°C, 2°C, 3°C, 4°C, 5°C or 6°C, etc.
  • the second temperature threshold B may be in the range of -5°C to 0°C, and the second temperature threshold B may be -5°C, -4°C, -3°C, -2°C, -1°C or 0°C, etc.
  • the first set time length is greater than or equal to 10 minutes.
  • the first set time length may be 10 minutes, 11 minutes, 12 minutes, 13 minutes, or 14 minutes.
  • the air-conditioning system 100 can defrost the first part 31 of one outdoor unit 20, or defrost the first parts 31 of some outdoor units 20 at the same time, or defrost the first parts 31 of multiple outdoor units 20 at the same time.
  • the air-conditioning system 100 can defrost the second part 32 of one outdoor unit 20, or can defrost the second parts 32 of some outdoor units 20 at the same time, or can defrost the second parts 32 of multiple outdoor units 20 at the same time.
  • the second end of the fifth branch 45 of the outdoor unit 20 is connected to the second end of the second part 32, and the second end of the first branch 41 is connected to the first end of the second part 321.
  • the fourth temperature sensor 76 is disposed at the first end of the first part 31, and is configured to detect the temperature Tg1 of the first end of the first part 31; the controller 40 is electrically connected to the fourth temperature sensor 76, and the controller 40 is further configured to: when the air conditioning system 100 runs the first defrost mode, if the Tg1 of at least one first part 31 is greater than or equal to the third temperature threshold C and lasts for a second set time, it is determined that the air conditioning system 100 has completed defrosting at least one first part 31, and the air conditioning system 100 is controlled to exit the first defrost mode. In this way, the first defrost mode can be exited in time when the end condition of the first defrost mode is met, which is conducive to improving the intelligence and reliability
  • the controller 40 controls the air conditioning system 100 to exit the first defrost mode.
  • the second end of the fifth branch 45 of the outdoor unit 20 is connected to the second end of the second part 32, and the second end of the first branch 41 is connected to the first end of the second part 321.
  • the fifth temperature sensor 77 is arranged at the first end of the second part 32, and is configured to detect the temperature Tg2 of the first end of the second part; the controller 40 is electrically connected to the fifth temperature sensor 77, and the controller 40 is further configured to: when the air conditioning system 100 runs the second defrost mode, if the Tg2 of at least one second part 32 is greater than or equal to the third temperature threshold C and lasts for a second set time, it is determined that the air conditioning system 100 has completed defrosting at least one second part 32, and the air conditioning system 100 is controlled to exit the second defrost mode. In this way, the second defrost mode can be exited in time when the end condition of the second defrost mode is met, which is conducive to improving the intelligence and reliability of the air conditioning system 100.
  • the third temperature threshold C can be in the range of 10°C to 25°C.
  • the third temperature threshold C can be 10°C, 11°C, 12°C, 13°C, 14°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C, 21°C, 22°C, 23°C, 24°C or 25°C, etc.
  • the second set time length may be in the range of 5 seconds to 30 seconds.
  • the second set time length may be 5 seconds, 10 seconds, 15 seconds, 20 seconds, 25 seconds or 30 seconds.
  • the first pressure sensor 71 is disposed at the air inlet 211 of the compressor 21, and the controller 40 is electrically connected to the first pressure sensor 71.
  • the controller 40 is further configured to: when the air conditioning system 100 defrosts the first part 31 of an outdoor unit 20, obtain the maximum air inlet pressure Psmax of the air inlet 211 of the outdoor unit 20; when the air conditioning system defrosts the second part 32 of an outdoor unit 20, adjust the flow rate of the throttling component 56 of the outdoor unit 20 so that P2 satisfies the second preset condition, and the second preset condition includes: the condensation pressure P2 of the second part 32 ⁇ Psmax, P2 is the saturation pressure corresponding to K1*Tg2+K2*Te2, 0.5 ⁇ K1 ⁇ 0.9, 0.1 ⁇ K2 ⁇ 0.5. In this way, the condensation temperature in the second part 32 can be made greater than 0°C, ensuring the defrosting speed and defrosting effect of the second part
  • specific parameter values may be set, such as making P2 greater than 0.7 MPa (corresponding to a saturation temperature of 0°C), for example, P2 may be greater than or equal to 1.0 MPa and less than or equal to 1.2 MPa. In this way, the defrosting speed and defrosting effect of the second part 32 may be ensured, and the heating performance of the air conditioning system may be ensured, thereby improving the user's comfort.
  • the fourth temperature threshold D may be in the range of 20°C to 30°C, such as 20°C, 25°C, 30°C, etc.
  • the value of ⁇ T may be 10°C, 15°C, 20°C, 25°C, 30°C, etc.
  • the second pressure sensor 72 is disposed at the exhaust port 212 of the compressor 21, and the sixth temperature sensor 73 is disposed at the exhaust port 212 of the compressor 21.
  • the controller 40 is electrically connected to both the second pressure sensor 72 and the sixth temperature sensor 73, and the controller 40 is further configured to: when the air conditioning system 100 defrosts the first part 31 of an outdoor unit 20, adjust the flow rate of the third throttle valve 53 of an outdoor unit 20 so that the suction superheat Tssh and the exhaust superheat Tdsh of the compressor 21 meet the third preset condition.
  • the third preset condition includes: the suction superheat Tssh of the compressor 21 of the outdoor unit 20 is greater than or equal to the fifth temperature threshold E, and the exhaust superheat Tdsh of the compressor 21 is greater than or equal to the sixth temperature threshold F.
  • Tssh Tg2-Tc_ps
  • Tc_ps the saturation temperature corresponding to the suction pressure Ps at the suction port 211
  • Tdsh Td-Tc_pd
  • Td is the temperature of the exhaust port 212 of the compressor 21
  • Tc_pd is the saturation temperature corresponding to the exhaust pressure Pd at the exhaust port 212.
  • the compressor 21 can be prevented from being compressed with liquid, which is conducive to improving the reliability of the air conditioning system 100.
  • the controller 40 is further configured to: when the air-conditioning system 100 defrosts the second part 32 of an outdoor unit 20, adjust the flow rate of the second throttle valve 52 of an outdoor unit 20 so that the suction superheat Tssh and the exhaust superheat Tdsh of the compressor 21 meet the third preset condition.
  • the sixth temperature threshold F can take a value in the range of 0°C to 10°C.
  • the sixth temperature threshold F can be 0°C, 1°C, 2°C, 3°C, 4°C, 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, etc.
  • the fifth temperature threshold E may be within the range of 20°C to 40°C, for example, the fifth temperature threshold E may be 20°C, 25°C, 30°C, 35°C or 40°C.
  • the air conditioning system 100 is a multi-split air conditioning system 100, and the multi-split air conditioning system 100 includes N outdoor units 20, and the N outdoor units 20 are connected in parallel between the first end and the second end of the indoor heat exchanger 101.
  • N For example, N ⁇ 2.
  • the performance of the air conditioning system 100 can be improved, and the user experience can be improved.
  • the controller 40 is further configured to: when the air conditioning system 100 is controlled to run the first defrost mode, the air conditioning system 100 is controlled to defrost the N first parts 31 of the N outdoor units 20; when the air conditioning system is controlled to run the second defrost mode, the air conditioning system 100 is controlled to defrost the N second parts 32 of the N outdoor units 20.
  • the total time required to complete the defrosting of the N outdoor units 20 is short, and the control is simple.
  • a single module control logic for defrosting a single outdoor unit 20 can be used.
  • the states of the N outdoor units 20 are consistent, which can prevent the occurrence of serious frost on some outdoor units 20. Flow deviation between outdoor units.
  • the controller 40 is further configured to: obtain the defrosting order of the N outdoor units 20; control the air conditioning system 100 to alternately operate the first defrosting mode and the second defrosting mode, so as to sequentially defrost the outdoor heat exchanger components 3 of the N outdoor units 20 according to the defrosting order; for example, when the air conditioning system 100 is controlled to operate the first defrosting mode, the air conditioning system 100 is controlled to defrost the first part 31 of an outdoor unit 20, and when the air conditioning system 100 is controlled to operate the second defrosting mode, the air conditioning system 100 is controlled to defrost the second part 32 of an outdoor unit.
  • the air conditioning system 100 completes defrosting of the first part 31 and the second part 32 of an outdoor unit 20
  • the first part 31 and the second part 32 of the next outdoor unit 20 are defrosted until the first part 31 and the second part 32 of the N outdoor units 20 are defrosted.
  • the first part 31 may be defrosted first, or the second part 32 may be defrosted first. In this way, during defrosting, a greater number of evaporators are used for heating, and the heating performance of the air-conditioning system 100 is stronger.
  • some embodiments of the present disclosure further provide a defrost control method for an air-conditioning system, please refer to FIG. 33 , the defrost control method includes steps S1B to S6B.
  • step S1B the air conditioning system is controlled to operate in a heating mode.
  • the air-conditioning system 100 when the air-conditioning system 100 operates in the heating mode, the first valve port 61 and the second valve port 62 of the reversing assembly 6 of each outdoor unit 20 are controlled to be connected, the third valve port 63 and the fourth valve port 64 are controlled to be connected, the second on-off valve 54 is controlled to switch to an open state, the second throttle valve 52 is adjusted to a throttling state, the third throttle valve 53 is adjusted to a throttling state, the throttling assembly 56 is adjusted to a fully closed state, the first on-off valve 55 is controlled to switch to a closed state, and the first throttle valve 51 is adjusted to a fully closed state.
  • step S2B it is determined whether the air conditioning system meets the defrosting condition.
  • the defrosting condition includes the outdoor ambient temperature, the operating time of the air conditioning system 100, and the temperature of at least one first part or the temperature of at least one second part.
  • step S3B the air conditioning system is controlled to operate in the first defrosting mode.
  • the air conditioning system 100 can defrost at least one first part 31.
  • the second throttle valve 52 of the outdoor unit 20 is adjusted to a fully closed state, and the first on-off valve 55 is controlled to switch to an open state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the first part 31 is as described above, and will not be repeated here.
  • the outdoor unit 20 includes the first temperature sensor 74, the second temperature sensor 75 and the third temperature sensor 78
  • the air conditioning system 100 when the air conditioning system 100 operates in the heating mode, if the outdoor ambient temperature detected by the third temperature sensor 78 of any outdoor unit 20 is less than or equal to the first temperature threshold A, any one of Te1 of the outdoor unit 20 and Te2 of the outdoor unit 20 is less than or equal to the second temperature threshold B, and the continuous operation time of the air conditioning system 100 in the heating mode reaches the first set time, it is determined that the air conditioning system 100 meets the defrosting condition.
  • the values of the first temperature threshold A, the second temperature threshold B and the first set time are as described above and will not be repeated.
  • step S4B it is determined whether the air conditioning system meets the first defrost mode end condition.
  • step S3B If the air-conditioning system 100 does not meet the first defrost mode end condition, the process returns to step S3B; if the air-conditioning system 100 meets the first defrost mode end condition, the process goes to step S5B.
  • step S5B the air conditioning system is controlled to operate in the second defrost mode.
  • the air conditioning system can defrost at least one second part 32.
  • the second on-off valve 54 of the outdoor unit 20 currently running the first defrost mode is controlled to switch to a closed state
  • the second throttle valve 52 is adjusted to a throttle state
  • the third throttle valve 53 is adjusted to a fully closed state
  • the throttle assembly 56 is adjusted to a throttle state
  • the first on-off valve 55 is controlled to switch to a closed state
  • the first throttle valve 51 is adjusted to a throttle state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the second part 32 is as described above, and will not be repeated here.
  • the second end of the fifth branch 45 of the outdoor unit 20 is connected to the second end of the second part 32, and the second end of the first branch 41 is connected to the first end of the second part 321.
  • the outdoor unit 20 includes the fourth temperature sensor 76, when the air conditioning system 100 operates in the first defrost mode, if Tg1 of at least one first part 31 is greater than or equal to the third temperature threshold C and lasts for the second set time, it is determined that the air conditioning system 100 has completed defrosting at least one first part 31, that is, it is determined that the air conditioning system 100 meets the first defrost mode end condition.
  • the third temperature threshold C and the second set time are as described above and will not be repeated.
  • step S6B it is determined whether the air conditioning system satisfies the second defrost mode end condition.
  • step S5B If the air-conditioning system 100 does not meet the second defrost mode termination condition, the process returns to step S5B; if the air-conditioning system 100 meets the second defrost mode termination condition, the process exits the second defrost mode and the process returns to step S1B.
  • the refrigerant flow direction of the outdoor unit 20 for defrosting the second part 32 is as described above and will not be repeated here.
  • the air conditioning system 100 may also operate in other modes, such as air supply mode, after exiting the second defrost mode.
  • the second end of the fifth branch 45 of the outdoor unit 20 is connected to the second end of the second part 32, and the second end of the first branch 41 is connected to the first end of the second part 321.
  • the outdoor unit 20 includes the fifth temperature sensor 77
  • Tg2 of at least one second part 32 is greater than or equal to the third temperature threshold C and lasts for the second set time, it is determined that the air conditioning system 100 has completed defrosting at least one second part 32, that is, it is determined that the air conditioning system 100 meets the second defrost mode end condition.
  • the third temperature threshold C and the second set time are as described above and will not be repeated.
  • the defrost control method of the air-conditioning system 100 further includes steps S1C to S6C.
  • step S1C the air conditioning system is controlled to operate in a heating mode.
  • the controller 40 controls the first valve port 61 of the reversing assembly 6 to be connected to the second valve port 62, and the third valve port 63 to be connected to the fourth valve port 64, controls the second on-off valve 54 to switch to an open state, adjusts the second throttle valve 52 to a throttling state, adjusts the third throttle valve 53 to a throttling state, adjusts the throttling assembly 56 to a fully closed state, controls the first on-off valve 55 to switch to a closed state, and adjusts the first throttle valve 51 to a fully closed state.
  • step S2C it is determined whether the air conditioning system meets the defrosting condition.
  • the defrosting condition includes the outdoor ambient temperature, the operating time of the air conditioning system 100, and the temperature of at least one first part or the temperature of at least one second part.
  • step S3C the air conditioning system is controlled to operate in the second defrost mode.
  • the air conditioning system 100 can defrost at least one second part 32.
  • the second on-off valve 54 of the control outdoor unit 20 is switched to a closed state
  • the third throttle valve 53 is adjusted to a closed state
  • the throttle assembly 56 is adjusted to a throttle state
  • the first throttle valve 51 is adjusted to a throttle state.
  • the refrigerant flow direction in the outdoor unit 20 for defrosting the second part 32 is as described above, and will not be repeated here. It is determined that the air conditioning system 100 meets the defrost mode end condition as described above, and will not be repeated here.
  • step S4C it is determined whether the air conditioning system meets the second defrost mode end condition.
  • step S3C If the air conditioning system 100 does not meet the second defrost mode end condition, return to step S3C; if the air conditioning system 100 meets the second defrost mode end condition, turn to step S5C. Determining whether the air conditioning system 100 meets the second defrost mode end condition is as described above and will not be repeated here.
  • step S5C the air conditioning system is controlled to operate in the first defrost mode.
  • the air conditioning system can defrost at least one first part 31.
  • the second on-off valve 54 of the outdoor unit 20 currently running the second defrost mode is controlled to switch to an open state
  • the second throttle valve 52 is adjusted to a fully closed state
  • the third throttle valve 53 is adjusted to a throttling state
  • the throttling assembly 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to switch to an open state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the first part 31 is as described above, and will not be repeated here.
  • step S6C it is determined whether the air conditioning system meets the first defrost mode end condition.
  • step S5C If the air conditioning system 100 does not meet the first defrost mode end condition, return to step S5C; if the air conditioning system meets the first defrost mode end condition, exit the first defrost mode and return to step S1C. Determining whether the air conditioning system 100 meets the first defrost mode end condition is as described above and will not be repeated here.
  • the second throttle valve 52 of the outdoor unit 20 currently running the first defrost mode is adjusted to the throttling state, and the first on-off valve 55 is controlled to switch to the closed state.
  • the refrigerant flow direction of the outdoor unit 20 for defrosting the second part 32 is as described above, and will not be repeated here.
  • the air conditioning system 100 may also operate in other modes, such as air supply mode, after exiting the first defrost mode.
  • air supply mode When the air conditioning system 100 operates in the air supply mode, the compressor unit works, and neither the indoor heat exchanger nor the outdoor heat exchanger assembly exchanges heat with the air.
  • the indoor fan 102 operates to supply air to the room to increase the fluidity of the indoor air.
  • the beneficial technical effects of the defrost control method of the air-conditioning system 100 provided in some embodiments of the present disclosure are the same as the beneficial technical effects of the air-conditioning system 100 provided in some embodiments of the present disclosure, and will not be repeated here.
  • the number of outdoor units 20 of the air conditioning system 100 is multiple.
  • Fig. 35 takes the number of outdoor units 20 as two as an example to illustrate the defrost control method.
  • the defrost control method includes steps S10A to S60A.
  • step S10A the air conditioning system is controlled to operate in a heating mode.
  • the first valve port 61 of the control reversing assembly 6 of each outdoor unit 20 is controlled to be connected to the second valve port 62
  • the third valve port 63 is controlled to be connected to the fourth valve port 64
  • the second on-off valve 54 is controlled to switch to an open state
  • the second throttle valve 52 is adjusted to a throttling state
  • the third throttle valve 53 is adjusted to a throttling state
  • the throttling assembly 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to switch to a closed state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • step S20A it is determined whether the air conditioning system meets the defrosting condition.
  • step S10A If the air conditioning system 100 does not meet the defrosting condition, the process returns to step S10A. If the air conditioning system 100 meets the defrosting condition, the process returns to step S10A. S30A.
  • step S30A the air conditioning system is controlled to operate in the first defrost mode.
  • the air conditioning system 100 can simultaneously defrost the first part 31 of the first outdoor unit 20 and the first part 31 of the second outdoor unit 20.
  • the second throttle valve 52 of each outdoor unit 20 is adjusted to a fully closed state, and the first on-off valve 55 is controlled to switch to an open state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the first part 31 is as described above, and will not be repeated here.
  • step S40A it is determined whether the air conditioning system meets the first defrost mode end condition.
  • step S30A If the air conditioning system 100 does not meet the first defrost mode end condition, return to step S30A; if the air conditioning system 100 meets the first defrost mode end condition, turn to step S50A. Determining whether the air conditioning system 100 meets the first defrost mode end condition is as described above and will not be repeated here.
  • step S50A the air conditioning system 100 is controlled to operate in the second defrosting mode.
  • the air conditioning system 100 can simultaneously defrost the second part 32 of the first outdoor unit 20 and the second part 32 of the second outdoor unit 20.
  • the second on-off valve 54 of each outdoor unit 20 is controlled to switch to a closed state
  • the second throttle valve 52 is adjusted to a throttle state
  • the third throttle valve 53 is adjusted to a fully closed state
  • the throttle assembly 56 is adjusted to a throttle state
  • the first on-off valve 55 is controlled to switch to a closed state
  • the first throttle valve 51 is adjusted to a throttle state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the second part 32 is as described above, and will not be repeated here.
  • step S60A it is determined whether the air conditioning system satisfies the second defrost mode end condition.
  • step S50A If the air conditioning system 100 does not meet the second defrost mode end condition, return to step S50A; if the air conditioning system 100 meets the second defrost mode end condition, exit the second defrost mode and return to step S10A. Determining whether the air conditioning system 100 meets the second defrost mode end condition is as described above and will not be repeated here.
  • the air conditioning system 100 can also run other modes, such as the air supply mode, after exiting the second defrosting mode.
  • the number of outdoor units 20 of the air conditioning system 100 is multiple.
  • Fig. 36 takes the number of outdoor units 20 as two as an example to illustrate the defrost control method.
  • the defrost control method includes steps S10B to S60B.
  • step S10B the air conditioning system is controlled to operate in a heating mode.
  • the air-conditioning system 100 when the air-conditioning system 100 is controlled to operate in the heating mode, the first valve port 61 and the second valve port 62 of the reversing assembly 6 of each outdoor unit 20 are controlled to be connected, the third valve port 63 and the fourth valve port 64 are controlled to be connected, the second on-off valve 54 is controlled to switch to an open state, the second throttle valve 52 is adjusted to a throttling state, the third throttle valve 53 is adjusted to a throttling state, the throttling assembly 56 is adjusted to a fully closed state, the first on-off valve 55 is controlled to switch to a closed state, and the first throttle valve 51 is adjusted to a fully closed state.
  • step S20B it is determined whether the air conditioning system meets the defrosting condition.
  • step S10B If the air-conditioning system 100 does not meet the defrosting condition, the process returns to step S10B; if the air-conditioning system 100 meets the defrosting condition, the process goes to step S30B.
  • step S30B the air conditioning system is controlled to operate in the second defrost mode.
  • the air conditioning system can simultaneously defrost the second part 32 of the first outdoor unit 20 and the second part 32 of the second outdoor unit 20.
  • the second on-off valve 54 of each outdoor unit 20 is controlled to switch to a closed state
  • the third throttle valve 53 is adjusted to a closed state
  • the throttle assembly 56 is adjusted to a throttle state
  • the first throttle valve 51 is adjusted to a throttle state.
  • the refrigerant flow direction in the outdoor unit 20 for defrosting the second part 32 is as described above, and will not be repeated here.
  • step S40B it is determined whether the air conditioning system meets the second defrost mode end condition.
  • step S30B If the air conditioning system 100 does not meet the second defrost mode end condition, return to step S30B; if the air conditioning system 100 meets the second defrost mode end condition, turn to step S50B. Determining whether the air conditioning system 100 meets the second defrost mode end condition is as described above and will not be repeated here.
  • step S50B the air conditioning system 100 is controlled to operate in the first defrosting mode.
  • the air conditioning system can simultaneously defrost the first part 31 of the first outdoor unit 20 and the first part 31 of the second outdoor unit 20.
  • the second on-off valve 54 of each outdoor unit 20 is controlled to switch to an open state
  • the second throttle valve 52 is adjusted to a fully closed state
  • the third throttle valve 53 is adjusted to a throttling state
  • the throttling assembly 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to switch to an open state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • the refrigerant flow direction of the outdoor unit 20 that defrosts the first part 31 is as described above, and will not be repeated here.
  • step S60B it is determined whether the air conditioning system 100 satisfies the first defrost mode end condition.
  • step S50B If the air conditioning system 100 does not meet the first defrost mode end condition, return to step S50B; if the air conditioning system 100 meets the first defrost mode end condition, exit the first defrost mode and return to step S10B. Determining whether the air conditioning system 100 meets the first defrost mode end condition is as described above and will not be repeated here.
  • the refrigerant flow direction of the outdoor unit 20 for defrosting the second part 32 is as described above and will not be repeated here.
  • the air conditioning system 100 may also operate in other modes, such as air supply mode, after exiting the first defrost mode.
  • the number of outdoor units 20 of the air conditioning system 100 is multiple.
  • Fig. 37 takes the number of outdoor units 20 as two as an example to illustrate the defrost control method.
  • the defrost control method includes steps S100A to S1000A.
  • step S100A the air conditioning system 100 is controlled to operate in a heating mode.
  • the first valve port 61 of the control reversing assembly 6 of each outdoor unit 20 is controlled to be connected to the second valve port 62
  • the third valve port 63 is controlled to be connected to the fourth valve port 64
  • the second on-off valve 54 is controlled to switch to an open state
  • the second throttle valve 52 is adjusted to a throttling state
  • the third throttle valve 53 is adjusted to a throttling state
  • the throttling assembly 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to switch to a closed state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • step S200A it is determined whether the air conditioning system 100 meets the defrosting condition.
  • step S100A If the air-conditioning system 100 does not meet the defrosting condition, the process returns to step S100A; if the air-conditioning system 100 meets the defrosting condition, the process goes to step S300A.
  • step S300A the air conditioning system 100 is controlled to operate in a first defrosting mode to defrost a first part of a first outdoor unit.
  • the second throttle valve 52 of the first outdoor unit 20 is adjusted to a fully closed state, and the first on-off valve 55 is controlled to switch to an open state.
  • the refrigerant flow direction of the first outdoor unit 20 is as described above, and will not be repeated here.
  • step S400A it is determined whether the air conditioning system meets the first defrost mode end condition.
  • step S300A If the air conditioning system does not meet the first defrost mode end condition, return to step S300A; if the air conditioning system meets the first defrost mode end condition, turn to step S500A. Determining whether the air conditioning system 100 meets the first defrost mode end condition is as described above and will not be repeated here.
  • step S500A the air conditioning system 100 is controlled to run the second defrosting mode to defrost the second part of the first outdoor unit.
  • the second on-off valve 54 of the first outdoor unit 20 is controlled to switch to a closed state
  • the second throttle valve 52 is adjusted to a throttling state
  • the third throttle valve 53 is adjusted to a fully closed state
  • the throttling assembly 56 is adjusted to a throttling state
  • the first on-off valve 55 is controlled to switch to a closed state
  • the first throttle valve 51 is adjusted to a throttling state.
  • the refrigerant flow direction of the first outdoor unit 20 is as described above, and will not be repeated here.
  • step S600A it is determined whether the air conditioning system meets the second defrost mode end condition.
  • step S500A If the air conditioning system does not meet the second defrost mode end condition, return to step S500A; if the air conditioning system meets the second defrost mode end condition, turn to step S700A. Determining whether the air conditioning system 100 meets the second defrost mode end condition is as described above and will not be repeated here.
  • step S700A the air conditioning system is controlled to operate in a first defrosting mode to defrost a first part of the second outdoor unit.
  • control the second on-off valve 54 of the first outdoor unit 20 to switch to an open state adjust the third throttle valve 53 to a throttling state, adjust the throttling assembly 56 to a fully closed state, and adjust the first throttle valve 51 to a fully closed state; adjust the second throttle valve 52 of the second outdoor unit 20 to a fully closed state, and control the first on-off valve 55 to switch to an open state.
  • the air conditioning system is controlled to defrost the first part 31 of the second outdoor unit 20, the first outdoor unit 20 and the indoor heat exchanger 101 are controlled to operate in a heating mode. At this time, the refrigerant flow direction of the second outdoor unit 20 is as described above and will not be repeated here.
  • step S800A it is determined whether the air conditioning system meets the first defrost mode end condition.
  • step S700A If the air-conditioning system does not meet the first defrost mode end condition, return to step S700A; if the air-conditioning system meets the first defrost mode end condition, go to step S900A.
  • the air conditioning system 100 meets the termination condition of the first defrost mode as described above and will not be repeated here.
  • step S900A the air conditioning system is controlled to operate in a second defrost mode to defrost the second part of the second outdoor unit.
  • the second on-off valve 54 of the second outdoor unit 20 is controlled to switch to the closed state
  • the second throttle valve 52 is adjusted to the throttle state
  • the third throttle valve 53 is adjusted to the fully closed state
  • the throttle assembly 56 is adjusted to the throttle state
  • the first on-off valve 55 is controlled to switch to the closed state
  • the first throttle valve 51 is adjusted to the throttle state.
  • the refrigerant flow direction of the second outdoor unit 20 is as described above, which will not be repeated here.
  • step S1000A it is determined whether the air conditioning system meets the second defrost mode end condition.
  • step S900A If the air conditioning system does not meet the second defrost mode end condition, return to step S900A; if the air conditioning system meets the second defrost mode end condition, return to step S1000A.
  • the air conditioning system 100 meets the second defrost mode end condition as described above, which will not be repeated here.
  • the number of outdoor units 20 of the air conditioning system 100 is multiple.
  • Fig. 38 takes the number of outdoor units 20 as two as an example to illustrate the defrost control method.
  • the defrost control method includes steps S100B to S1000B.
  • S100B controls the air conditioning system to operate in heating mode.
  • the air conditioning system 100 when the air conditioning system 100 is in heating mode, the first valve port 61 of the control reversing assembly 6 of each outdoor unit 20 is connected to the second valve port 62, the third valve port 63 is connected to the fourth valve port 64, the second on-off valve 54 is controlled to switch to an open state, the second throttle valve 52 is adjusted to a throttling state, the third throttle valve 53 is adjusted to a throttling state, the throttling assembly 56 is adjusted to a fully closed state, and the first on-off valve 54 is adjusted to a fully closed state.
  • the valve 55 is in a closed state, and the first throttle valve 51 is adjusted to a fully closed state.
  • step S100B If the air-conditioning system 100 does not meet the defrosting condition, the process returns to step S100B; if the air-conditioning system 100 meets the defrosting condition, the process goes to step S300B.
  • the second on-off valve 54 of the first outdoor unit 20 is controlled to switch to the closed state, the third throttle valve 53 is adjusted to the closed state, the throttle assembly 56 is adjusted to the throttle state, and the first throttle valve 51 is adjusted to the throttle state.
  • the refrigerant flow direction in the first outdoor unit 20 is as described above, which will not be repeated here.
  • S400B Determine whether the air conditioning system meets the second defrost mode end condition.
  • step S300B If the air conditioning system does not meet the second defrost mode end condition, return to step S300B; if the air conditioning system meets the second defrost mode end condition, turn to step S500B.
  • the air conditioning system 100 meets the second defrost mode end condition as described above, which will not be repeated here.
  • S500B Control the air conditioning system to run the first defrost mode to defrost the first part of the first outdoor unit.
  • the second on-off valve 54 of the first outdoor unit 20 is controlled to be switched to an open state
  • the second throttle valve 52 is adjusted to a fully closed state
  • the third throttle valve 53 is adjusted to a throttling state
  • the throttling assembly 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to be switched to an open state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • the refrigerant flow direction of the first outdoor unit 20 is as described above, and will not be repeated here.
  • step S500B If the air conditioning system does not meet the first defrost mode termination condition, return to step S500B; if the air conditioning system meets the first defrost mode termination condition, turn to step S700B.
  • the air conditioning system 100 meets the first defrost mode termination condition as described above, which will not be repeated here.
  • the second throttle valve 52 of the first outdoor unit 20 is adjusted to the throttling state, the first on-off valve 55 is controlled to switch to the closed state; the second on-off valve 54 of the second outdoor unit 20 is controlled to switch to the closed state, the third throttle valve 53 is adjusted to the closed state, the throttling assembly 56 is adjusted to the throttling state, and the first throttle valve 51 is adjusted to the throttling state.
  • the refrigerant flow direction in the second outdoor unit 20 is as described above, and will not be repeated here.
  • the air conditioning system 100 is controlled to defrost the second part 32 of the second outdoor unit 20, the first outdoor unit 20 and the indoor heat exchanger 101 are controlled to operate in a heating mode.
  • step S700B If the air conditioning system does not meet the second defrost mode termination condition, return to step S700B; if the air conditioning system meets the second defrost mode termination condition, turn to step S900B.
  • the air conditioning system 100 meets the second defrost mode termination condition as described above, which will not be repeated here.
  • S900B Control the air conditioning system to run the first defrost mode and defrost the first part of the second outdoor unit.
  • the second on-off valve 54 of the second outdoor unit 20 is controlled to be switched to an open state
  • the second throttle valve 52 is adjusted to a fully closed state
  • the third throttle valve 53 is adjusted to a throttling state
  • the flow component 56 is adjusted to a fully closed state
  • the first on-off valve 55 is controlled to be switched to an open state
  • the first throttle valve 51 is adjusted to a fully closed state.
  • the refrigerant flow direction of the outdoor unit 20 for defrosting the first part 31 is as described above, and will not be repeated here.
  • S1000B Determine whether the air conditioning system meets the first defrost mode termination condition.
  • step S900B If the air conditioning system does not meet the first defrost mode end condition, return to step S900B; if the air conditioning system meets the first defrost mode end condition, return to step S100B.
  • the air conditioning system 100 meets the first defrost mode end condition as described above, which will not be repeated here.
  • the air-conditioning system 100 includes hardware structures and/or software modules corresponding to the execution of each function.
  • the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

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Abstract

一种空调系统(100),具有制冷模式、制热模式和免除霜模式。所述空调系统(100)包括:室内机(10)和室外机(20)。所述室内机(10)包括室内换热器(101)。所述室外机(20)包括:压缩机(21)、第一支路(41)和室外换热器组件(3)。所述压缩机(21)包括吸气口(211)和排气口(212)。所述室外换热器组件(3)包括第一部分(31)和第二部分(32),所述第一部分(31)通过所述第一支路(41)与所述第二部分(32)连通。其中,在所述空调系统(100)运行所述免除霜模式的情况下,所述室内换热器(101)与所述压缩机(21)的所述排气口(212)连通,且与所述第二部分(32)连通;所述第一部分(31)与所述压缩机(21)的所述吸气口(211)连通。所述第一部分(31)的至少部分和所述第二部分(32)的至少部分重叠,所述第二部分(32)被配置为与所述第一部分换热(31)。

Description

空调系统及其除霜控制方法
本申请要求于2023年05月05日提交的、申请号为CN202310506237.6;以及于2023年05月05日提交的、申请号为CN202310506368.4的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本公开涉及空调技术领域,尤其涉及一种空调系统及其除霜控制方法。
背景技术
空调系统在进行制热运转时,当外界环境的温度和湿度达到一定条件后,室外换热器组件会结霜,影响空调系统的性能。压缩机排出的冷媒可以供给室外换热器组件,从而利用冷媒的热量对室外换热器组件进行除霜。
发明内容
一方面,提供一种空调系统,所述空调系统包括:室内机和室外机。所述室内机包括室内换热器。所述室外机包括:压缩机、第一支路和室外换热器组件。所述压缩机包括吸气口和排气口。所述室外换热器组件包括第一部分和第二部分,所述第一部分通过所述第一支路与所述第二部分连通。其中,在所述空调系统运行所述免除霜模式的情况下,所述室内换热器与所述压缩机的所述排气口连通,且与所述第二部分连通;所述第一部分与所述压缩机的所述吸气口连通。所述第一部分的至少部分和所述第二部分的至少部分重叠,所述第二部分被配置为与所述第一部分换热。
另一方面,提供一种空调系统,包括控制器、室内换热器和室外机。所述室外机包括:压缩机、换向组件、室外换热器组件、第四支路、第五支路、第一支路、第一通断阀、第二通断阀、第一节流阀、第二节流阀、第三节流阀和节流组件。所述压缩机包括吸气口和排气口,所述换向组件包括第一阀口、第二阀口、第三阀口和第四阀口,所述第一阀口与所述排气口相连通,所述第四阀口与所述吸气口相连通。所述室外换热器组件包括第一部分和第二部分,所述第一部分的第一端与所述第三阀口相连通。所述第四支路的第一端与所述排气口相连通,所述第四支路的第二端与所述第一部分的第二端相连通。所述第五支路的第一端与所述排气口相连通,所述第一支路的第一端与所述第一部分的所述第二端相连通;所述第五支路的第二端和所述第一支路的第二端中的一者与所述第二部分的第二端相连通,另一者与所述第二部分的第一端相连通。所述第一通断阀设置于所述第四支路,所述第二通断阀设置于所述第二部分的所述第一端与所述第三阀口之间,所述第一节流阀设置于所述第一支路,所述节流组件设置于所述第五支路。所述室内换热器的第一端与所述第二阀口相连通;所述第二节流阀设置于所述室内换热器的第二端与所述第一部分的所述第二端之间,所述第三节流阀设置于所述室内换热器的所述第二端与所述第二部分的所述第二端之间。所述控制器与所述室内换热器和所述室外机均电连接,且被配置为:当控制所述空调系统对所述室外机的所述第一部分进行除霜时,控制所述室外机的所述第一阀口和所述第二阀口导通,所述第三阀口和所述第四阀口导通,所述第一通断阀和所述第二通断阀打开,所述第一节流阀和所述节流组件全关,所述第三节流阀节流;以及,当控制所述空调系统对所述室外机的所述第二部分进行除霜时,控制所述室外机的所述第一阀口和所述第二阀口导通,所述第三阀口和所述第四阀口导通,所述第一节流阀、所述第二节流阀和所述节流组件节流,所述第一通断阀和所述第二通断阀关闭。
又一方面,提供一种空调系统的除霜控制方法,所述除霜控制方法满足如下之一:所述除霜控制方法包括:在所述空调系统运行制热模式时,若所述空调系统满足除霜条件,控制所述空调系统运行第一除霜模式,以对所述室外机的所述第一部分进行除霜,其中,所述除霜条件包括室外环境温度、所述空调系统的运行时长,以及所述室外机的所述第一部分的温度或所述室外机的所述第二部分的温度;若所述空调系统对所述室外机的所述第一部分除霜完毕,控制所述空调系统退出所述第一除霜模式,并运行第二除霜模式,以对所述室外机的所述第二部分进行除霜;若所述空调系统对所述室外机的所述第二部分除霜完毕,控制所述空调系统退出所述第二除霜模式。或者,所述除霜控制方法包括:在所述空调系统运行制热模式时,若所述空调系统满足除霜条件,控制所述空调系统运行第二除霜模式,以对所述室外机的所述第二部分进行除霜,所述除霜条件包括室外环境温度、所述空调系统的运行时长,以及至少一个所述第一部分的温度或至少一个所述第二部分的温度;若所述空调系统对所述室外机的所述第二部分除霜完毕,控制所述空调系统退出所述第二除霜模式,并运行第一除霜模式,以对所述室外机的所述第一部分进行除霜;若所述空调系统对所述室外机的所述第一部分除霜完毕, 控制所述空调系统退出所述第一除霜模式。
附图说明
图1为根据一些实施例提供的一种空调系统的示意图;
图2为根据一些实施例提供的另一种空调系统的示意图;
图3为根据一些实施例提供的又一种空调系统的示意图;
图4为根据一些实施例提供的又一种空调系统的示意图;
图5为根据一些实施例提供的又一种空调系统的示意图;
图6为根据一些实施例提供的又一种空调系统的示意图;
图7为根据一些实施例提供的又一种空调系统的示意图;
图8为根据一些实施例提供的又一种空调系统的示意图;
图9为根据一些实施例提供的又一种空调系统的示意图;
图10为根据一些实施例提供的又一种空调系统的示意图;
图11为根据一些实施例提供的又一种空调系统的示意图;
图12为根据一些实施例提供的又一种空调系统的示意图;
图13为根据一些实施例提供的又一种空调系统的示意图;
图14为根据一些实施例提供的又一种空调系统的示意图;
图15为根据一些实施例提供的又一种空调系统的示意图;
图16为图4所示空调系统运行制冷模式时的示意图;
图17为图5所示空调系统运行制冷模式时的示意图;
图18为图4所示空调系统运行制热模式时的示意图;
图19为图5所示空调系统运行制热模式时的示意图;
图20为图4所示空调系统对第一部分进行除霜时的示意图;
图21为图5所示空调系统对第一部分进行除霜时的示意图;
图22为图4所示空调系统对第二部分进行除霜时的示意图;
图23为图5所示空调系统对第二部分进行除霜时的示意图;
图24为根据本公开一些实施例提供的一种空调系统的除霜控制方法的流程图;
图25为根据本公开一些实施例提供的另一种空调系统的除霜控制方法的流程图;
图26为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图27为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图28为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图29为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图30为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图31为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图32为根据本公开一些实施例提供的又一种空调系统的示意图;
图33为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图34为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图35为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图36为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图37为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图;
图38为根据本公开一些实施例提供的又一种空调系统的除霜控制方法的流程图。
具体实施方式
下面将结合附图,对本公开的一些实施例进行清楚、完整地描述,显然,所描述的实施例仅仅是本公开一部分实施例,而不是全部的实施例。基于本公开所提供的实施例,本领域普通技术人员所获得的所有其他实施例,都属于本公开保护的范围。
除非上下文另有要求,否则,在整个说明书和权利要求书中,术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思,即为“包含,但不限于”。在说明书的描述中,术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例 (example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外,所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开一些实施例的描述中,除非另有说明,“多个”的含义是两个或两个以上。
在描述一些实施例时,可能使用了“耦接”和“连接”及其衍伸的表达。术语“连接”应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或成一体;可以是直接相连,也可以通过中间媒介间接相连。术语“耦接”例如表明两个或两个以上部件有直接物理接触或电接触。术语“耦接”或“通信耦合(communicatively coupled)”也可能指两个或两个以上部件彼此间并无直接接触,但仍彼此协作或相互作用。这里所公开的实施例并不必然限制于本文内容。
“A和/或B”,包括以下三种组合:仅A,仅B,及A和B的组合。
本文中“适用于”或“被配置为”的使用意味着开放和包容性的语言,其不排除适用于或被配置为执行额外任务或步骤的设备。
另外,“基于”的使用意味着开放和包容性,因为“基于”一个或多个所述条件或值的过程、步骤、计算或其他动作在实践中可以基于额外条件或超出所述的值。
空调系统在进行制热运转时,当外界环境的温度和湿度达到一定条件后,室外换热器组件会结霜,这将会导致空调系统制热性能和供热量下降,影响用户的使用体验。并且在结霜后,空调系统会启动除霜程序对室外换热器组件进行除霜,目前主要有下述两种实现方式进行除霜。
在第一种实现方式中,空调系统采用逆向除霜的方式对室外换热器组件进行除霜,通过使制热中的冷媒逆向流动,将压缩机排出的冷媒供给到室外换热器组件,利用压缩机的热量对室外换热器组件进行除霜。逆向除霜时空调系统停止对室内制热,并且还需要室内换热器从室内吸收一部分热量,降低了室内的温度,影响了室内的热舒适性,降低了用户的使用体验。另外,逆向除霜方式还需要改变冷媒流向,特别是除霜后转为制热模式运行时,由于除霜过程中气液分离器中储存了大量冷媒,除霜后,压缩机启动时排气口的高压和吸气口的低压的压差建立缓慢,进而导致空调系统的制热能力下降,影响实时制热能力,以及室内的热舒适性。
在第二种实现方式中,空调系统采用旁通支路的方式对室外换热器组件进行除霜,通过在压缩机排气管设有旁通支路,并使旁通支路连通室外换热器组件进气管,在需要进行除霜运转时,压缩机排出的冷媒经旁通支路进入室外换热器组件除霜。但这种方式除霜时的热量来源仅为压缩机的压缩耗功,除霜可靠性差,除霜时间长。
在上述两种实现方式中,空调系统在进行除霜时,都会减少对室内的制热量,影响室内用户的热舒适度。
基于此,本公开提供一种空调系统,该空调系统可以运行免除霜模式。空调系统运行免除霜模式的过程中,可以避免室外换热器组件结霜,还可以使室内换热器不间断对室内制热,从而可以不再对室外组件进行除霜。下面对本公开提供的空调系统进行详细说明。
如图1和图2所示,本公开的一些实施例提供的空调系统100包括室内机10、室外机20和控制器40。室内机10包括室内换热器101,室外机20包括压缩机21、室外风机22、室外换热器组件3和第一支路41。
例如,空调系统100可以包括一个或多个室内机10,以及一个或多个室外机20。
例如,在图1中,空调系统100包括两个室内机10和一个室外机20。在图3中,空调系统100包括一个室内机10和两个室外机20。
例如,在空调系统100包括多个室内机10的情况下,多个室内机10的第一端相互连通,多个室内机10的第二端相互连通。在空调系统100包括多个室外机20的情况下,多个室外机20的第一端相互连通,多个室外机20的第二端相互连通。
例如,在空调系统100包括一个或多个室内换热器101的情况下,每个室内机包括一个室内换热器101。
如图3所示,压缩机21具有吸气口211和排气口212。例如,压缩机21的吸气口211被配置为吸 气,冷媒通过吸气口211进入到压缩机21的压缩腔内进行压缩,形成高温高压的冷媒,高温高压的冷媒气体再从压缩机21的排气口212排出压缩机21,进而进入到空调系统100内进行冷媒的循环。
例如,每个室外机20包括一个或多个压缩机21。
例如,压缩机21可以为涡旋压缩机、转子压缩机、螺杆压缩机或其它类型的压缩机。
例如,室外风机22被配置为加快室外换热器组件3周围的空气的流动速度,加快室外换热器组件3与周围空气的热交换速度。
例如,室外换热器组件3被配置为和室外的空气进行热交换。
在一些实施例中,如图3所示,室外换热器组件3包括第一部分31和第二部分32,第二部分32与第一部分31沿室外风机22工作时形成的气流方向依次设置。
例如,第一部分31和第二部分32分别为两个相互独立的换热器,在空调系统100运行制冷或制热模式时,可以避免空调系统因第一部分31和第二部分32中的一个发生损坏而停止工作,从而有利于提高空调系统100运行的稳定性和可靠性。或者,第一部分31和第二部分32分别为同一个换热器的两部分,这样,便于空调系统100的运输及装配,从而有利于提高空调系统100的装配效率。
例如,第一部分31位于第二部分32的一侧,在垂直于由第一部分31指向第二部分32的方向的平面内,第一部分31的至少部分和第二部分32的至少部分的投影重合。第二部分32被配置为与第一部分31换热。可以理解的是,第二部分32可以将热量传递给第一部分31。
例如,第一部分31和第二部分32可以沿水平方向设置。例如,第一部分31位于第二部分32在水平方向上的一侧。例如,在垂直于该水平方向的竖直面内,第一部分31的投影位于第二部分32的投影内。例如,在垂直于该水平方向的竖直面内,第二部分32的投影位于第二部分31的投影内。例如,在垂直于该水平方向的竖直面内,第一部分31的投影与第二部分32的投影重合。例如,第一部分31和第二部分32的间隔距离为L,0≤L<L1。L1为室外机20的内部空间的最大空间距离。
例如,如图3所示,室外风机22工作时形成的气流方向为图中的箭头方向(水平方向),室外风机22工作时形成的气流先吹向第二部分32,之后再吹向第一部分31。
例如,在室外换热器组件3包括三排换热管道的情况下,可以将最外面的一排换热管道作为第二部分32,将中间一排换热管道与最内部一排换热管道作为第一部分31。
通过上述设置,室外风机22工作时形成的气流先和第二部分32进行热交换,之后再和第一部分31进行热交换。
例如,第一部分31和第二部分32可以沿竖直方向设置。例如,第一部分31位于第二部分32在竖直方向上的一侧。例如,在垂直于该竖直方向的水平面内,第一部分31的投影位于第二部分32的投影内。例如,在垂直于该竖直方向的水平面内,第二部分32的投影位于第二部分31的投影内。例如,在垂直于该竖直方向的水平面内,第一部分31的投影与第二部分32的投影重合。
如图4和图5所示,在一些实施例中,第一部分31位于第二部分32的上方。这样一来,在对室外换热器组件3的除霜过程中,可以先对第一部分31进行除霜,再对第二部分32进行除霜,可以使得第一部分31的热量通过化霜水带到第二部分32熔化部分冰层,加快室外换热器组件3的除霜速度。
如图6和图7所示,在一些实施例中,第二部分32位于第一部分31的上方。这样一来,在对室外换热器组件3的除霜过程中,可以先对第二部分32进行除霜,再对第一部分31进行除霜,可以使得第二部分32的热量通过化霜水带到第一部分31熔化部分冰层,加快室外换热器组件3的除霜速度。
需要说明的是,此处的上下与空调系统100处于安装使用状态的上下的方向一致。
在一些示例中,如图3和图4所示,第一支路41的第一端和第二部分32的第一端连通,第一支路41的第二端和第一部分31的第二端连通。第一支路41上设置有第一节流阀51,且第一节流阀51与第一支路相连通。
第一节流阀51被配置为控制第一支路41的通断,以及对流经第一节流阀51的冷媒进行节流降压。也就是说,第一节流阀51的开度可调。第一节流阀51可被调节至全开状态(即,第一节流阀51的开度为100%)、全关状态(即,第一节流阀51的开度为0)和节流状态(即,第一节流阀51的开度介于0至100%之间)。在第一节流阀51处于全关状态的情况下,第一节流阀51两端的管路之间不导通。在第一节流阀51处于全开状态和节流状态的情况下,第一节流阀51两端的管路之间导通。且第一节流阀51在节流状态的情况下可以对流经第一节流阀51的冷媒进行节流降压。
例如,第一节流阀51可以为电子膨胀阀;或者,第一节流阀51也可以为为热力膨胀阀。
通过上述设置,可以通过第一支路41连通第二部分32的第一端和第一部分31的第二端,并可以通过第一节流阀51控制第二部分32的第一端和第一部分31的第二端之间的连通情况。
在一些示例中,如图3所示,在室外机20以免除霜模式运行的情况下,室内换热器101的第一端与压缩机21的排气口212连通,室内换热器101的第二端与第二部分32的第二端连通,第一部分31的第一端和压缩机21的吸气口211连通,以使压缩机21内的冷媒由排气口212依次进入室内换热器101、第二部分32,对第二部分32进行加热,并最终通过第一部分31、吸气口211返回压缩机21。室外风机22工作,以将第二部分32附近被加热的空气吹向第一部分。
通过上述设置,可以利用从室内换热器101流向第二部分32的冷媒中的余热对第二部分32进行加热,从而避免第二部分32结霜。被加热后的第二部分32可以加热周围空气,使周围空气的温度升高,在室外风机22工作后,可以将第二部分32周围的热空气吹向第一部分31,从而对第一部分31进行加热,以避免第一部分31结霜;同时,被加热后的第二部分32还可以通过管道之间的热传导以及热辐射的方式对第一部分31进行加热,以避免第一部分31结霜。
由此,空调系统100通过运行免除霜模式,可以避免室外换热器组件3结霜,且在第一部分31的温度升高后,可以提高第一部分31内冷媒的蒸发能力。这样,空调系统100的制热能力提高,还可以提高压缩机和空调系统100的可靠性。同时,室内机10可以不间断对室内制热,提高了室内用户的热舒适性,进而提高了用户的使用体验。
在一些实施例中,如图3至图5所示,室外机20还包括换向组件6。
换向组件6被配置为在调整空调系统100内冷媒的流向。
在一些实施例中,如图3至图5所示,换向组件6包括第一阀口61、第二阀口62、第三阀口63和第四阀口64。第一阀口61与排气口212连通;第二阀口62与室内换热器101的第一端连通;第三阀口63分别与第一部分31的第一端、第二部分32的第一端连通;第四阀口64与吸气口211连通。
如图3所示,第一阀口61可以与第二阀口62和第三阀口63中的其中一个换向导通,第四阀口64可以与第二阀口62和第三阀口63中的另一个换向导通。也就是说,当第一阀口61与第二阀口62导通时,第三阀口63与第四阀口64导通;当第一阀口61与第三阀口63导通时,第二阀口62与第四阀口64导通。
在一些实施例中,换向组件6可以为四通换向阀。四通换向阀可以在打开和关闭两种状态之间切换,当对四通换向阀上电时,四通换向阀打开,第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通;当对四通换向阀断电时,四通换向阀关闭,第一阀口61与第三阀口63导通,第二阀口62与第四阀口64导通。
在一些实施例中,当对四通换向阀断电时,第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通;当对四通换向阀上电时,第一阀口61与第三阀口63导通,第二阀口62与第四阀口64导通。
在一些示例中,如图3至图5所示,室外机20还包括第二支路42。第二支路42的第一端与第一部分31的第二端连通,第二支路42的第二端与室内换热器101的第二端连通,第二支路42上设置有第二节流阀52,且第二节流阀52与第二支路相连通。
第二节流阀52被配置为控制第二支路42的通断以及对流经第二节流阀52的冷媒进行节流降压。也就是说,第二节流阀52的开度可调。第二节流阀52可被调节至全开状态(即,第二节流阀52的开度为100%)、全关状态(即,第二节流阀52的开度为0)和节流状态(即,第二节流阀52的开度介于0至100%之间)。在第二节流阀52处于全关状态的情况喜爱,第二节流阀52两端的管路之间不导通。在第二节流阀52处于全开状态和节流状态的情况下,第二节流阀52两端的管路之间导通,且第二节流阀52在节流状态的情况下,可以对流经第二节流阀52的冷媒进行节流降压。
在一些示例中,室外机20还包括第三支路43。第三支路43的第一端与第二部分32的第二端连通,第三支路43的第二端与室内换热器101的第二端连通,第三支路43上设置有第三节流阀53,且第三节流阀53与第三支路43相连通。
第三节流阀53被配置为控制第三支路43的通断以及对流经第三节流阀53的冷媒进行节流降压。也就是说,第三节流阀53的开度可调。第三节流阀53可被调节至全开状态(即,第三节流阀53的开度为100%)、全关状态(即,第三节流阀53的开度为0)和节流状态(即,第三节流阀53的开度介于0至100%之间)。在第三节流阀53处于全关状态的情况下,第三节流阀53两端的管路之间不导通。 在第三节流阀53处于全开状态和节流状态的情况下,第三节流阀53两端的管路之间导通,且第三节流阀53在节流状态的情况下,可以对流经第三节流阀53的冷媒进行节流降压。
在一些实施例中,如图3至图5所示,第三阀口63与第二部分32的第一端相连通且连通管路上设置有第二通断阀54。
例如,第二通断阀54可以为两通阀。例如,第二通断阀54可以为电磁阀,也可以为节流阀,例如第二通断阀54可以为电子膨胀阀。例如,第二通断阀54可以为可逆两通阀。第二通断阀54被配置为在打开状态和关闭状态之间切换,以控制第三阀口63与第二部分32的第一端之间管路的通断。
例如,第二节流阀52和第三节流阀53可以均为电子膨胀阀;或者,第二节流阀52和第三节流阀53也可以均为热力膨胀阀。
本公开一些实施例提供的空调系统100的阀件及连接管路较少,结构简单,成本低。
在一些实施例中,如图3至图5所示,室内机10还包括室内风机102。
室内风机102被配置为加快室内换热器101的换热速度。
在一些实施例中,空调系统100具有制冷模式、制热模式、免除霜模式。下面对本实施例中空调系统的制冷模式、制热模式、免除霜模式的控制过程和冷媒的流向进行详细说明。
<制冷模式>
请参阅图8,当空调系统100运行制冷模式时,控制器40控制换向组件6的第一阀口61与第三阀口63导通,第二阀口62与第四阀口64导通。控制器40控制第一节流阀51调节至全关状态,第二节流阀52调节至节流状态,以控制第一部分31的出口的过冷度,第三节流阀53调节至节流状态,以控制第二部分32的出口的过冷度,第二通断阀54切换为打开状态,室外风机22工作。
在此情况下,从压缩机21的排气口212排出的高温高压的气态冷媒经过第一阀口61流入换向组件6,并且从第三阀口63流出换向组件6。从第三阀口63流出的冷媒流向第一部分31和第二部分32,并在第一部分31和第二部分32内充分换热后变成高压中温的液态冷媒。然后从第一部分31和第二部分32流出的冷媒流经第二节流阀52和第三节流阀53,并被第二节流阀52和第三节流阀53节流后,变为低温低压的两相冷媒。经过第二节流阀52和第三节流阀53节流降压后的两相冷媒流入室内换热器101,并在室内换热器101内,被蒸发为低温低压的气态冷媒以冷却室内环境,最后,低温低压的气态冷媒依次通过第二阀口62、第四阀口64流回压缩机21的吸气口211,至此完成空调系统100的制冷循环。
<制热模式>
请参阅图9,当空调系统100运行制热模式时,控制器40控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通。控制器40控制第一节流阀51调节至全关状态,第二节流阀52调节至节流状态、第三节流阀53调节至节流状态以控制压缩机21的吸气/排气过热度,第二通断阀54切换为打开状态,室外风机22工作。
在此情况下,从压缩机21的排气口212排出的高温高压的气态冷媒经过第一阀口61流入换向组件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101,从第二阀口62流出的冷媒在室内换热器101进行换热后,冷却为高压中温的液态冷媒以对室内制热。然后,高压中温的液态冷媒从室内换热器101流出后流向第二节流阀52和第三节流阀53,经过第二节流阀52和第三节流阀53节流后分别流入第一部分31和第二部分32,并在第一部分31和第二部分32内,被蒸发为低温低压的气态冷媒。最后,低温低压的气态冷媒从第一部分31和第二部分32流出,并依次通过第三阀口63、第四阀口64流回压缩机21的吸气口211,至此完成空调系统100的制热循环。
<免除霜模式>
请参阅图10,当空调系统100运行免除霜模式时,在室外机20中,冷媒对第二部分32进行加热,并在此情况下,第二部分32对第一部分31进行加热。控制器40控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通。控制器40控制第一节流阀51调节至节流状态以控制压缩机21的吸气/排气过热度,第二节流阀52调节至全关状态,第三节流阀53调节至全开状态,第二通断阀54切换为关闭状态,室外风机22工作。
可以理解的,在空调系统100包括多个室外机20的情况下,可以对其中一个室外机20进行上述操作,剩余室外机20仍维持原工作状态,也可以是对全部室外机20进行上述操作。
在此情况下,从压缩机21的排气口212排出的高温高压的气态冷媒经过第一阀口61流入换向组 件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101,在室内换热器101进行换热后冷却为高压中温的液态冷媒以对室内制热。然后,高压中温的液态冷媒从室内换热器101流向第三节流阀53,经过第三节流阀53后流入第二部分32,高压中温的液态冷媒的余热对第二部分32进行加热,从第二部分32流出的冷媒被第一节流阀51节流后流向第一部分31,并在第一部分31内被蒸发为低温低压的气态冷媒。最后,低温低压的气态冷媒从第一部分31流出,并依次通过第三阀口63、第四阀口64流回压缩机21的吸气口211。
在上述过程中,被加热后的第二部分32可以加热周围空气,使周围空气的温度升高,在室外风机22工作后,可以将第二部分32周围的热空气吹向第一部分31,从而对第一部分31进行加热,以避免第一部分31结霜;同时,被加热后的第二部分32还可以通过管道之间的热传导以及热辐射的方式对第一部分31进行加热,以避免第一部分31结霜。因此,空调系统100可以避免室外换热器组件3结霜,可以提高系统的制热能力,提高了压缩机和系统的可靠性。同时在上述过程中,室内机10可以不间断地对室内制热,提高了室内用户的热舒适性,提高了用户的使用体验。
在一些实施例中,如图11所示,空调系统100的室外机20还包括第四支路44,第四支路44的第一端与压缩机21的排气口212连通,第四支路44的第二端与第一部分31的第二端连通。第四支路44上设置有第一通断阀55,且第一通断阀55与第四支路44相连通。例如,在空调系统100以除霜模式运行的情况下,第四支路44被配置为使压缩机21内的冷媒由排气口212进入第一部分,以对第一部分31进行加热,并最终通过吸气口211返回压缩机21。
例如,第一通断阀55可以为两通阀。例如,第一通断阀55可以为电磁阀,也可以为节流阀,例如,第一通断阀55可以为电子膨胀阀。例如,第一通断阀55可以为可逆两通阀。第一通断阀55被配置为在打开状态和关闭状态之间切换,以控制第四支路44的通断。
通过上述设置,可以在通过第二部分32对第一部分31加热的基础上,通过压缩机21排出的冷媒直接对第一部分31进行加热,有利于提高第一部分31的升温速度,在第一部分31上结霜的情况下,可以提高除霜速度。
在一些实施例中,空调系统100还具有除霜模式。室外换热器组件结霜的情况下,空调系统100运行除霜模式的过程中,可以利用压缩机21排出冷媒的热量对室外换热器组件进行除霜。下面对本公开一些实施例提供的空调系统的制冷模式、制热模式、免除霜模式、除霜模式的控制过程和冷媒的流向进行详细说明。
<制冷模式>
请参阅图12,与图8所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括第一通断阀55。当空调系统100运行制冷模式时,控制器40控制第一通断阀55切换为关闭状态。
冷媒流向与图8所示一些实施例的空调系统100的制冷模式中的冷媒流向相同,此处不在赘述。
<制热模式>
请参阅图13,与图9所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括第一通断阀55。当空调系统100运行制热模式时,控制器40控制第一通断阀55切换为关闭状态。
冷媒流向与图9所示一些实施例的空调系统100的制热模式中的冷媒流向相同,此处不在赘述。
<免除霜模式>
请参阅图14,与图10所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括第一通断阀55。当空调系统100运行免除霜模式时,控制器40第一通断阀55切换为关闭状态。
冷媒流向与图10所示一些实施例的空调系统100的免除霜模式中的冷媒流向相同,此处不在赘述。
在一些示例中,空调系统100还可以运行除霜模式。
请参阅图15,当空调系统100运行除霜模式时,在室外机20中,从压缩机21流出的一部分冷媒可以流过第四支路44后直接对第一部分31进行加热。控制器40控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通。控制器40控制第一节流阀51调节至全关状态,第二节流阀52调节至全关状态,第三节流阀53调节至节流状态以控制压缩机21的吸气/排气过热度,第二通断阀54切换为打开状态,第一通断阀55切换为打开状态,室外风机22工作。
在此情况下,从压缩机21的排气口212排出的一部分高温高压的气态冷媒经过第一阀口61流入换向组件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101,且在室内换热器101进行换热后,冷却为高压中温的液态冷媒以对室内制热。然后,高压中温的液态冷媒从室内换热器101流向第三节流阀53,被第三节流阀53节流后流入第二部分32,并在第二部分32内被蒸发为低温低压的气态冷媒。最后,低温低压的气态冷媒从第二部分32流出,并依次通过第二通断阀54、第三阀口63、第四阀口64流回压缩机21的吸气口211。从压缩机21的排气口212排出的另一部分高温高压的气态冷媒经过第四支路44、第一通断阀55流入第一部分31。从第一部分31流出的冷媒依次通过第二通断阀54、第三阀口63、第四阀口64流回压缩机21的吸气口211。
通过上述设置,可以利用压缩机21排出冷媒的显热高温直接对第一部分31进行加热,这样,可以加快对第一部分31的加热速度,使第一部分31的温度迅速上升,在第一部分31上结霜较厚的情况下,可以加快对第一部分31除霜的速度。
在一些实施例中,如图4和图6所示,室外机20还包括第五支路45,第五支路45的第一端与排气口相连通,第五支路45的第二端与第二部分32的第二端相连通。第五支路45上串接有节流组件56。
在一些实施例中,节流组件56被配置为控制第五支路45的通断以及对流经第五支路45的冷媒进行节流降压。也就是说,节流组件56的开度可调。节流组件56可被调节至全开状态(即,节流组件56的开度为100%)、全关状态(即,节流组件56的开度为0)和节流状态(即,节流组件56的开度介于0至100%之间)。在节流组件56处于全关状态的情况下,第三节流阀53两端的管路之间不导通。在节流组件56处于全开状态和节流状态的情况下,节流组件56两端的管路之间导通,且节流组件56在节流状态的情况下,可以对流经节流组件56的冷媒进行节流降压。
请参阅图4至图7,在一些实施例中,节流组件56包括节流阀。例如,节流组件56可以包括电子膨胀阀,这样一来,可以提高空调系统100的运行速度和调控准确性。
空调系统100运行制冷模式或制热模式时,第二部分32的第二端为进液端,第五支路45的第二端与第二部分32的进液端连接,这样,可简化第五支路45与第二部分32之间的管路分布及连接结构,便于组装空调系统。
例如,第五支路45的第二端与第三节流阀53和第二部分32之间的管路相连通。这样一来,第五支路45中的冷媒可以避开第三节流阀53直接进入第二部分32,可以避免第三节流阀53影响第五支路45上的冷媒的状态。当第二部分32上有霜时,可以通过控制节流组件56,使从排气口212排出的高温高压的气态冷媒在被节流组件56节流降压变成液态冷媒后可以沿着第五支路45进入第二部分32,从而利用压缩机21排气的潜热对第二部分32进行除霜;当无需对第二部分32进行除霜时,可以通过控制节流组件56调节至全关状态,从而可以避免从排气口212排出的高温高压的气态冷媒流向第五支路45,影响空调系统100的工作,有利于提高空调系统100运行的可靠性。
在一些实施例中,节流组件56被配置为控制第五支路45的通断。例如,节流组件56包括串接的第三通断阀和减压器,这样一来,有利于降低节流组件56的制造难度和成本,且便于维护。
在一些实施例中,如图5和图7所示,第五支路45的第一端与排气口相连通,第一支路41的第一端与第二节流阀52和第一部分31的第二端之间的管路相连通。第五支路45的第二端与第二部分32的第一端和第二通断阀54之间的管路相连通,第一支路41的第二端与第二部分32的第二端相连通。第五支路45的第二端与第二部分32的进气端连接,第五支路45的压损较小,可以选型较小规格的节流组件56,降低了空调系统100的成本。
例如,第一支路41的第二端与第二部分32的第二端和第三节流阀53之间的管路相连通,原理和效果与图4和图6所示的实施例相似,此处不再赘述。
在一些实施例中,空调系统100具有制冷模式、制热模式和除霜模式。
<制冷模式>
请参阅图16和图17,与图12所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括节流组件56。当空调系统100运行制冷模式时,控制器40控制节流组件56调节至全关状态。
冷媒流向与图12所示一些实施例的空调系统100的制冷模式中的冷媒流向相同,此处不在赘述。
<制热模式>
请参阅图18和图19,与图13所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括节流组件56。当空调系统100运行制热模式时,控制器40控制第一通断阀55切换为关闭状态。
冷媒流向与图13所示一些实施例的空调系统100的制热模式中的冷媒流向相同,此处不在赘述。
<除霜模式>
在一些实施例中,请参阅图20和图21,与图15所示一些实施例的空调系统100不同的是,本公开一些实施例提供的空调系统100还包括节流组件56。当对第一部分31进行除霜时,控制器40控制节流组件56调节至全关状态。
冷媒流向与图15所示一些实施例的空调系统100的除霜模式中的冷媒流向相同,此处不在赘述。
在一些实施例中,请参阅图22和图23,当对第二部分32进行除霜时,控制器40控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通。控制器40控制第二通断阀54切换为关闭状态,第二节流阀52调节至节流状态,第三节流阀53调节至关闭状态,节流组件56调节至节流状态、第一通断阀55切换为关闭状态、第一节流阀51调节至节流状态。
在此情况下,从压缩机21的排气口212排出的高温高压的气态冷媒分别流向换向组件6和第五支路45。流向换向组件6的冷媒经过第一阀口61流入换向组件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101。流向室内换热器101的高温高压的气态冷媒在室内换热器101内换热后被冷凝成高温高压的过冷液态冷媒。然后,从室内换热器101流出的高温高压的过冷液态冷媒流向第二节流阀52,在第二节流阀52中被节流后变成低温低压的两相态冷媒。接着,低温低压的两相态冷媒流向第一部分31,在第一部分31蒸发后变成低温低压的气态冷媒。
流向第五支路45的高温高压的气态冷媒经过节流组件56节流后变成高温中压的气态冷媒,然后流入第二部分422。高温中压的气态冷媒在第二部分422中被冷凝后,变成中温中压的液态冷媒后流入第一支路41,在第一节流阀51中被节流后变成低温低压的液态冷媒并与来自室内换热器101的低温低压冷媒汇合后,流入第一部分421。在第一部分31中,汇合的两路冷媒被蒸发后变成低温低压的气态冷媒,并依次通过第三阀口63、第四阀口64流回压缩机21的吸气口211,至此完成对第二部分32的除霜冷媒循环。
可以理解的是,本公开一些实施例提供的空调系统100,包括由一个室外机20的排气口212、第四支路44、第一部分31和吸气口211依次连接形成的第一除霜流路,由排气口212、第五支路45、第二部分32、第一支路41、第一部分31和吸气口211依次连接形成的第二除霜流路,以及由排气口212、第五支路45、第二部分32、吸气301口依次连接形成的第三除霜流路。
因此,在一些实施例中,空调系统100可以通过第一除霜流路,利用来自压缩机21的一部分高温高压的气态冷媒的显热,对第一部分31进行除霜。在此情况下,第一部分31作为冷凝器,第二部分32可以作为蒸发器,室内换热器101可以利用来自压缩机21的另一部分高温高压的气态冷媒对室内空气进行加热。
在一些实施例中,空调系统100可以通过第三除霜流路,利用来自压缩机21的一部分高温高压的气态冷媒的显热,对第二部分32进行除霜。在此情况下,第二部分32作为冷凝器,第一部分31可以作为蒸发器,室内换热器101可以利用来自压缩机21的另一部分高温高压的气态冷媒对室内空气进行加热。
在一些实施例中,空调系统100可以通过控制第二除霜流路上的节流组件56和第一节流阀51的开度,并利用来自压缩机21的高温高压的气态冷媒的潜热,对第二部分32进行除霜,冷媒释放的热量多,除霜速度快。在此情况下,第二部分32作为冷凝器,第一部分31可以作为蒸发器,室内换热器101可以利用来自压缩机21的另一部分高温高压的气态冷媒对室内空气进行加热,而自第二部分32流入第一部分31的冷媒可以提高自室内换热器101流入第一部分31内冷媒的温度,可以降低第一部分31的结霜速度,也避免了能量的浪费。
综上所述,本公开一些实施例提供的空调系统100可以对第一部分31和第二部分32轮换除霜,还可以对第一部分31采用热气旁通显热除霜、对第二部分32采用中压潜热除霜,在保证空调系统100对室内持续制热且除霜速度快的同时,既利用了热气旁通除霜的结构简单、效果好、成本低的优势,又避免了整个室外换热器组件3全部通过热气旁通除霜造成的能力浪费严重。
热气旁通显热除霜为:压缩机21排出的高温高压的气态冷媒通过旁通流路进入室外换热器组件, 从而利用冷媒的显热对室外换热器组件进行除霜。
中压潜热除霜为:压缩机21排出的高温高压的气态冷媒经过换热后,被冷却为高压中温的液态冷媒,然后进入室外换热器组件,从而利用冷媒的潜热对室外换热器组件进行除霜。
例如,请参阅图22和图23,旁通流路可以为第二除霜流路的第五支路45,来自压缩机21的一部分高温高压的气态冷媒,通过第五支路45进入第二部分32,从而利用冷媒的显热对第二部分32进行热气旁通显热除霜。冷媒经过第二部分32换热后,被冷却为高压中温的液态冷媒,然后通过第一支路41进入第一部分31,从而利用冷媒的潜热对第一部分31进行中压潜热除霜。
在一些实施例中,如图3至图7所示,空调系统100还包括气液分离器8,气液分离器8具有液体进口81和气体出口82,液体进口81与第四阀口64连通,气体出口82与吸气口211连通。
例如,气液分离器8可以对进入到压缩机21的冷媒进行气液分离,避免对压缩机21产生液击问题,从而有利于提高压缩机21运行的可靠性和稳定性。
请参阅图4至图7,在一些实施例中,室外机20还包括过冷器9,第二节流阀52和第三节流阀53通过过冷器9与室内换热器101的第二端相连。这样一来,可以减少空调系统100在节流过程中产生的闪发气体,有利于提高空调系统100的制冷量,并且也可以提高压缩机21运行的稳定性,从而有利于提高空调系统100的稳定性和可靠性。
请参阅图4至图7,在一些实施例中,空调系统100还包括第一截止阀103和第二截止阀104。第一截止阀103与室内换热器101的第一端连通,第二截止阀104与室内换热器101的第二端连通。可以理解的是,当室内换热器101出现故障,需要进行维修或更换时,可以将第一截止阀103和第二截止阀104关闭,以将室内换热器101内的冷媒被封存在室内换热器101中,从而便于对室内换热器101进行维修。
例如,空调系统100可以为多联机系统。如图1所示,空调系统100包括多个室内机10。每个室内机10内设置有室内换热器101。多个室内机10并联设置。多个室内机10的室内换热器101的第一端均与第一截止阀103连通。多个室内机10的室内换热器101的第二端均与第二截止阀104连通。
在一些实施例中,请参阅图4和图5,室外风机22可以设置于第一部分31远离第二部分32的一侧。这样一来,在对第二部分32进行除霜时,室外风机22可以运行以增加空调系统100的供热量,有利于提高空调系统100的制热性能。或者,请参阅图6和图7,室外风机22也可以设置于第二部分32远离第一部分31的一侧,在对第一部分31进行除霜时,室外风机22可以运行以增加空调系统100的供热量,有利于提高空调系统100的制热性能。
在一些实施例中,如图3至图7、图11所示,空调系统100包括检测组件,检测组件被配置为检测空调系统100的多个参数信息,控制器40与检测组件电连接。检测组件包括:检测吸气压力Ps的第一压力传感器71,检测排气压力Pd的第二压力传感器72,检测排气温度Td的第六温度传感器73,检测第一部分31的减压器温度Te1的第一温度传感器74,检测第二部分32的减压器温度Te2的第二温度传感器75,检测第一部分31的气管温度Tg1的第四温度传感76,检测第二部分32的气管温度Tg2的第五温度传感器77,检测室外环境温度Ta的第三温度传感器78。
可以理解的是,吸气压力Ps为压缩机的吸气口的吸气压力,排气压力Pd为压缩机的排气口的排气压力,排气温度Td为压缩机的排气口的温度,第一部分31气管温度为第一部分31的第一端的温度,第一部分31减压器温度为第一部分31的第二端的温度,第二部分32气管温度为第二部分的第一端的温度,第二部分32减压器温度为第二部分32的第二端的温度。
在一些实施例中,控制器40被配置为:若空调系统达到免除霜模式开始条件,控制第一支路导通,以使室外机的压缩机的冷媒对第二部分进行加热,并使第二部分对第一部分进行加热;若空调系统满足免除霜模式结束条件,空调系统运行用户设定的工作模式。
本公开的一些实施例还提供了一种除霜控制方法,如图24所示,该除霜控制方法包括步骤S100至步骤S400。
在步骤S100,检测空调系统是否满足免除霜模式开始条件。
在步骤S200,若空调系统满足免除霜模式开始条件,控制空调系统运行免除霜模式,以对室外机中的第二部分进行加热,并使第二部分对第一部分进行加热。
在步骤S300,检测空调系统是否满足免除霜模式结束条件。
S400、若空调系统满足免除霜模式结束条件,控制空调系统运行预设工作模式。
例如,预设工作模式为用户设定的制冷模式、制热模式等工作模式。
可以理解的是,在检测到空调系统100满足免除霜模式开始条件的情况下,空调系统100运行免除霜模式,以对室外机20中的第二部分32进行加热,并使第二部分32对第一部分31进行加热,这样可以提高第一部分31和第二部分32的温度,避免室外换热器组件3结霜。并且,在上述过程中,空调系统100可以持续对室内进行制热,并在不间断地对室内制热的基础上,有效地避免室外换热器组件3结霜,有利于提高压缩机和系统的可靠性,提高用户的使用体验。
需要说明的是,在本公开一些实施例中提供的除霜控制方法可以根据空调系统100的结构不同进行调整。
在一些实施例中,控制器40还被配置为:若空调系统满足免除霜模式开始条件,调节压缩机的第一吸气过热度Tssh1大于或等于第一阈值d,并调节压缩机的排气过热度Tdsh大于或等于第二阈值e。
例如,0℃≤d<e,Tssh1=Tg1-Tcps,Tdsh=Td-Tcpd,Tg1为第一部分的第一端的温度,Td为压缩机的排气口的排气温度,Tcps为压缩机的吸气压力对应的饱和温度,Tcpd为压缩机的排气压力对应的饱和温度。
例如,d的取值范围为:0℃≤d<3℃、3℃≤d<6℃或者6℃≤d≤10℃;和/或,e的取值范围为:20℃≤e<28℃、28℃≤e<36℃或者36℃≤e≤40℃。
在一些实施例中,免除霜模式开始条件包括:室外环境的温度的最小值Tamin小于或等于第三阈值a,第一部分的第二端的温度的最小值Te1min或者第二部分的第二端的温度的最小值Te2min小于或者等于第四阈值b,且空调系统运行在制热模式下的累积运行时间达到第五阈值c;例如,-7℃<a<7℃,b≤0℃,10min≤c。
例如,在免除霜模式开始条件中,-7℃<a<7℃,b=0℃,10min≤c<20min。
例如,在免除霜模式开始条件中,-7℃<a<7℃,-5℃≤b<0℃,20min≤c<30min。
例如,在免除霜模式开始条件中,-7℃<a<7℃,b<-5℃,c≥30min。
在一些实施例中,控制器40还被配置为:若空调系统满足免除霜模式结束条件,控制第四支路导通,以使压缩机内的冷媒由排气口通过第四支路进入第一部分,并对第一部分进行加热。
在一些实施例中,控制器40还被配置为:若空调系统满足免除霜模式结束条件,控制器40控制第四支路导通之前,调节压缩机的第二吸气过热度Tssh2,使Tssh2≥d;以及,调节压缩机的排气过热度Tdsh,使Tdsh≥e;例如,Tssh2=Tg2-Tcps,Tg2为第二部分的第一端的温度。
在一些实施例中,控制器40还被配置为:若空调系统满足免除霜模式开始条件,将压缩机的排气压力的最小值Pdmin分别与第一阈值压力h、第二阈值压力I进行比较,并得到比较结果;若Pdmin≥h,则控制室内风机的风档为第一风档,例如,第一风档为用户设定的风档;若Pdmin<I,则控制室内风机停止运行;以及,若I≤Pdmin<h,则控制室内风机的风档为第二预设风档;例如,I<h,室内风机在第二预设风档时的转速,小于室内风机最高转速。
例如,1.5MPa≤h≤2MPa,1MPa≤I≤1.5MPa,室内风机在第二预设风档时的转速,小于室内风机最高转速的二分之一。例如,h为1.5MPa的情况下,I为1MPa。例如,h为1.8MPa的情况下,I为1MPa。例如,h为1.8MPa的情况下,I为1.2MPa。例如,h为1.8MPa的情况下,I为1.5MPa。例如,h为2MPa的情况下,I为1.2MPa。例如,h为2MPa的情况下,I为1.5MPa。
在一些实施例中,控制器40还被配置为:若空调系统满足免除霜模式开始条件,将室内机出风温度的最小值Tomin分别与第一阈值温度M1、第二阈值温度N1进行比较,并得到比较结果;将室内换热器的液管温度的最小值Tlmin分别与第三阈值温度M2、第四阈值温度N2进行比较,并得到比较结果;若Tomin≥M1或Tlmin≥M2,则控制室内风机的风档为用户设定的风档;若Tomin<N1且Tlmin<N2,则控制室内风机停止运行;以及,若N1≤Tomin<M1或N2≤Tlmin<M2,则控制室内风机的风档为第二预设风档;例如,N1<M1,N2<M2,室内风机在第二预设风档时的转速,小于室内风机最高转速。
例如,5℃≤M1≤35℃,15℃≤N1≤25℃,20℃≤M2≤40℃,10℃≤N2≤25℃;室内风机在第二预设风档时的转速,小于室内风机最高转速的二分之一。
下面结合图3和图25对上述除霜控制方法进行补充说明。在一些实施例中,所述除霜控制方法还包括步骤S1至步骤S5。
在步骤S1,空调系统运行时采集空调系统运行过程中的多个温度值和多个压力值。
例如,在步骤S2中,采集的多个温度值包括:Ta、Te1、Te2、Tg1和Tg2,采集的多个压力值包括:Ps、Pd、Td。
需要说明的是,在空调系统100包括多个室外机20的情况下,上述检测到的各种参数可以有多个,在实际使用中,对上述检测到的参数取值时取上述参数的最大值或最小值。
例如,如图3和图11所示,在空调系统100包括两个室外机20的情况下,两个室外机20均可以测得一个Tg1,在对Tg1取值时,可以取其中的最大值Tg1max或最小值Tg1min。
在步骤S2,判断空调系统是否需要制热。
若判断结果为是,则转为步骤S3。若判断结果为否,则转为步骤S4。
在步骤S3,控制空调系统运行制热模式。
在步骤S4,控制空调系统运行制冷模式。
在步骤S3后转向步骤S5。
在步骤S5,判断空调系统是否满足免除霜模式开始条件。
在一些实施例中,检测空调系统100是否满足免除霜模式开始条件包括:检测室外环境的温度的最小值Tamin,检测第一部分31的减压器温度的最小值Te1min,检测第二部分32的减压器温度的最小值Te2min。免除霜模式开始条件包括:Tamin≤a,Te1min≤b1或Te2min≤b1,且空调系统100运行在制热模式下的累积运行时间达到c1分钟。例如,-7℃<a<7℃,b1为0℃,10min≤c1<20min。
例如,a的值可以为-6℃、-3℃、-1℃、0℃、1℃、3℃或6℃等。
例如,c1的值可以为10min、12min、13min、14min、16min或19min等。
通过上述设置,可以使空调系统100根据上述参数判断是否满足免除霜模式开始条件,有利于空调系统100及时地调整为免除霜模式,避免室外换热器组件3结霜,从而避免影响空调系统100对室内制热,有利于提高压缩机和系统的可靠性,提高用户的使用体验。并且,上述Te1min和Te2min的目标值b1定的偏高,制热累积时间目标值c1定的偏低,可以使空调系统100更容易进入免除霜控制,更能避免维持室外换热器组件3结霜。
在一些实施例中,免除霜模式开始条件为:Tamin≤a,Te1min≤b2或Te2min≤b2,且所述空调系统运行在制热模式下的时间累积达到c2分钟。例如,-5℃≤b2<0℃,20min≤c2<30min。
例如,b2的值可以为-4℃、-3℃、-2℃、-1℃或-0.5℃等。
例如,c2的值可以为20min、22min、23min、24min、27min或29min等。
通过上述设置,可以使空调系统100根据上述参数判断是否满足免除霜模式开始条件,有利于空调系统100及时地调整为免除霜模式,避免室外换热器组件3结霜,从而避免影响空调系统100对室内制热,有利于提高压缩机和系统的可靠性,提高用户的使用体验。并且,上述Te1min和Te2min目标值b2定的较高,制热累积时间目标值c1定的较高,可以避免空调系统100频繁进入免除霜控制,可以延长空调系统100对室内持续制热的周期,还可以在一定程度上提高空调系统100的制热能力。
在一些实施例中,在步骤S5中,若判断空调系统未满足免除霜模式开始条件,则返回步骤S3。若判断空调系统100满足免除霜模式开始条件,则转向步骤S6。
S6、控制空调系统运行免除霜模式。
在一些实施例中,上述控制空调系统100运行在免除霜模式包括:在室外机20中,控制第一阀口61与第二阀口62连通,第三阀口63和第四阀口64连通。调节第二节流阀52至全关状态,调节第三节流阀53至全开状态,控制第二通断阀54切换为关闭状态,调节第一节流阀51至节流,并控制室外风机22工作。调节压缩机21的第一吸气过热度Tssh1,使Tssh1≥d;调节压缩机21的排气过热度Tdsh,使Tdsh≥e。例如,0℃≤d≤10℃,20℃≤e≤40℃,Tssh1=Tg1-Tcps,Tdsh=Td-Tcpd,Tg1为第一部分31的气管温度,Td为压缩机21的排气口212的排气温度,Tcps为压缩机21的吸气压力Ps对应的饱和温度,Tcpd为压缩机21的排气压力Pd对应的饱和温度。
需要说明的是,上述在室外机20中表示,在空调系统100包括多个室外机20的情况下,可以先对其中一个室外机20中的室外换热器组件3进行加热,以使该室外机20中的室外换热器组件3免结霜;也可以同时对多个室外机20中的室外换热器组件3进行加热,以使该多个室外机20中的室外换热器组件3免结霜,上述对室外机20中的室外换热器组件3进行加热可以根据实际情况进行选择。
以空调系统100包括室外机20A和室外机20B为例,在步骤S5中判断空调系统100是否满足免除霜模式开始条件时,室外机20A中的相关参数满足免除霜模式开始条件,而室外机20B中的相关参 数未满足免除霜模式开始条件,在此情况下,控制空调系统100运行在免除霜模式,可以使室外机20A中的冷媒对室外换热器组件3进行加热,而室外机20B中的冷媒仍按原制热模式中的冷媒流向流动,这样可以更有针对性地对室外换热器组件3进行加热,避免冷媒中的热量浪费。
或者,在步骤S5中判断空调系统100是否满足免除霜模式开始条件时,室外机20A中的相关参数满足免除霜模式开始条件,而室外机20B中的相关参数也满足免除霜模式开始条件,在此情况下,控制空调系统100运行免除霜模式,可以使室外机20A中的冷媒和室外机20B中的冷媒同时对室外换热器组件3进行加热。
例如,d的值可以为0℃、2℃、4℃、6℃、8℃或10℃等。
例如,e的值可以为20℃、25℃、30℃、34℃、38℃或40℃等。
通过上述设置,可以使从压缩机21的排气口212排出的高温高压的气态冷媒经过第一阀口61流入换向组件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101,在室内换热器101进行换热后冷却为高压中温的液态冷媒以对室内制热,然后从室内换热器101流出后流向第三节流阀53,经过第三节流阀53后流入第二部分32,利用冷媒的余热对第二部分32进行加热,之后通过第一节流阀51节流后流向第一部分31,并在第一部分31内蒸发为低温低压的气态冷媒。最后从第一部分31流出的冷媒依次通过第三阀口63、第四阀口64流回压缩机21的吸气口211。
并且在上述过程中,被加热后的第二部分32可以加热周围空气,使周围空气的温度升高,在室外风机22工作后,可以将第二部分32周围的热空气吹向第一部分31,从而对第一部分31进行加热,以避免第一部分31结霜;同时,被加热后的第二部分32还可以通过管道之间的热传导以及热辐射的方式对第一部分31进行加热,以避免第一部分31结霜。因此,本公开一些实施例提供的空调系统100可以避免室外换热器组件3结霜,可以提高空调系统100的制热能力,在一定程度提高了压缩机和系统的可靠性。同时在上述过程中,室内机10可以不间断对室内制热,提高了室内用户的热舒适性,提高了用户的使用体验。
在步骤S6中,空调系统可以持续对第一部分31和第二部分32进行加热,从而提高室外换热器组件3的温度,且使外换热器组件3的温度高于霜形成的温度,进而可以避免室外换热器组件3的第一部分31和第二部分32结霜。
在步骤S7,判断空调系统是否满足免除霜模式结束条件。
例如,上述免除霜模式结束条件包括:Tg1中的最小值Tg1min≥f且持续时间g秒。例如,0℃≤f≤10℃,5秒≤g≤30秒。
例如,f的值可以为0℃、2℃、4℃、6℃、8℃或10℃等。
例如,g的值可以为5秒、10秒、15秒、20秒、25秒或30秒等。
通过上述设置,室外换热器组件3的温度比较高,而且保存了一定热量,此时即使不再对室外换热器组件3继续加热,室外换热器组件3也难以结霜。
在步骤S8,控制空调系统运行预设工作模式。
至此,完成上述一种实施例中提供的空调系统100的控制。
但是,在部分情况下,空调系统100的第一部分31可能结霜较多,在空调系统100运行在免除霜模式后,第一部分31可能还残存有部分霜。
因此,在一些实施例中,如图26所示,在上述检测空调系统100达到免除霜模式结束条件之后,使空调系统100运行在用户设定的工作模式之前,上述除霜控制方法还包括步骤S110至步骤S130。
在步骤S110,控制空调系统100运行在除霜模式,以对室外机20中的第一部分31进行加热。
在步骤S120,检测第一部分31是否除霜完成。
在步骤S130,若完成,控制空调系统100退出除霜模式。
通过上述设置,可以使空调系统100单独对第一部分31进行加热,从而使第一部分继续升温,有利于除去第一部分31上的霜。
在一些实施例中,如图11和图27所示,空调系统100的除霜控制方法包括步骤S1A至步骤S11A。
在步骤S1A,空调系统运行时采集空调系统运行过程中的多个温度值和多个压力值。
例如,在步骤S210中,采集的多个温度值包括Ta、Te1、Te2、Tg1和Tg2,采集的多个压力值包括Ps、Pd和Td。
需要说明的是,在空调系统100包括多个室外机20的情况下,上述检测到的各种参数可以有多个,在实际使用中,对上述检测到的参数取值时取上述参数的最大值或最小值。
例如,如图3和图11所示,在空调系统100包括两个室外机20的情况下,两个室外机20均可以测得一个Tg1,在对Tg1取值时,可以取其中的最大值Tg1max或最小值Tg1min。
在步骤S2A、判断空调系统是否需要制热。
若判断结果为是,则转为S3A。若判断结果为否,则转为S4A。
在步骤S3A,控制空调系统运行制热模式。
在步骤S4A,控制空调系统运行制冷模式。
在步骤S3A后转向步骤S5A。
在步骤S5A,判断空调系统是否满足免除霜模式开始条件。
在一些实施例中,检测空调系统100是否满足免除霜模式开始条件包括:Tamin≤a,Te1min≤b3或Te2min≤b3,且空调系统100运行在制热模式下的累积运行时间达到c3分钟。例如,-7℃<a<7℃,b3<-5℃,c3≥30min。
例如,a的值可以为-6℃、-3℃、-1℃、0℃、1℃、3℃或6℃等。
例如,b3的值可以为-6℃、-7℃、-8℃、-9℃、-10℃、-13℃或-16℃等。
例如,c3的值可以为30min、32min、33min、34min、36min或39min等。
通过上述设置,可以使空调系统100根据上述参数判断是否满足免除霜模式开始条件,有利于空调系统100及时地调整为免除霜模式,避免室外换热器组件3结霜,从而避免影响空调系统100对室内制热,有利于提高压缩机和系统的可靠性,提高用户的使用体验。并且,上述Te1min和Te2min的目标值b1定的偏低,制热累积时间目标值c3定的偏高,可以进一步避免空调系统100频繁进入免除霜控制,可以进一步延长空调系统100对室内持续制热的周期,还可以在一定程度上提高空调系统100的制热能力。
在在步骤S5A中若判断空调系统100未满足免除霜模式开始条件,则返回步骤S3A。若判断空调系统100未满足免除霜模式开始条件,则转向步骤S6A。
在步骤S6A,控制空调系统运行免除霜模式。
控制空调系统100运行在免除霜模式的方式与上一实施例相同,此处不再赘述。
在步骤S6A中,空调系统可以持续对第一部分31和第二部分32进行加热,从而提高室外换热器组件3的温度,且使室外换热器组件3的温度高于霜形成的温度,进而可以避免室外换热器组件3的第一部分31和第二部分32结霜。
在步骤S7A,判断空调系统是否满足免除霜模式结束条件。若空调系统未满足免除霜模式结束条件,则返回步骤S6A;若空调系统满足除霜模式结束条件,转向步骤S8A。
例如,上述免除霜模式结束条件包括:Tg2中的最小值Tg2min≥f且持续时间g秒。例如,0℃≤f≤10℃。
例如,f的值可以为0℃、2℃、4℃、6℃、8℃或10℃等。
例如,g的值可以为5秒、10秒、15秒、20秒、25秒或30秒等。
通过上述设置,可以使第二部分32的温度比较高,而且保存了一定热量,此时即使不再对第二部分32继续加热,第二部分32也难以结霜。
在步骤S8A,控制空调系统100运行除霜模式。
在一些实施例中,在步骤S8A中,上述控制空调系统100运行在除霜模式包括:在室外机20中,控制第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通。调节第一节流阀51至全关状态,调节第二节流阀52至全关状态,调节第三节流阀53至节流状态以控制压缩机21的吸气/排气过热度,控制第二通断阀54切换为打开状态,控制第一通断阀55切换为打开状态,并控制室外风机22工作。调节压缩机21的第二吸气过热度Tssh2,使Tssh2≥d;调节压缩机21的排气过热度Tdsh,使Tdsh≥e。例如,Tssh2=Tg2-Tcps,Tg2为第二部分32的气管温度。
通过上述设置,可以使从压缩机21的排气口212排出的一部分高温高压的气态冷媒经过第一阀口61流入换向组件6,并且从第二阀口62流出换向组件6。从第二阀口62流出的冷媒流向室内换热器101,在室内换热器101进行换热后冷却为高压中温的液态冷媒以对室内制热。然后,高压中温的液态冷媒从室内换热器101流向第三节流阀53被节流后流入第二部分32,并在第二部分32内被蒸发为低 温低压的气态冷媒。最后,低温低压的气态冷媒从第二部分32流出,并依次通过第二通断阀54、第三阀口63和第四阀口64流回压缩机21的吸气口211。从压缩机21的排气口212排出的另一部分高温高压的气态冷媒经过第四支路44、第一通断阀55流入第一部分31,从第一部分31流出的冷媒依次通过第二通断阀54、第三阀口63和第四阀口64流回压缩机21的吸气口211。
由此,可以利用压缩机21排出冷媒的显热高温直接对第一部分31进行加热,这样,可以加快对第一部分31的加热速度,进而提高第一部分31的温度上升速度,在第一部分31上结霜较厚的情况下,可以提高对第一部分31除霜的速度。
在步骤S8中,空调系统以持续对第一部分31进行加热。
在步骤S9,判断空调系统是否满足除霜模式结束条件。若空调系统未满足除霜模式结束条件,则返回步骤S8;若空调系统满足除霜模式结束条件,转向步骤S10。
例如,上述除霜模式结束条件包括:Tg1中的最小值Tg1min≥f且持续时间g秒。例如,0℃≤f≤10℃,5秒≤g≤30秒。
例如,f的值可以为0℃、2℃、4℃、6℃、8℃或10℃等。
例如,g的值可以为5秒、10秒、15秒、20秒、25秒或30秒等。
通过上述设置,第一部分31的温度比较高,而且保存了一定热量,此时即使不再对第一部分31继续加热,第一部分31也难以结霜。
在步骤S10,控制空调系统运行预设工作模式。
在一些实施例中,如图28所示,控制空调系统100运行在免除霜模式的方法还包括步骤S210A至步骤S230A。
S210A、检测压缩机21的排气口212的排气压力Pd的最小值Pdmin。
S220A、将排气压力的最小值Pdmin分别与第一阈值压力h和第二阈值压力I进行比较,并得到比较结果。
S230A、若Pdmin≥h,则控制室内风机102的风档为第一预设风档;若Pdmin<I,则控制室内风机102停止运行;若I≤Pdmin<h,则控制室内风机102的风档为第二预设风档;
例如,1.5MPa≤h≤2MPa,1MPa≤I≤1.5MPa,且I<h,室内风机102在上述第二预设风档时的转速,小于室内风机102最高转速的二分之一。
例如,h的值可以为1.5MPa、1.6MPa、1.8MPa、1.9MPa或2MPa等。
例如,I的值可以为1MPa、1.1MPa、1.2MPa、1.3MPa或1.5MPa等。
例如,室内风机102的风档具有低档、中档和高档。
室内风机102的在高档时的转速即为室内风机102的最高转速。
例如,室内风机102在高档时的转速为3000r/min,则室内风机102在上述第二预设风档时的转速需小于1500r/min。
通过上述设置,可以根据压缩机21的排气口212的排气压力Pd判断室外换热器组件3的结霜风险,并室外换热器组件3的结霜风险灵活调整室内风机102的风档,从而可以使室内风机102的风档与空调系统的制热性能相匹配,这样,可以在避免室外换热器组件3结霜的基础上最大化利用空调系统的制热能力对室内制热。
在一些实施例中,如图29所示,步骤S210A至步骤S230A包括步骤S71A至步骤S76A。
在步骤S71A,检测压缩机的排气口的排气压力的最小值Pdmin。
在步骤S72A,判断Pdmin≥h是否成立。
若是,则转为步骤S73;若否,也即此时I≤Pdmin<h,则转为步骤S74。
在步骤S73A,控制室内风机102的风档为第一预设风档。
在此情况下,压缩机21的排气口212的排气压力Pd较大,空调系统100的制热性能较好,可以降低室外换热器组件3结霜的风险,此时即使用户将室内风机102的风档调整为高档,使冷媒中的大部分热量被配置为对室内升温,冷媒也会有足够的热量进入室外换热器组件3被配置为提高室外换热器组件3的温度,可以避免室外换热器组件3结霜。
在步骤S74A,判断Pdmin≥I是否成立。
在这种情况下,压缩机21的排气口212的排气压力Pd较小,需要进一步对压缩机21的排气口212的排气压力Pd进行检测,以根据最终的检测结果调整室内风机102的转速。
若是,则转为步骤S75A;若否,则转为步骤S76A。
在步骤S75A,控制室内风机102的风档调整为第二预设风档。
在此情况下,控制室内风机102的风档为第二预设风档,使冷媒中的一小部分热量被配置为对室内升温,从而使冷媒会有足够的热量进入室外换热器组件3被配置为提高室外换热器组件3的温度,从而避免室外换热器组件3结霜。
在步骤S76A,控制室内风机102停止运行。
在此情况下,压缩机21的排气口212的排气压力Pd小,空调系统100的制热性能差,室外换热器组件3结霜的风险高,此时控制室内风机102停止运行,可以使冷媒中的极少部分热量被配置为对室内升温,从而使冷媒中的大部分热量进入室外换热器组件3,且被配置为提高室外换热器组件3的温度,从而避免室外换热器组件3结霜。
在一些实施例中,如图30所示,控制空调系统100运行在免除霜模式的方法还包括步骤S210B至步骤S230B。
在步骤S210B,检测室内机10出风温度的最小值Tomin,检测室内换热器101液管温度的最小值Tlmin。
在步骤S220B,将室内机10出风温度的最小值Tomin分别与第一阈值温度M1和第二阈值温度N1进行比较,并得到比较结果;将室内换热器101液管温度的最小值Tlmin分别与第三阈值温度M2和第四阈值温度N2进行比较,并得到比较结果。
在步骤S230B,若Tomin≥M1或Tlmin≥M2,则控制室内风机102的风档为第一预设风档;若Tomin<N1或Tlmin<N2,则控制室内风机102停止运行;若N1≤Tomin<M1且N2≤Tlmin<M2,则控制室内风机102的风档为第二预设风档。第一预设风档和第二预设风档均可以为用户设定的风档。
例如,25℃≤M1≤35℃,15℃≤N1≤25℃,且N1<M1,20℃≤M2≤40℃,10℃≤N2≤25℃,且N2<M2。
例如,M1的值可以为25℃、28℃、30℃、32℃、34℃或35℃等。
例如,N1的值可以为15℃、17℃、19℃、21℃、23℃或25℃等。
例如,M2的值可以为20℃、25℃、30℃、34℃、38℃或40℃等。
例如,N2的值可以为10℃、14℃、18℃、20℃、22℃或25℃等。
通过上述设置,可以根据室内机10出风温度、室内换热器101液管温度判断室外换热器组件3的结霜风险,并根据室外换热器组件3的结霜风险灵活调整室内风机102的风档,从而可以使室内风机102的风档与空调系统100的制热性能相匹配。这样,可以在避免室外换热器组件3结霜的基础上最大化利用空调系统100的制热能力对室内制热。
在一些实施例中,如图31所示,步骤S210B至步骤S230B包括步骤S71B至步骤S76B。
在步骤S71B,检测室内机10出风温度的最小值Tomin,检测室内换热器101液管温度的最小值Tlmin。
在步骤S72B,判断Tomin≥M1或Tlmin≥M2是否成立。
若是,则转为步骤S73B;若否,则转为步骤S74B。
在步骤S73B,控制室内风机102的风档为第一预设风档。
在此情况下,室内机10出风温度较高,室内换热器101液管温度较高,空调系统100的制热性能较好,可以降低室外换热器组件3结霜的风险,此时即使用户将室内风机102的风档调整为高档,使冷媒中的大部分热量被配置为对室内升温,冷媒也会有足够的热量进入室外换热器组件3,且被配置为提高室外换热器组件3的温度,可以避免室外换热器组件3结霜。
在步骤S74B,判断Tomin≥N1或Tlmin≥N2是否成立。
在此情况下,室内机10出风温度较低,室内换热器101液管温度较低,需要进一步对室内机10出风温度的最小值Tomin、室内换热器101液管温度的最小值Tlmin进行检测,以根据最终的检测结果调整室内风机102的转速。
若是,则转为步骤S75B;若否,则转为步骤S76B。
在步骤S75B,控制室内风机102的风档为第二预设风档。
在此情况下,控制室内风机102的风档为第二预设风档,使冷媒中的一小部分热量被配置为对室内升温,从而使冷媒会有足够的热量进入室外换热器组件3,且被配置为提高室外换热器组件3的温 度,从而避免室外换热器组件3结霜。
在步骤S76B,控制室内风机102停止运行。
在此情况下,室内机10出风温度低,室内换热器101液管温度低,空调系统100的制热性能差,室外换热器组件3结霜的风险高,此时控制室内风机102停止运行,可以使冷媒中的少部分热量被配置为对室内升温,从而使冷媒中的大部分热量进入室外换热器组件3,且被配置为提高室外换热器组件3的温度,避免室外换热器组件3结霜。
在一些实施例中,控制器40还被配置为:在空调系统100运行制热模式时,若任一室外机20的第三温度传感器78检测到的室外环境温度小于或等于第一温度阈值A,室外机20的Te1和室外机20的Te2中的任一者小于或等于第二温度阈值B,且空调系统100在制热模式的持续运行时间达到第一设定时长,则判断空调系统100满足除霜条件,控制空调系统100运行第一除霜模式或第二除霜模式;例如,空调系统100运行第一除霜模式时,空调系统100对至少一个第一部分31进行除霜,空调系统100运行第二除霜模式时,空调系统100对至少一个第二部分32进行除霜。这样一来,可以准确判断空调系统100是否进行除霜,有利于提高空调系统100除霜的灵敏度和可靠性。
可以理解的是,当空调系统100包括一个室外机20时,该室外机20的第三温度传感器78检测到的室外环境温度小于或等于第一温度阈值A,该室外机20的Te1和Te2中的任一者小于或等于第二温度阈值B,则控制空调系统100运行除霜模式。当空调系统100包括多个(大于或等于2个)室外机20时,任一室外机20的第三温度传感器78检测到的室外环境温度Ta小于或等于第一温度阈值A,多个室外机20的Te1和多个室外机20的Te2中的任一者小于或等于第二温度阈值B时,则控制器40控制空调系统100运行除霜模式。也即,触发空调系统100进入除霜模式的温度参数可以来自同一个室外机20的检测组件检测到的参数,也可以分别来自不同的室外机20的检测组件检测到的参数。
例如,第一温度阈值A可以在-7℃至7℃的区间内取值,例如,第一温度阈值A可以为-6℃、-5℃、-4℃、-3℃、-2℃、-1℃、0℃、1℃、2℃、3℃、4℃、5℃或6℃等。
例如,第二温度阈值B可以在-5℃至0℃的区间内取值,第二温度阈值B可以为-5℃、-4℃、-3℃、-2℃、-1℃或0℃等。
例如,第一设定时长大于或等于10min,例如,第一设定时长可以为10min、11min、12min、13min或14min等。
例如,若空调系统100包括多个(大于或等于2个)室外机20,当空调系统100运行第一除霜模式时,空调系统100可以对一个室外机20的第一部分31进行除霜,也可以对部分室外机20的第一部分31同时进行除霜,还可以对多个室外机20的第一部分31同时进行除霜。
例如,若空调系统100包括多个(大于或等于2个)室外机20,当空调系统100运行第二除霜模式时,空调系统100可以对一个室外机20的第二部分32进行除霜,也可以对部分室外机20的第二部分32同时进行除霜,还可以对多个室外机20的第二部分32同时进行除霜。
在一些实施例中,请参阅图4和图6,室外机20的第五支路45的第二端与第二部分32的第二端相连通,第一支路41的第二端与第二部分321的第一端相连通。第四温度传感器76设置于第一部分31的第一端,被配置为检测第一部分31的第一端的温度Tg1;控制器40与第四温度传感器76电连接,控制器40还被配置为:当空调系统100运行第一除霜模式时,若至少一个第一部分31的Tg1大于或等于第三温度阈值C且持续第二设定时长,则判断空调系统100对至少一个第一部分31除霜完毕,控制空调系统100退出第一除霜模式。这样一来,可以在第一除霜模式结束条件满足时,及时退出第一除霜模式,从而有利于提高空调系统100的智能化程度和可靠性。
可以理解的是,当对多个室外机20的第一部分31同时进行除霜时,多个室外机20的Tg1均大于或等于第三温度阈值C时,则控制器40控制空调系统100退出第一除霜模式。
在一些实施例中,室外机20的第五支路45的第二端与第二部分32的第二端相连通,第一支路41的第二端与第二部分321的第一端相连通。第五温度传感器77设置于第二部分32的第一端,被配置为检测第二部分的第一端的温度Tg2;控制器40与第五温度传感器77电连接,控制器40还被配置为:当空调系统100运行第二除霜模式时,若至少一个第二部分32的Tg2大于或等于第三温度阈值C且持续第二设定时长,则判断空调系统100对至少一个第二部分32除霜完毕,控制空调系统100退出第二除霜模式。这样一来,可以在第二除霜模式结束条件满足时,及时退出第二除霜模式,从而有利于提高空调系统100的智能化程度和可靠性。
可以理解的是,当对多个室外机20的第二部分32同时进行除霜时,多个室外机20的Tg2均大于或等于第三温度阈值C时,则空调系统100退出第二除霜模式。
例如,第三温度阈值C可以在10℃至25℃的区间内取值,例如第三温度阈值C可以为10℃、11℃、12℃、13℃、14℃、15℃、16℃、17℃、18℃、19℃、20℃、21℃、22℃、23℃、24℃或25℃等。
例如,第二设定时长可以在5秒至30秒的区间内取值,例如,第二设定时长可以为5秒、10秒、15秒、20秒、25秒或30秒等。
在一些实施例中,请参阅图4和图6,第一压力传感器71设置于压缩机21的吸气口211处,控制器40与第一压力传感器71电连接。控制器40还被配置为:当空调系统100对一个室外机20的第一部分31进行除霜时,获取一个室外机20的吸气口211的最大吸气压力Psmax;当空调系统对一个室外机20的第二部分32进行除霜时,调节一个室外机20的节流组件56的流量度,使P2满足第二预设条件,第二预设条件包括:第二部分32的冷凝压力P2≥Psmax,P2为K1*Tg2+K2*Te2所对应的饱和压力,0.5≤K1≤0.9,0.1≤K2≤0.5。这样一来,可以使得第二部分32内的冷凝温度大于0℃,保证了对第二部分32的除霜速度和除霜效果。
例如,K1和K2的取值可以为K1=0.9,K2=0.1;或者,K1和K2的取值也可以为K1=0.5,K2=0.5;或者,K1和K2的取值也可以为K1=0.7,K2=0.3。
例如,还可以设定具体参数值,例如,使P2大于0.7MPa(对应饱和温度为0℃),例如,P2可以大于或等于1.0MPa,且小于或等于1.2MPa。这样一来,既可以保证对第二部分32的除霜速度和除霜效果,还可以保证空调系统的制热性能,提高用户的舒适度。
在一些实施例中,控制器40还被配置为:当空调系统100对一个室外机20的第二部分32进行除霜时,调节一个室外机20的第一节流阀51流量度,使△T满足第一预设条件,第一预设条件包括:△T大于或等于10℃,且小于或等于第四温度阈值D,其中,△T=Te2-Tg2。这样一来,可以使得冷媒在第二部分32内充分换热冷凝,以保证对第二部分32的除霜效果。
例如,第四温度阈值D可以在20℃至30℃的区间内取值,例如第四温度阈值D可以为20℃、25℃、30℃等。△T的取值可以为10℃、15℃、20℃、25℃、30℃等。
在一些实施例中,如图3所示,第二压力传感器72设置于压缩机21的排气口212处,第六温度传感器73设置于压缩机21的排气口212处。控制器40与第二压力传感器72和第六温度传感器73均电连接,控制器40还被配置为:当空调系统100对一个室外机20的第一部分31进行除霜时,调节一个室外机20的第三节流阀53流量度,使压缩机21的吸气过热度Tssh和排气过热度Tdsh满足第三预设条件。第三预设条件包括:此室外机20的压缩机21的吸气过热度Tssh大于或等于第五温度阈值E,压缩机21的排气过热度Tdsh大于或等于第六温度阈值F。可以理解的是,Tssh=Tg2-Tc_ps,Tc_ps为吸气口211处的吸气压力Ps对应的饱和温度,Tdsh=Td-Tc_pd,Td为压缩机21的排气口212的温度,Tc_pd为排气口212处的排气压力Pd对应的饱和温度。这样一来,可以防止压缩机21带液压缩,有利于提高空调系统100的可靠性。
在一些实施例中,控制器40还被配置为:当空调系统100对一个室外机20的第二部分32进行除霜时,调节一个室外机20的第二节流阀52流量度,使压缩机21的吸气过热度Tssh和排气过热度Tdsh满足第三预设条件。
例如,第六温度阈值F可以在0℃至10℃的区间内取值,例如第六温度阈值F可以为0℃、1℃、2℃、3℃、4℃、5℃、6℃、7℃、8℃、9℃、10℃等。
例如,第五温度阈值E可以在20℃至40℃的区间内取值,例如第五温度阈值E可以为20℃、25℃、30℃、35℃或40℃等。
在一些实施例中,请参阅图32,空调系统100为多联机空调系统100,多联机空调系统100包括N个室外机20,N个室外机20并联连接于室内换热器101的第一端和第二端之间。例如,N≥2。这样一来,可以提升空调系统100的性能,提高用户的使用体验。
在一些实施例中,空调系统100包括N个室外机20时,控制器40还被配置为:控制空调系统100运行第一除霜模式时,控制空调系统100对N个室外机20的N个第一部分31进行除霜;控制空调系统运行第二除霜模式时,控制空调系统100对N个室外机20的N个第二部分32进行除霜。这样一来,对N个室外机20完成除霜所需的总时间短,且控制简单,可使用单个室外机20除霜的单模块控制逻辑,此外,除霜完成后N个室外机20的状态一致,可防止出现部分室外机20结霜严重导致的 室外机间偏流现象。
在一些实施例中,空调系统100包括N个室外机20时,控制器40还被配置为:获取N个室外机20的除霜次序;控制空调系统100交替运行第一除霜模式和第二除霜模式,以根据除霜次序依次对N个室外机20的室外换热器组件3进行除霜;例如,控制空调系统100运行第一除霜模式时,控制空调系统100对一个室外机20的第一部分31进行除霜,控制空调系统100运行第二除霜模式时,控制空调系统100对一个室外机的第二部分32进行除霜。也即,空调系统100对一个室外机20的第一部分31和第二部分32均完成除霜后,对下一个室外机20的第一部分31和第二部分32进行除霜直至将N个室外机20的第一部分31和第二部分32除霜完毕。对每个室外机20进行除霜时,可以先对第一部分31进行除霜,也可以先对第二部分32进行除霜。这样一来,除霜时,用于制热的蒸发器的数量较多,空调系统100的制热性能较强。
在一些实施例中,本公开的一些实施例还提供一种空调系统的除霜控制方法,请参阅图33,该除霜控制方法包括步骤S1B至步骤S6B。
在步骤S1B,控制空调系统运行制热模式。
例如,在空调系统100运行制热模式时,控制每个室外机20的换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至全关状态。
在步骤S2B,判断空调系统是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S1B;若空调系统100满足除霜条件,转向步骤S3B。除霜条件包括室外环境温度、空调系统100的运行时长,以及至少一个第一部分的温度或至少一个第二部分的温度。
在步骤S3B,控制空调系统运行第一除霜模式。
这样,空调系统100可以对至少一个第一部分31进行除霜。例如,调节室外机20的第二节流阀52至全关状态,控制第一通断阀55切换为打开状态。此时,对第一部分31进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
例如,在室外机20包括第一温度传感器74、第二温度传感器75和第三温度传感器78的情况下,在空调系统100运行制热模式时,若任一室外机20的第三温度传感器78检测到的室外环境温度小于或等于第一温度阈值A,室外机20的Te1和室外机20的Te2中的任一者小于或等于第二温度阈值B,且空调系统100运行在制热模式的持续运行时间达到第一设定时长,则判断空调系统100满足除霜条件。第一温度阈值A、第二温度阈值B和第一设定时长的取值如前所述,不再赘述。
在步骤S4B,判断空调系统是否满足第一除霜模式结束条件。
若空调系统100未满足第一除霜模式结束条件,返回步骤S3B;若空调系统100满足第一除霜模式结束条件,转向步骤S5B。
在步骤S5B,控制空调系统运行第二除霜模式。
这样,空调系统可以对至少一个第二部分32进行除霜。例如,控制当前运行第一除霜模式的室外机20的第二通断阀54切换为关闭状态,调节第二节流阀52至节流状态,调节第三节流阀53至全关状态,调节节流组件56至节流状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至节流状态。此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
例如,室外机20的第五支路45的第二端与第二部分32的第二端相连通,第一支路41的第二端与第二部分321的第一端相连通。在室外机20包括第四温度传感器76的情况下,当空调系统100运行第一除霜模式时,若至少一个第一部分31的Tg1大于或等于第三温度阈值C且持续第二设定时长,则判断空调系统100对至少一个第一部分31除霜完毕,即判断空调系统100满足第一除霜模式结束条件。第三温度阈值C和第二设定时长如前所述,不再赘述。
在步骤S6B,判断空调系统是否满足第二除霜模式结束条件。
若空调系统100未满足第二除霜模式结束条件,返回步骤S5B;若空调系统100满足第二除霜模式结束条件,退出第二除霜模式,返回步骤S1B。
此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在一些实施例中,空调系统100退出第二除霜模式后也可以运行其他模式,如送风模式等。
例如,室外机20的第五支路45的第二端与第二部分32的第二端相连通,第一支路41的第二端与第二部分321的第一端相连通。在室外机20包括第五温度传感器77的情况下,当空调系统100运行第二除霜模式时,若至少一个第二部分32的Tg2大于或等于第三温度阈值C且持续第二设定时长,则判断空调系统100对至少一个第二部分32除霜完毕,即判断空调系统100满足第二除霜模式结束条件。第三温度阈值C和第二设定时长如前所述,不再赘述。
在一些实施例中,请参阅图34,空调系统100的除霜控制方法还包括步骤S1C至S6C。
在步骤S1C,控制空调系统运行制热模式。
例如,在空调系统100运行制热模式时,控制器40控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态,控制第一通断阀55切换为关闭状态,调节第一节流阀51至全关状态。
在步骤S2C,判断空调系统是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S1C;若空调系统100满足除霜条件,转向步骤S3C。除霜条件包括室外环境温度、空调系统100的运行时长,以及至少一个第一部分的温度或至少一个第二部分的温度。
在步骤S3C,控制空调系统运行第二除霜模式。
这样,空调系统100可以对至少一个第二部分32进行除霜。例如,控制室外机20的第二通断阀54切换为关闭状态,调节第三节流阀53至关闭状态,调节节流组件56至节流状态,调节第一节流阀51至节流状态。此时,对第二部分32进行除霜的室外机20内的冷媒流向如前所述,此处不再赘述。判断空调系统100满足除霜模式结束条件如前所述,此处不再赘述。
在步骤S4C,判断空调系统是否满足第二除霜模式结束条件。
若空调系统100未满足第二除霜模式结束条件,返回步骤S3C;若空调系统100满足第二除霜模式结束条件,转向步骤S5C。判断空调系统100满足第二除霜模式结束条件如前所述,此处不再赘述。
在步骤S5C,控制空调系统运行第一除霜模式。
这样,空调系统可以对至少一个第一部分31进行除霜。例如,控制当前运行第二除霜模式的室外机20的第二通断阀54切换为打开状态,调节第二节流阀52至全关状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换至打开状态、调节第一节流阀51至全关状态。此时,对第一部分31进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S6C,判断空调系统是否满足第一除霜模式结束条件。
若空调系统100未满足第一除霜模式结束条件,返回步骤S5C;若空调系统满足第一除霜模式结束条件,退出第一除霜模式,返回步骤S1C。判断空调系统100满足第一除霜模式结束条件如前所述,此处不再赘述。
例如,调节当前运行第一除霜模式的室外机20的第二节流阀52至节流状态,控制第一通断阀55切换为关闭状态。此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在一些实施例中,空调系统100退出第一除霜模式后也可以运行其他模式,如送风模式等。空调系统100运行送风模式的情况下,压缩机部工作,室内换热器和室外换热器组件均不与空气换热。室内风机102运行,向室内送风,以增加室内空气的流动性。
本公开一些实施例提供的空调系统100的除霜控制方法的有益技术效果与本公开一些实施例提供的空调系统100的有益技术效果相同,在此不再赘述。
在一些实施例中,请参阅图35,空调系统100的室外机20的数量为多个。图35以室外机20的数量为2个为例,对除霜控制方法进行说明。该除霜控制方法包括步骤S10A至步骤S60A。
在步骤S10A,控制空调系统运行制热模式。
例如,在空调系统100运行制热模式时,控制每个室外机20的控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至全关状态。
在步骤S20A,判断空调系统是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S10A;若空调系统100满足除霜条件,转向步骤 S30A。
在步骤S30A,控制空调系统运行第一除霜模式。
这样,空调系统100可以对第一个室外机20的第一部分31和第二个室外机20的第一部分31同时进行除霜。例如,调节每个室外机20的第二节流阀52至全关状态,控制第一通断阀55切换为打开状态。此时,对第一部分31进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S40A,判断空调系统是否满足第一除霜模式结束条件。
若空调系统100未满足第一除霜模式结束条件,返回步骤S30A;若空调系统100满足第一除霜模式结束条件,转向步骤S50A。判断空调系统100满足第一除霜模式结束条件如前所述,此处不再赘述。
在步骤S50A,控制空调系统100运行第二除霜模式。
这样,空调系统100可以对第一个室外机20的第二部分32和第二个室外机20的第二部分32同时进行除霜。例如,控制每个室外机20的第二通断阀54切换为关闭状态,调节第二节流阀52至节流状态,调节第三节流阀53至全关状态,调节节流组件56至节流状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至节流状态。此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S60A,判断空调系统是否满足第二除霜模式结束条件。
若空调系统100未满足第二除霜模式结束条件,返回步骤S50A;若空调系统100满足第二除霜模式结束条件,退出第二除霜模式,返回步骤S10A。判断空调系统100满足第二除霜模式结束条件如前所述,此处不再赘述。
此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。在其他一些实施例中,空调系统100退出第二除霜模式后也可以运行其他模式,如送风模式等。
在一些实施例中,请参阅图36,空调系统100的室外机20的数量为多个。图36以室外机20的数量为2个为例,对除霜控制方法进行说明。该除霜控制方法包括步骤S10B至步骤S60B。
在步骤S10B,控制空调系统运行制热模式。
例如,控制空调系统100运行制热模式时,控制每个室外机20的换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态,控制第一通断阀55切换为关闭状态,调节第一节流阀51至全关状态。
在步骤S20B,判断空调系统是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S10B;若空调系统100满足除霜条件,转向步骤S30B。
在步骤S30B,控制空调系统运行第二除霜模式。
这样,空调系统可以对第一个室外机20的第二部分32和第二个室外机20的第二部分32同时进行除霜。例如,控制每个室外机20的第二通断阀54切换为关闭状态,调节第三节流阀53至关闭状态,调节节流组件56至节流状态,调节第一节流阀51至节流状态。此时,对第二部分32进行除霜的室外机20内的冷媒流向如前所述,此处不再赘述。
在步骤S40B,判断空调系统是否满足第二除霜模式结束条件。
若空调系统100未满足第二除霜模式结束条件,返回步骤S30B;若空调系统100满足第二除霜模式结束条件,转向步骤S50B。判断空调系统100满足第二除霜模式结束条件如前所述,此处不再赘述。
在步骤S50B,控制空调系统100运行第一除霜模式。
这样,空调系统可以对第一个室外机20的第一部分31和第二个室外机20的第一部分31同时进行除霜。例如,控制每个室外机20的第二通断阀54切换为打开状态,调节第二节流阀52至全关状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换为打开状态、调节第一节流阀51至全关状态。此时,对第一部分31进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S60B,判断空调系统100是否满足第一除霜模式结束条件。
若空调系统100未满足第一除霜模式结束条件,返回步骤S50B;若空调系统100满足第一除霜模式结束条件,退出第一除霜模式,返回步骤S10B。判断空调系统100满足第一除霜模式结束条件如前所述,此处不再赘述。
此时,对第二部分32进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
在一些实施例中,空调系统100退出第一除霜模式后也可以运行其他模式,如送风模式等。
在一些实施例中,请参阅图37,空调系统100的室外机20的数量为多个。图37以室外机20的数量为2个为例,对除霜控制方法进行说明。该除霜控制方法包括步骤S100A至步骤S1000A。
在步骤S100A,控制空调系统100运行制热模式。
例如,在控制空调系统100运行制热模式时,控制每个室外机20的控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至全关状态。
在步骤S200A,判断空调系统100是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S100A;若空调系统100满足除霜条件,转向步骤S300A。
在步骤S300A,控制空调系统100运行第一除霜模式,对第一个室外机的第一部分进行除霜。
例如,调节第一个室外机20的第二节流阀52至全关状态,控制第一通断阀55切换为打开状态。此时,第一个室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S400A,判断空调系统是否满足第一除霜模式结束条件。
若空调系统未满足第一除霜模式结束条件,返回步骤S300A;若空调系统满足第一除霜模式结束条件,转向步骤S500A。判断空调系统100满足第一除霜模式结束条件如前所述,此处不再赘述。
在步骤S500A,控制空调系统100运行第二除霜模式,对第一个室外机的第二部分进行除霜。例如,控制第一个室外机20的第二通断阀54切换为关闭状态,调节第二节流阀52至节流状态,调节第三节流阀53至全关状态,调节节流组件56至节流状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至节流状态。此时,第一个室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S600A,判断空调系统是否满足第二除霜模式结束条件。
若空调系统未满足第二除霜模式结束条件,返回步骤S500A;若空调系统满足第二除霜模式结束条件,转向步骤S700A。判断空调系统100满足第二除霜模式结束条件如前所述,此处不再赘述。
在步骤S700A,控制空调系统运行第一除霜模式,对第二个室外机的第一部分进行除霜。
例如,控制第一个室外机20的第二通断阀54切换为打开状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态,调节第一节流阀51至全关状态;调节第二个室外机20的第二节流阀52至全关状态,控制第一通断阀55切换为打开状态。
可以理解的是,控制空调系统对第二个室外机20的第一部分31进行除霜时,控制第一个室外机20与室内换热器101运行制热模式。此时,第二个室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S800A,判断空调系统是否满足第一除霜模式结束条件。
若空调系统未满足第一除霜模式结束条件,返回步骤S700A;若空调系统满足第一除霜模式结束条件,转向步骤S900A。
空调系统100满足第一除霜模式结束条件如前所述,此处不再赘述。
在步骤S900A,控制空调系统运行第二除霜模式,对第二个室外机的第二部分进行除霜。
例如,控制第二个室外机20的第二通断阀54切换为关闭状态,调节第二节流阀52至节流状态,调节第三节流阀53至全关状态,调节节流组件56至节流状态、控制第一通断阀55切换为关闭状态、调节第一节流阀51至节流状态。此时,第二个室外机20的冷媒流向如前所述,此处不再赘述。
在步骤S1000A,判断空调系统是否满足第二除霜模式结束条件。
若空调系统未满足第二除霜模式结束条件,返回步骤S900A;若空调系统满足第二除霜模式结束条件,返回步骤S1000A。空调系统100满足第二除霜模式结束的条件如前所述,此处不再赘述。
在一些实施例中,请参阅图38,空调系统100的室外机20的数量为多个。图38以室外机20的数量为2个为例,对除霜控制方法进行说明。该除霜控制方法包括步骤S100B至步骤S1000B。
S100B,控制空调系统运行制热模式。
例如,在空调系统100运行制热模式时,控制每个室外机20的控制换向组件6的第一阀口61与第二阀口62导通,第三阀口63与第四阀口64导通,控制第二通断阀54切换为打开状态,调节第二节流阀52至节流状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、调节第一通断 阀55至关闭状态、调节第一节流阀51至全关状态。
S200B,判断空调系统是否满足除霜条件。
若空调系统100未满足除霜条件,返回步骤S100B;若空调系统100满足除霜条件,转向步骤S300B。
S300B,控制空调系统运行第二除霜模式,对第一个室外机的第二部分进行除霜。
例如,控制第一个室外机20的第二通断阀54切换为关闭状态,调节第三节流阀53至关闭状态,调节节流组件56至节流状态,调节第一节流阀51至节流状态。此时,第一个室外机20内的冷媒流向如前所述,此处不再赘述。
S400B:判断空调系统是否满足第二除霜模式结束条件。
若空调系统未满足第二除霜模式结束条件,返回步骤S300B;若空调系统满足第二除霜模式结束条件,转向步骤S500B。空调系统100满足第二除霜模式结束的条件如前所述,此处不再赘述。
S500B:控制空调系统运行第一除霜模式,对第一个室外机的第一部分进行除霜。
例如,控制第一个室外机20的第二通断阀54切换为打开状态,调节第二节流阀52至全关状态,调节第三节流阀53至节流状态,调节节流组件56至全关状态、控制第一通断阀55切换为打开状态、调节第一节流阀51至全关状态。此时,第一个室外机20的冷媒流向如前所述,此处不再赘述。
S600B,判断空调系统是否满足第一除霜模式结束条件。
若空调系统未满足第一除霜模式结束条件,返回步骤S500B;若空调系统满足第一除霜模式结束条件,转向步骤S700B。空调系统100满足第一除霜模式结束的条件如前所述,此处不再赘述。
S700B,控制空调系统100运行第二除霜模式,对第二个室外机的第二部分进行除霜。
例如,调节第一个室外机20的第二节流阀52至节流状态,控制第一通断阀55切换为关闭状态;控制第二个室外机20的第二通断阀54切换为关闭状态,调节第三节流阀53至关闭状态,调节节流组件56至节流状态,调节第一节流阀51至节流状态。此时,第二个室外机20内的冷媒流向如前所述,此处不再赘述。
可以理解的是,控制空调系统100对第二个室外机20的第二部分32进行除霜时,控制第一个室外机20与室内换热器101运行制热模式。
S800B,判断空调系统是否满足第二除霜模式结束条件。
若空调系统未满足第二除霜模式结束条件,返回步骤S700B;若空调系统满足第二除霜模式结束条件,转向步骤S900B。空调系统100满足第二除霜模式结束的条件如前所述,此处不再赘述。
S900B:控制空调系统运行第一除霜模式,对第二个室外机的第一部分进行除霜。
例如,控制第二个室外机20的第二通断阀54切换为打开状态,调节第二节流阀52至全关状态,调节第三节流阀53至节流状态,调节流组件56至全关状态、控制第一通断阀55切换为打开状态、调节第一节流阀51至全关状态。此时,对第一部分31进行除霜的室外机20的冷媒流向如前所述,此处不再赘述。
S1000B:判断空调系统是否满足第一除霜模式结束条件。
若空调系统未满足第一除霜模式结束条件,返回步骤S900B;若空调系统满足第一除霜模式结束条件,返回步骤S100B。空调系统100满足第一除霜模式结束的条件如前所述,此处不再赘述。
上述主要从空调系统100的角度对本公开一些实施例提供的方案进行了介绍。可以理解的是,空调系统100为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的算法步骤,本公开能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本公开的范围。
本领域的技术人员将会理解,本公开的公开范围不限于上述具体实施例,并且可以在不脱离本公开的精神的情况下对实施例的某些要素进行修改和替换。本公开的范围受所附权利要求的限制。

Claims (25)

  1. 一种空调系统,所述空调系统包括:
    室内机,包括室内换热器;以及,
    室外机,包括:
    压缩机,包括吸气口和排气口;
    第一支路;以及,
    室外换热器组件,包括第一部分和第二部分,所述第一部分通过所述第一支路与所述第二部分连通;
    其中,在所述空调系统运行免除霜模式的情况下,所述室内换热器与所述压缩机的所述排气口连通,且与所述第二部分连通;所述第一部分与所述压缩机的所述吸气口连通;
    所述第一部分位于所述第二部分的一侧,在垂直于由所述第一部分指向所述第二部分的方向的平面内,所述第一部分的至少部分和所述第二部分的至少部分的投影重合,所述第二部分被配置为与所述第一部分换热。
  2. 根据权利要求1所述的空调系统,其中,所述第一支路的第一端与所述第二部分的第一端连通,所述第一支路的第二端和所述第一部分的第二端连通;
    在所述空调系统运行所述免除霜模式的情况下,所述压缩机内的冷媒由所述排气口依次进入所述室内换热器、所述第二部分,对所述第二部分进行加热,并通过所述第一部分、所述吸气口返回所述压缩机。
  3. 根据权利要求1或2所述的空调系统,其中,所述室外机还包括:室外风机,所述第二部分、所述第一部分沿所述室外风机工作时产生的气流方向依次设置;
    所述室外机被配置为:在所述空调系统运行免除霜模式运行的情况下,工作并产生气流,以将所述第二部分附近的空气吹向所述第一部分,使所述第二部分的热量传递给所述第一部分。
  4. 根据权利要求1至3中任一项所述的空调系统,其中,所述第一部分位于所述第二部分的正上方;或者,所述第一部分位于所述第二部分的正下方。
  5. 根据权利要求1至4中任一项所述的空调系统,其中,所述室外机还包括:
    换向组件,所述换向组件的第一阀口与所述排气口连通,所述换向组件的第二阀口与所述室内换热器的第一端连通,所述换向组件的第三阀口与所述第一部分的第一端、所述第二部分的第一端分别连通,所述换向组件的第四阀口与所述吸气口连通;
    第二支路,所述第二支路的第一端与所述第一部分的第二端连通,所述第二支路的第二端与所述室内换热器的第二端连通;
    第三支路,所述第三支路的第一端与所述第二部分的第二端连通,所述第三支路的第二端与所述室内换热器的所述第二端连通;
    第二节流阀,设置于所述第二支路;
    第三节流阀,设置于所述第三支路;以及,
    第二通断阀,设置于所述第三阀口与所述第二部分的所述第一端之间。
  6. 根据权利要求1至5中任一项所述的空调系统,其中,所述室外机还包括第四支路;所述第四支路的第一端与所述压缩机的排气口连通,所述第四支路的第二端与所述第一部分的第二端连通;
    在所述空调系统运行除霜模式的情况下,所述第四支路被配置为使所述压缩机内的冷媒由所述排气口进入所述第一部分,以对所述第一部分进行加热,并通过所述吸气口返回所述压缩机。
  7. 根据权利要求1至6中任一项所述的空调系统,其中,所述室外机还包括第五支路,所述第五支路的第一端与所述排气口相连通,所述第五支路的第二端与所述第二部分的第二端相连通;
    在所述空调系统运行除霜模式的情况下,所述第五支路被配置为使所述压缩机内的冷媒由所述排气口进入所述第二部分,以对所述第二部分进行加热,并通过所述吸气口返回所述压缩机。
  8. 根据权利要求1至7中任一项所述的空调系统,其中,所述空调系统还包括:控制器,
    所述控制器被配置为:
    若所述空调系统满足免除霜模式开始条件,控制所述第一支路导通,以使所述室外机的所述压缩机的冷媒对所述第二部分进行加热,并使所述第二部分对所述第一部分进行加热;
    若所述空调系统满足免除霜模式结束条件,所述空调系统运行在预设工作模式。
  9. 根据权利要求8所述的空调系统,其中,所述控制器被配置为:若所述空调系统满足免除霜模 式开始条件,调节所述压缩机的第一吸气过热度Tssh1大于或等于第一阈值d,并调节所述压缩机的排气过热度Tdsh大于或等于第二阈值e;
    其中,0℃≤d<e,Tssh1=Tg1-Tcps,且Tdsh=Td-Tcpd;Tg1为所述第一部分的第一端的温度,Td为所述压缩机的排气口的排气温度,Tcps为所述压缩机的吸气压力对应的饱和温度,Tcpd为所述压缩机的排气压力对应的饱和温度。
  10. 根据权利要求9所述的空调系统,其中,
    d的取值范围为:0℃≤d<3℃、3℃≤d<6℃或者6℃≤d≤10℃;
    和/或,
    e的取值范围为:20℃≤e<28℃、28℃≤e<36℃或者36℃≤e≤40℃。
  11. 根据权利要求8至10中任一项所述的空调系统,其中,
    所述免除霜模式开始条件包括:室外环境的温度的最小值Tamin小于或等于第三阈值a,所述第一部分的第二端的温度的最小值Te1min或者所述第二部分的第二端的温度的最小值Te2min小于或者等于第四阈值b,且所述空调系统在制热模式下的累积运行时间达到第五阈值c;
    其中,-7℃<a<7℃,b≤0℃,10min≤c。
  12. 根据权利要求11所述的空调系统,其中,
    -7℃<a<7℃,b=0℃,10min≤c<20min;
    或者,-7℃<a<7℃,-5℃≤b<0℃,20min≤c<30min;
    或者,-7℃<a<7℃,b<-5℃,c≥30min。
  13. 根据权利要求9或10所述的空调系统,其中,所述控制器还被配置为:若所述空调系统满足所述免除霜模式结束条件,控制第四支路导通,以使所述压缩机内的冷媒由所述排气口通过所述第四支路进入所述第一部分,并对所述第一部分进行加热。
  14. 根据权利要求13所述的空调系统,其中,所述控制器还被配置为:
    在所述空调系统满足所述免除霜模式结束条件,所述控制器控制第四支路导通之前,调节所述压缩机的第二吸气过热度Tssh2,使Tssh2≥d;以及,
    调节所述压缩机的排气过热度Tdsh,使Tdsh≥e;
    其中,Tssh2=Tg2-Tcps,Tg2为所述第二部分的第一端的温度。
  15. 根据权利要求8至13中任一项所述的空调系统,其中,所述室内机包括室内风机;所述控制器还被配置为:
    若所述空调系统满足所述免除霜模式开始条件,将所述压缩机的排气压力的最小值Pdmin分别与第一阈值压力h、第二阈值压力I进行比较,并得到比较结果;
    若Pdmin≥h,则控制所述室内风机的风档为第一预设风档;
    若Pdmin<I,则控制所述室内风机停止运行;以及,
    若I≤Pdmin<h,则控制所述室内风机的风档为第二预设风档;
    其中,I<h,所述室内风机在所述第二预设风档时的转速,小于所述室内风机最高转速。
  16. 根据权利要求15所述的空调系统,其中,1.5MPa≤h≤2MPa,1MPa≤I≤1.5MPa,所述室内风机在所述第二预设风档时的转速,小于所述室内风机最高转速的二分之一。
  17. 根据权利要求8至16中任一项所述的空调系统,其中,所述室内机包括室内风机;所述控制器还被配置为:
    若所述空调系统满足所述免除霜模式开始条件,将所述室内机的出风温度的最小值Tomin分别与第一阈值温度M1、第二阈值温度N1进行比较,并得到比较结果;
    将所述室内换热器的液管温度的最小值Tlmin与第三阈值温度M2和第四阈值温度N2分别进行比较,并得到比较结果;
    若Tomin≥M1或Tlmin≥M2,则控制所述室内风机的风档为第一预设风档;
    若Tomin<N1且Tlmin<N2,则控制所述室内风机停止运行;以及,
    若N1≤Tomin<M1或N2≤Tlmin<M2,则控制所述室内风机的风档为第二预设风档;
    其中,N1<M1,N2<M2,所述室内风机在所述第二预设风档时的转速,小于所述室内风机最高转速。
  18. 根据权利要求17所述的空调系统,其中,
    5℃≤M1≤35℃,15℃≤N1≤25℃,20℃≤M2≤40℃,10℃≤N2≤25℃;
    所述室内风机在所述第二预设风档时的转速,小于所述室内风机最高转速的二分之一。
  19. 一种空调系统,包括:
    室外机,包括:
    压缩机,包括吸气口和排气口;
    换向组件,包括第一阀口、第二阀口、第三阀口和第四阀口,所述第一阀口与所述排气口相连通,所述第四阀口与所述吸气口相连通;
    室外换热器组件,包括第一部分和第二部分;所述第一部分的第一端与所述第三阀口相连通;
    第四支路,所述第四支路的第一端与所述排气口相连通,所述第四支路的第二端与所述第一部分的第二端相连通;
    第五支路和第一支路,所述第五支路的第一端与所述排气口相连通,所述第一支路的第一端与所述第一部分的所述第二端相连通;所述第五支路的第二端和所述第一支路的第二端中的一者与所述第二部分的第二端相连通,另一者与所述第二部分的第一端相连通;以及,
    第一通断阀、第二通断阀、第一节流阀、第二节流阀、第三节流阀和节流组件,所述第一通断阀设置于所述第四支路,所述第二通断阀设置于所述第二部分的所述第一端与所述第三阀口之间,所述第一节流阀设置于所述第一支路,所述节流组件设置于所述第五支路;
    室内换热器,所述室内换热器的第一端与所述第二阀口相连通;所述第二节流阀设置于所述室内换热器的第二端与所述第一部分的所述第二端之间,所述第三节流阀设置于所述室内换热器的所述第二端与所述第二部分的所述第二端之间;以及,
    控制器,与所述室内换热器和所述室外机均电连接,被配置为:
    当控制所述空调系统对所述室外机的所述第一部分进行除霜时,控制所述室外机的所述第一阀口和所述第二阀口导通,所述第三阀口和所述第四阀口导通,所述第一通断阀和所述第二通断阀打开,所述第一节流阀和所述节流组件全关,所述第三节流阀节流;以及,
    当控制所述空调系统对所述室外机的所述第二部分进行除霜时,控制所述室外机的所述第一阀口和所述第二阀口导通,所述第三阀口和所述第四阀口导通,所述第一节流阀、所述第二节流阀和所述节流组件节流,所述第一通断阀和所述第二通断阀关闭。
  20. 根据权利要求19所述的空调系统,其中,
    所述室外机还包括:
    第一温度传感器,设置于所述第一部分的所述第二端,且被配置为检测所述第一部分的所述第二端的温度Te1;
    第二温度传感器,设置于所述第二部分的所述第二端,且被配置为检测所述第二部分的所述第二端的温度Te2;和,
    第三温度传感器,被配置为检测室外环境温度Ta;
    所述控制器与所述第一温度传感器、所述第二温度传感器和所述第三温度传感器均电连接,所述控制器还被配置为:
    在所述空调系统运行制热模式时,若所述室外机的所述第三温度传感器检测到的所述室外环境温度小于或等于第一温度阈值,所述室外机的Te1和所述室外机的Te2中的任一者小于或等于第二温度阈值,且所述空调系统在制热模式的持续运行时间达到第一设定时长,则判断所述空调系统满足除霜条件;以及,
    控制所述空调系统运行第一除霜模式或第二除霜模式;
    其中,所述空调系统运行所述第一除霜模式时,所述空调系统对所述室外机的所述第一部分进行除霜,所述空调系统运行所述第二除霜模式时,所述空调系统对所述室外机的所述第二部分进行除霜。
  21. 根据权利要求20所述的空调系统,其中,
    所述第五支路的第二端与所述第二部分的第二端相连通,所述第一支路的第二端与所述第二部分的第一端相连通;
    所述室外机和所述控制器还满足如下至少之一:
    所述室外机还包括第四温度传感器,所述第四温度传感器设置于所述第一部分的第一端,被配置为检测所述第一部分的所述第一端的温度Tg1;所述控制器与所述第四温度传感器电连接,且还被配 置为:当所述空调系统运行第一除霜模式时,若所述室外机的所述第一部分的Tg1大于或等于第三温度阈值且持续第二设定时长,则判断所述空调系统对所述室外机的所述第一部分除霜完毕,控制所述空调系统退出所述第一除霜模式;或者,
    所述室外机还包括第五温度传感器,所述第五温度传感器设置于所述第二部分的第一端,被配置为检测所述第二部分的所述第一端的温度Tg2;所述控制器与所述第五温度传感器电连接,且还被配置为:当所述空调系统运行所述第二除霜模式时,若所述室外机的所述第二部分的Tg2大于或等于第三温度阈值且持续第二设定时长,则判断所述空调系统对所述室外机的所述第二部分除霜完毕,控制所述空调系统退出所述第二除霜模式。
  22. 根据权利要求21所述的空调系统,其中,所述空调系统还满足如下至少之一:
    所述控制器还被配置为:当所述空调系统对所述室外机的所述第二部分进行除霜时,调节所述室外机的所述第一节流阀流量度,使△T满足第一预设条件,其中,△T=Te2-Tg2;所述第一预设条件包括:△T大于或等于10℃,且小于或等于第四温度阈值;和/或,
    所述室外机还包括第一压力传感器,所述第一压力传感器设置于所述吸气口处,被配置为检测所述压缩机的吸气压力Ps;
    所述控制器与所述第一压力传感器电连接,且还被配置为:当所述空调系统对所述室外机的所述第一部分进行除霜时,获取所述室外机的所述吸气口的最大吸气压力Psmax;以及,
    当所述空调系统对所述室外机的所述第二部分进行除霜时,调节所述室外机的所述节流组件的流量度,使P2满足第二预设条件,P2为(K1*Tg2+K2*Te2)所对应的饱和压力;
    其中,所述第二预设条件为:P2≥Psmax,0.5≤K1<0.7或者0.7≤K1≤0.9,0.1≤K2<0.3或者0.3≤K2≤0.5。
  23. 根据权利要求20或者21所述的空调系统,其中,包括:
    N个室外机,所述N个室外机并联连接于所述室内换热器的所述第一端和所述第二端之间,且N≥2;
    所述控制器还被配置为:
    当控制所述空调系统运行所述第一除霜模式时,控制所述空调系统对所述N个室外机的所述第一部分进行除霜;以及,
    当控制所述空调系统运行所述第二除霜模式时,控制所述空调系统对所述N个室外机的所述第二部分进行除霜。
  24. 根据权利要求20至23中任一项所述的空调系统,其中,包括:
    N个室外机,所述N个室外机并联连接于所述室内换热器的所述第一端和所述第二端之间,且N≥2;
    所述控制器还被配置为:
    获取所述N个室外机的除霜次序;以及,
    当控制所述空调系统交替运行所述第一除霜模式和所述第二除霜模式,以根据所述除霜次序对所述N个室外机的所述室外换热器组件进行除霜;
    其中,当控制所述空调系统运行所述第一除霜模式时,控制所述空调系统对一个所述室外机的所述第一部分进行除霜;当控制所述空调系统运行所述第二除霜模式时,控制所述空调系统对一个所述室外机的所述第二部分进行除霜。
  25. 一种空调系统的除霜控制方法,其中,所述除霜控制方法应用于权利要求19至24中任一项所述的空调系统,
    所述除霜控制方法满足如下之一:
    所述除霜控制方法包括:
    在所述空调系统运行制热模式时,若所述空调系统满足除霜条件,控制所述空调系统运行第一除霜模式,以对所述室外机的所述第一部分进行除霜,其中,所述除霜条件包括室外环境温度、所述空调系统的运行时长,以及所述室外机的所述第一部分的温度或所述室外机的所述第二部分的温度;
    若所述空调系统对所述室外机的所述第一部分除霜完毕,控制所述空调系统退出所述第一除霜模式,并运行第二除霜模式,以对所述室外机的所述第二部分进行除霜;
    若所述空调系统对所述室外机的所述第二部分除霜完毕,控制所述空调系统退出所述第二除霜模 式;
    或者,
    所述除霜控制方法包括:
    在所述空调系统运行制热模式时,若所述空调系统满足除霜条件,控制所述空调系统运行第二除霜模式,以对所述室外机的所述第二部分进行除霜,所述除霜条件包括室外环境温度、所述空调系统的运行时长,以及至少一个所述第一部分的温度或至少一个所述第二部分的温度;
    若所述空调系统对所述室外机的所述第二部分除霜完毕,控制所述空调系统退出所述第二除霜模式,并运行第一除霜模式,以对所述室外机的所述第一部分进行除霜;
    若所述空调系统对所述室外机的所述第一部分除霜完毕,控制所述空调系统退出所述第一除霜模式。
PCT/CN2024/075353 2023-05-05 2024-02-01 空调系统及其除霜控制方法 Pending WO2024230258A1 (zh)

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