CN112902473A - Air conditioner heat exchange structure, air conditioner external unit, air conditioner system and air conditioner system control method - Google Patents

Air conditioner heat exchange structure, air conditioner external unit, air conditioner system and air conditioner system control method Download PDF

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Publication number
CN112902473A
CN112902473A CN202110321124.XA CN202110321124A CN112902473A CN 112902473 A CN112902473 A CN 112902473A CN 202110321124 A CN202110321124 A CN 202110321124A CN 112902473 A CN112902473 A CN 112902473A
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CN
China
Prior art keywords
heat exchange
exchange module
throttling device
switch valve
valve
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Pending
Application number
CN202110321124.XA
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Chinese (zh)
Inventor
杜辉
刘华
苏玉海
余凯
江标
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.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202110321124.XA priority Critical patent/CN112902473A/en
Publication of CN112902473A publication Critical patent/CN112902473A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits

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

Abstract

The invention discloses an air conditioner heat exchange structure, an air conditioner external unit, an air conditioner system and an air conditioner system control method. The air conditioner heat exchange structure includes: at least two heat exchange modules with adjustable series-parallel relation and operation state; if the heat exchanger comprises two heat exchange modules, the first end of the first heat exchange module is connected to the first end of the second heat exchange module through the first valve assembly, and the first end of the first heat exchange module is also connected to the second end of the second heat exchange module through the first throttling device; the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second valve assembly, and the second end of the first heat exchange module is also connected to the first end of the second heat exchange module through a second throttling device; the first valve component and the second valve component are respectively provided with a connecting port as an external port. At least two heat exchange modules are arranged on the air conditioner heat exchange structure, the connection relation and the operation state of the heat exchange modules are changed through the control valve assembly and the throttling device, efficient operation under different operation modes is guaranteed, and use comfort and energy efficiency are improved.

Description

Air conditioner heat exchange structure, air conditioner external unit, air conditioner system and air conditioner system control method
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner heat exchange structure, an air conditioner outdoor unit, an air conditioner system and an air conditioner system control method.
Background
The structure of the existing air conditioning system is fixed, an outdoor heat exchanger is generally arranged in an air conditioner outdoor unit, the heat exchange mode is fixed, and for various heat exchange requirements, a single heat exchanger is difficult to meet the refrigeration or heating requirements of users. The following problems are specifically present:
(1) during refrigeration and heating, the refrigerant states of the heat exchangers are different, the pressure drop of the heat exchangers and the heat exchange systems are different, and the fixed flow path of the heat exchanger cannot give consideration to refrigeration and heating and has high efficiency;
(2) when the load changes, the flow rate of the refrigerant is also greatly changed, the pressure drop of the heat exchanger is different from that of the heat exchange system, and the fixed flow path of the heat exchanger cannot give consideration to high load (high refrigerant flow rate) and low load (low refrigerant flow rate) and is efficient at the same time;
(3) the outdoor unit needs defrosting after frosting in winter, and when defrosting, heat is absorbed from the indoor, the indoor side becomes refrigeration, and the indoor temperature is rapidly reduced, so that discomfort is caused;
(4) for the condition of small load, the output of the unit capacity is overlarge, and the unit is easy to be frequently started and stopped;
(5) in the case of ultra-low temperature heating, the heat exchange temperature difference becomes small due to low outdoor temperature, and heat is difficult to be absorbed from outdoor air.
The air conditioner outdoor unit heat exchanger and the heat exchange mode are fixed to cause the problems of poor heat exchange effect, poor comfort and low energy efficiency in the prior art, and an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an air conditioner heat exchange structure, an air conditioner external unit, an air conditioner system and an air conditioner system control method, and aims to solve the problems of poor heat exchange effect, poor comfort and low energy efficiency caused by the fact that a heat exchanger of the air conditioner external unit and a heat exchange mode are fixed in the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides an air conditioner heat exchange structure, including: the heat exchanger comprises at least two heat exchange modules, wherein the series-parallel relation between the at least two heat exchange modules is adjustable, and the running state of each heat exchange module is adjustable; under the condition that the air conditioner heat exchange structure comprises two heat exchange modules, a first end of a first heat exchange module is connected to a first end of a second heat exchange module through a first valve assembly, and the first end of the first heat exchange module is also connected to a second end of the second heat exchange module through a first throttling device; the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second valve assembly, and the second end of the first heat exchange module is also connected to the first end of the second heat exchange module through a second throttling device; and the first valve component and the second valve component are respectively provided with a connecting port which is used as an external port of the air conditioner heat exchange structure.
Optionally, a first connection port is arranged on the first valve component, and the first connection port is connected to a third throttling device; the second valve assembly is provided with a second connecting port which is directly connected to the at least one compressor or is connected to the at least one compressor through a reversing device.
Optionally, the first valve assembly includes a first switch valve and a second switch valve connected in series, and the first end of the first heat exchange module is connected to the first end of the second heat exchange module sequentially through the first switch valve and the second switch valve; the second valve assembly comprises a third switch valve and a fourth switch valve which are connected in series, and the second end of the first heat exchange module is connected to the second end of the second heat exchange module sequentially through the third switch valve and the fourth switch valve.
Optionally, the connection point of the first switch valve and the second switch valve is used as the first connection port of the first valve component; the connection point of the third switch valve and the fourth switch valve is used as a second connection port of the second valve component.
Optionally, each heat exchange module includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel.
Optionally, the ratio of the heat exchange areas of any two heat exchange modules satisfies: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9.
An embodiment of the present invention provides an air conditioning system, including: the air conditioner comprises at least one air conditioner inner unit and at least one air conditioner outer unit, wherein the air conditioner outer unit or the air conditioner inner unit comprises the air conditioner heat exchange structure provided by the embodiment of the invention.
Optionally, when the air conditioning system includes two or more air conditioner external units, the two or more air conditioner external units are connected in parallel.
Optionally, when the air conditioning system includes two or more air conditioner internal units, the two or more air conditioner internal units are connected in parallel.
The embodiment of the invention provides a control method of an air conditioning system, wherein an external unit of the air conditioning system comprises the air conditioning heat exchange structure provided by the embodiment of the invention, and the control method comprises the following steps: detecting an operation mode of the air conditioning system; determining the connection relation and the operation state of the heat exchange module according to the operation mode; and controlling the valve assembly and the throttling device to execute corresponding operations according to the connection relation and the running state.
Optionally, the operation mode includes at least one of the following: the system comprises a high-efficiency refrigeration mode, a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a defrosting continuous heating mode, a self-cleaning mode, an ultra-low frequency mode and an ultra-low temperature heating mode.
Optionally, when the operation mode is the high-efficiency cooling mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and are used for heating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, wherein the opening degree of the first throttling device is larger than the preset opening degree, the second throttling device is closed, and the third throttling device is used for throttling.
Optionally, when the operation mode is the high-efficiency cooling mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and are used for heating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, enabling the opening degree of the second throttling device to be larger than the preset opening degree, and throttling by the third throttling device.
Optionally, when the operation mode is a high-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in parallel, and refrigerate; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve, the second switch valve, the third switch valve and the fourth switch valve to be opened, throttling and closing the first throttling device and the second throttling device, and throttling the third throttling device.
Optionally, when the operation mode is the low-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and refrigerate; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, wherein the opening degree of the first throttling device is larger than the preset opening degree, the second throttling device is closed, and the third throttling device is used for throttling.
Optionally, when the operation mode is the low-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and refrigerate; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, enabling the opening degree of the second throttling device to be larger than the preset opening degree, and throttling by the third throttling device.
Optionally, the defrosting continuous heating mode at least comprises a first continuous heating mode; when the operation mode is the first continuous heating mode, determining the connection relation and the operation state of the heat exchange module according to the operation mode, wherein the method comprises the following steps: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module is used for heating, and the second heat exchange module is used for refrigerating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, throttling the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
Optionally, the defrosting continuous heating mode further includes a second continuous heating mode; when the operation mode is a second continuous heating mode, determining the connection relation and the operation state of the heat exchange module according to the operation mode, including: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module carries out refrigeration, and the second heat exchange module carries out heating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and opening degree of the third throttling device to be larger than the preset opening degree.
Optionally, when the operation mode is the self-cleaning mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module is used for heating, and the second heat exchange module is used for refrigerating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and opening degree of the third throttling device to be larger than the preset opening degree.
Optionally, when the operation mode is the self-cleaning mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module carries out refrigeration, and the second heat exchange module carries out heating; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, throttling the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
Optionally, when the operation mode is the ultra-low frequency mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module heats or refrigerates, and the second heat exchange module stops running; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the third switch valve to be opened, the second switch valve and the fourth switch valve to be closed, the first throttling device and the second throttling device to be closed, and the third throttling device to throttle.
Optionally, when the operation mode is the ultra-low frequency mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module stops running, and the second heat exchange module heats or refrigerates; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switching valve and the third switching valve to be closed, the second switching valve and the fourth switching valve to be opened, the first throttling device and the second throttling device to be closed, and the third throttling device to be throttled.
Optionally, when the operation mode is the ultra-low temperature heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and refrigerate; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, the second switch valve and the third switch valve to be closed, the first throttling device to be closed, the second throttling device to be throttled, and the third throttling device to be throttled.
Optionally, when the operation mode is the ultra-low temperature heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode includes: the first heat exchange module and the second heat exchange module are connected in series and refrigerate; controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and throttling by the third throttling device.
Optionally, after detecting the operation mode of the air conditioning system, the method further includes: under the condition that the air conditioning system heats, detecting specified parameters of the air conditioning system, and judging whether the air conditioning system frosts according to the specified parameters; when the air-conditioning system is frosted, detecting the frosting condition, and controlling the air-conditioning system to intermittently operate a specified heating mode, the first continuous heating mode and the second continuous heating mode according to the frosting condition, or controlling the air-conditioning system to intermittently operate the first continuous heating mode and the second continuous heating mode; wherein the specified heating mode comprises at least one of: a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a heating mode in an ultra-low frequency mode, and an ultra-low temperature heating mode.
Embodiments of the present invention provide a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements an air conditioning system control method according to an embodiment of the present invention.
The embodiment of the invention provides an air conditioner outdoor unit, which comprises: the embodiment of the invention relates to an air conditioner heat exchange structure.
By applying the technical scheme of the invention, the at least two heat exchange modules are arranged on the air conditioner heat exchange structure, the connection relation of the at least two heat exchange modules can be changed by controlling the corresponding valve assemblies and throttling devices, and the refrigerating and heating state change of the heat exchange modules can be realized, so that the air conditioner heat exchange structure is applied to an air conditioner external unit or an air conditioner internal unit, the high-efficiency operation under different operation modes can be ensured, the comfort requirement of a user can be met, and the energy efficiency of the unit can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a heat exchange structure of an air conditioner according to a first embodiment of the present invention;
fig. 2A is a schematic structural diagram of an air conditioning system (single heat) according to a first embodiment of the present invention;
fig. 2B is a schematic structural diagram of an air conditioning system (heat pump) according to the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 4A is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 4B is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram six of an air conditioning system according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of an air conditioning system according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of an air conditioning system according to a second embodiment of the present invention;
fig. 8 is a flowchart of an air conditioning system control method according to a third embodiment of the present invention;
fig. 9 is a refrigerant flow path diagram of the high-efficiency refrigeration mode according to the third embodiment of the present invention;
fig. 10 is another refrigerant flow path diagram in the high-efficiency cooling mode according to the third embodiment of the present invention;
fig. 11 is a refrigerant flow path diagram in the high-load high-efficiency heating mode according to the third embodiment of the present invention;
fig. 12 is a refrigerant flow path diagram of a low-load high-efficiency heating mode according to a third embodiment of the present invention;
fig. 13 is another refrigerant flow path diagram of the low-load high-efficiency heating mode provided in the third embodiment of the present invention;
fig. 14 is a refrigerant flow path diagram of a defrosting continuous heating mode according to a third embodiment of the present invention;
fig. 15 is another refrigerant flow path diagram of a defrosting continuous heating mode according to a third embodiment of the present invention;
fig. 16 is a refrigerant flow path diagram of the self-cleaning mode according to the third embodiment of the present invention;
fig. 17 is another refrigerant flow path diagram of the self-cleaning mode according to the third embodiment of the present invention;
fig. 18 is a refrigerant flow path diagram in the ultra low frequency mode according to the third embodiment of the present invention;
fig. 19 is another refrigerant flow path diagram in the ultra low frequency mode according to the third embodiment of the present invention;
fig. 20 is a refrigerant flow path diagram of the ultra-low temperature heating mode according to the third embodiment of the present invention;
fig. 21 is another refrigerant flow path diagram in the ultra-low temperature heating mode according to the third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
This embodiment provides an air conditioner heat transfer structure, and this air conditioner heat transfer structure includes: the at least two heat exchange modules are adjustable in series-parallel relation, and the running state of each heat exchange module is adjustable. The air conditioner heat exchange structure can be arranged in an air conditioner external unit or an air conditioner internal unit, specifically, the connection relation (for example, series and/or parallel relation) and the operation state (for example, refrigeration, heating and stop operation) of the at least two heat exchange modules can be determined according to the operation mode of the air conditioning system, and the connection relation and the operation state are realized by controlling corresponding devices, so that the heat exchange effect is improved, the high efficiency of the operation mode is ensured, the requirement of user comfort is met, and meanwhile, the unit energy efficiency is improved. The heat exchange module is used for refrigerating and is used as an evaporator; the heat exchange module heats and serves as a condenser; the heat exchange module stops running, and the heat exchange module does not participate in heat exchange.
Referring to fig. 1, in the case that the air conditioner heat exchange structure includes two heat exchange modules, a first heat exchange module 11 and a second heat exchange module 12 are denoted. The first end of the first heat exchange module 11 is connected to the first end of the second heat exchange module 12 through the first valve assembly 20, and the first end of the first heat exchange module 11 is further connected to the second end of the second heat exchange module 12 through the first throttling device 23; the second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 through a second valve assembly 20', and the second end of the first heat exchange module 11 is also connected to the first end of the second heat exchange module 12 through a second throttling device 26; the first valve assembly 20 and the second valve assembly 20' are respectively provided with a connection port (as shown in ports a and B in fig. 1) as an external port of the air-conditioning heat exchange structure formed by the first heat exchange module and the second heat exchange module, and the external port can be connected to a throttling device or a compressor.
The valve assemblies (such as the first valve assembly 20 and the second valve assembly 20') in the heat exchange structure of the air conditioner of the embodiment are mainly used for controlling the communication of devices and the flow direction of the refrigerant so as to adjust the connection relationship and the operation state of the heat exchange module.
This embodiment sets up two at least heat exchange module at air conditioner heat transfer structure, through controlling corresponding valve member and throttling arrangement, can change the relation of connection of two at least heat exchange module of the aforesaid, and can realize the state change that heat exchange module refrigerates, heats to this air conditioner heat transfer structure is applied to the outer machine of air conditioner or the air conditioner indoor set, can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improves the unit efficiency simultaneously. The following detailed description will be made with reference to the accompanying drawings.
Specifically, the first valve assembly 20 is provided with a first connection port a, and the first connection port a is connected to the third throttling device, for example, if the air conditioner heat exchange structure is arranged in an air conditioner external unit, the first valve assembly 20 is connected to one end of the third throttling device, and the other end of the third throttling device is used for connecting an indoor heat exchanger. The third throttling device is a throttling device between the indoor heat exchange system and the outdoor heat exchange system, and can be arranged at the indoor side or the outdoor side.
The outdoor unit may include at least one compressor, and when the outdoor unit includes two or more compressors, the two or more compressors are connected in parallel. Of course, the two or more compressors may also be connected in series or a mixture of series and parallel depending on the particular design requirements. The second valve assembly 20' is provided with a second connection port B, which is connected directly to the at least one compressor or through a reversing device. When the air conditioner external unit comprises two or more compressors and the reversing device is arranged, the number of the reversing devices is at least one, namely, the two or more compressors can share one reversing device; the compressors can be in one-to-one correspondence with the reversing devices, namely each compressor is correspondingly connected with the own reversing device; and a part of compressors can share the reversing device according to specific requirements, and the other compressors are respectively and correspondingly connected with the reversing devices.
The connection between the heat exchange structure of the air conditioner and the third throttling device and the compressor is realized through the first connection port a of the first valve assembly 20 and the second connection port B of the second valve assembly 20'.
The valve assemblies (such as the first valve assembly 20 and the second valve assembly 20') involved in the heat exchange structure of the air conditioner of the present embodiment may adopt an on-off valve, a three-way valve, a four-way valve, or any combination thereof. For example, two on-off valves may be used to form a valve assembly, or a three-way valve may be used as a valve assembly.
In the embodiment of the present invention, the air conditioner external unit is described as an example including the air conditioner heat exchange structure, and in the case where the air conditioner internal unit includes the air conditioner heat exchange structure, the configuration may be performed with reference to the embodiment of the present invention, and detailed description of the specific connection is omitted.
The valve assembly formed by the switching valve is described below with reference to the accompanying drawings, and other forms of valve assemblies can be implemented by referring to the switching valve. In the lower drawing, the indoor side is an air conditioner indoor unit, and the outdoor side is an air conditioner outdoor unit.
The first valve assembly 20 comprises a first switch valve 21 and a second switch valve 22 which are connected in series, and the first end of the first heat exchange module 11 is connected to the first end of the second heat exchange module 12 through the first switch valve 21 and the second switch valve 22 in sequence; the second valve assembly 20' comprises a third on-off valve 24 and a fourth on-off valve 25 which are connected in series, and the second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 through the third on-off valve 24 and the fourth on-off valve 25 in sequence. The connection point of the first switch valve 21 and the second switch valve 22 is used as a first connection port of the first valve component 20; the connection point of the third switching valve 24 and the fourth switching valve 25 serves as a second connection port of the second valve assembly 20'.
Fig. 2A shows a single-heat air conditioning system (having only a heating function), fig. 2B shows a heat pump air conditioning system (having a heating mode and a cooling function), and as shown in fig. 2A and fig. 2B, a first end of the first heat exchange module 11 is connected to a first end of the second heat exchange module 12 sequentially through the first switch valve 21 and the second switch valve 22, and the first end of the first heat exchange module 11 is further connected to a second end of the second heat exchange module 12 through the first throttling device 23. The second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 sequentially through the third on-off valve 24 and the fourth on-off valve 25, and the second end of the first heat exchange module 11 is further connected to the first end of the second heat exchange module 12 through the second throttling device 26. The embodiment of the invention mainly takes a heat pump air conditioning system as an example for explanation, and a single-heat air conditioning system and a single-cold air conditioning system can be similarly arranged according to requirements.
The at least two heat exchange modules can share the first fan 27, so that the number of devices in the air conditioning system is reduced, and the cost and the occupied space are reduced. Of course, one fan may be used for each individual heat exchange module. The fan can be a centrifugal fan, an axial flow fan, a mixed flow fan or a cross flow fan, etc.
The connection point of the first switching valve 21 and the second switching valve 22 serves as a first connection port of the first valve assembly and is connected to one end of the third throttling means 31. The connection point of the third switching valve 24 and the fourth switching valve 25 serves as a second connection port of the second valve assembly, and is connected to the compressor 32 directly or through a reversing device 33. The indoor heat exchanger 41 is provided with a second fan 42 correspondingly.
As shown in fig. 3, each heat exchange module includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel. It should be noted that, in the same air conditioning system, the number of the heat exchangers included in different heat exchange modules may be the same or different. The heat exchange module comprises two or more heat exchangers, can improve refrigerating capacity or heating capacity, and can be applied to large-refrigerating-capacity units.
The heat exchange areas of the at least two heat exchange modules need to be kept within a reasonable proportioning range so as to realize the balance of cold and heat. Specifically, the ratio of the heat exchange areas of any two heat exchange modules satisfies the following conditions: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9. For example, in the case that the air conditioner heat exchange structure includes two heat exchange modules, the ratio of the heat exchange areas of the two heat exchange modules may be 1:1, or may be 3: 1. In practical application, a heat exchange module with a proper heat exchange area can be selected according to the requirement of an operation mode to execute corresponding functions.
As shown in fig. 4A and 4B, the outdoor unit may include at least one compressor 32, and when the outdoor unit includes two or more compressors, the two or more compressors are connected in parallel.
Specifically, for the air conditioning system shown in fig. 4A, the exhaust port of each compressor 32 is connected to the air conditioning indoor unit, and the suction port of each compressor 32 is connected to the connection point of the third switching valve 24 and the fourth switching valve 25. The air conditioning system shown in fig. 4A can perform heating and defrosting functions. By providing at least one compressor, a greater cold or heat requirement can be met.
As shown in fig. 4B, the air conditioning system may have both cooling and heating functions, in this case, the external air conditioning unit may include at least one compressor 32 and a reversing device 33, the at least one compressor may share the reversing device, specifically, an exhaust port of each compressor 32 is connected to a first port of the reversing device 33, an intake port of each compressor 32 is connected to a second port of the reversing device 33, a connection point of the third switching valve 24 and the fourth switching valve 25 is connected to a third port of the reversing device 33, and a fourth port of the reversing device 33 is connected to the internal air conditioning unit. The air conditioning system shown in fig. 4B can realize the cooling, heating and defrosting functions by reversing the reversing device. The reversing device 33 in the outdoor unit of the air conditioner may be a four-way valve, or may be replaced by a plurality of switching valves or three-way valves.
The number of the heat exchange modules in the air conditioner heat exchange structure is preferably 2 to 5. Based on the situation of the two heat exchange modules shown in fig. 1 to 4B, when more than two heat exchange modules are arranged, the number of valve assemblies and/or throttling devices needs to be increased and some connection relations need to be changed, as shown in fig. 5, the air conditioner heat exchange structure includes a structural schematic diagram of three heat exchange modules, the three heat exchange modules are respectively marked as a first heat exchange module 11, a second heat exchange module 12 and a third heat exchange module 13, a first end of the first heat exchange module 11 is connected to a first end of the second heat exchange module 12 sequentially through a fifth switch valve 201 and a sixth switch valve 202, and the first end of the first heat exchange module 11 is further connected to a second end of the second heat exchange module 12 through a fifth throttling device 212; the second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 sequentially through a seventh switching valve 203 and an eighth switching valve 204, and the second end of the first heat exchange module 11 is further connected between a ninth switching valve 205 and a tenth switching valve 206 through a fourth throttling device 211. The connection point of the fifth switching valve 201 and the sixth switching valve 202 is connected to the connection point of the ninth switching valve 205 and the tenth switching valve 206 sequentially through a thirteenth switching valve 209 and a fourteenth switching valve 210, and the connection point of the fifth switching valve 201 and the sixth switching valve 202 is further connected to the second end of the third heat exchange module 13 through a seventh throttling device 214. A connection point of the thirteenth switching valve 209 and the fourteenth switching valve 210 is connected to the third throttling device 31. The first end of the second heat exchange module 12 is connected to the first end of the third heat exchange module 13 sequentially through the ninth switch valve 205 and the tenth switch valve 206, the second end of the second heat exchange module 12 is connected to the first end of the third heat exchange module 13 sequentially through the sixth throttling device 213, and the second end of the second heat exchange module 12 is further connected to the second end of the third heat exchange module 13 sequentially through the eleventh switch valve 207 and the twelfth switch valve 208. The connection point of the seventh switching valve 203 and the eighth switching valve 204 and the connection point of the eleventh switching valve 207 and the twelfth switching valve 208 are both connected to the third port of the reversing device 33, and for a single heat system, the connection point of the seventh switching valve 203 and the eighth switching valve 204 and the connection point of the eleventh switching valve 207 and the twelfth switching valve 208 are directly connected to the suction port of the compressor. In fig. 5, the fifth and sixth switching valves 201 and 202, the seventh and eighth switching valves 203 and 204, the ninth and tenth switching valves 205 and 206, the eleventh and twelfth switching valves 207 and 208, and the thirteenth and fourteenth switching valves 209 and 210 are five valve assemblies, and illustratively, the individual valve assemblies may be replaced with one three-way valve.
The throttling device in the embodiment of the invention can be a throttling device with a flow regulating function, such as an electronic expansion valve, a thermal expansion valve, a throttle valve and the like, and can also be a capillary tube. The switch valve in the embodiment of the invention can be a valve element with a switch function, such as an electromagnetic valve, an electronic expansion valve and the like.
Example two
The present embodiment provides an air conditioning system including: at least one air conditioner internal unit and at least one air conditioner external unit, air conditioner external unit or air conditioner internal unit include the air conditioner heat transfer structure of the embodiment one above.
This embodiment sets up two at least heat exchange module at air conditioner heat transfer structure, through controlling corresponding valve member and throttling arrangement, can change the relation of connection of two at least heat exchange module of the aforesaid, and can realize the state change that heat exchange module refrigerates, heats to this air conditioner heat transfer structure is applied to the outer machine of air conditioner or the air conditioner indoor set, can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improves the unit efficiency simultaneously.
As shown in fig. 6, when the air conditioning system includes two or more air conditioner indoor units, the two or more air conditioner indoor units are connected in parallel. It can be understood that the two or more air conditioner indoor units form an indoor unit system connected in parallel, and can simultaneously perform air conditioning for multiple areas.
As shown in fig. 7, when the air conditioning system includes two or more outdoor air conditioning units, the two or more outdoor air conditioning units are connected in parallel. If the third throttling device is arranged outside the room, the two or more air conditioner external units can be respectively provided with the third throttling device, and can also share the third throttling device. By arranging two or more air conditioner external units, the requirement of large cooling capacity or heat can be met.
The air conditioning system can be a separated air conditioning system or a complete air conditioning system, and for the complete air conditioning system, an inner machine and an outer machine can share one fan so as to save cost and space.
EXAMPLE III
In a third preferred embodiment of the present invention, a method for controlling an air conditioning system is further provided, where an external unit of the air conditioning system includes the air conditioning heat exchange structure described in the above embodiment as an example, and in a case where an internal unit includes the air conditioning heat exchange structure described in the above embodiment, the control may be performed with reference to this embodiment, and details are not described again. Specifically, fig. 8 shows an alternative flowchart of the method, and as shown in fig. 8, the method includes the following steps S802 to S806:
s802: detecting an operation mode of an air conditioning system;
s804: determining the connection relation and the operation state of the heat exchange module according to the operation mode;
s806: and controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the operation state.
This embodiment sets up two at least heat exchange module at air conditioner heat transfer structure, through controlling corresponding valve member and throttling arrangement, can change the relation of connection of two at least heat exchange module of the aforesaid, and can realize the state change that heat exchange module refrigerates, heats to this air conditioner heat transfer structure is applied to the outer machine of air conditioner or the air conditioner indoor set, can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improves the unit efficiency simultaneously.
Wherein the operation mode at least comprises one of the following modes: the system comprises a high-efficiency refrigeration mode, a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a defrosting continuous heating mode, a self-cleaning mode, an ultra-low frequency mode and an ultra-low temperature heating mode.
The following description will be made with reference to the accompanying drawings, taking an example in which the air conditioning heat exchange structure includes two heat exchange modules. In the refrigerant flow path diagrams of fig. 9 to 21, the thick lines in the direction changing device 33 indicate that the corresponding two ports communicate with each other.
Fig. 9 shows a refrigerant flow path diagram in the high-efficiency cooling mode and operation states of the respective modules and components. As shown in fig. 9, when the operation mode is the high-efficiency cooling mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform heating; the specific control scheme comprises the following steps: the first switch valve 21 and the fourth switch valve 25 are controlled to be closed, the second switch valve 22 and the third switch valve 24 are controlled to be opened, the opening degree of the first throttling device 23 is larger than the preset opening degree, the second throttling device 26 is controlled to be closed, and the third throttling device 31 is controlled to throttle. Two heat exchange modules in the air conditioner outdoor unit are in a series connection mode and are in a heating state, so that the heat exchange effect is improved, the refrigeration efficiency of an air conditioning system is improved, and efficient refrigeration is realized.
The opening degree of the throttling device is larger than the preset opening degree, which indicates that the throttling device allows the refrigerant to flow through, does not throttle or has a weak throttling effect, for example, an electronic expansion valve can be opened to the maximum, or a short capillary tube is used. In fig. 9 to 21, "on" indicates a state where the throttle device normally circulates the refrigerant and is not throttled or is weakly throttled, "throttle" indicates that the throttle device normally throttles the refrigerant, and "off" indicates that the throttle device is not able to circulate the refrigerant.
Fig. 10 also shows an alternative refrigerant flow diagram for the high efficiency cooling mode and the operation of the various modules and components. As shown in fig. 10, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform heating; the specific control scheme comprises the following steps: and controlling the first switch valve 21 and the fourth switch valve 25 to be opened, the second switch valve 22 and the third switch valve 24 to be closed, the first throttling device 23 to be closed, the opening degree of the second throttling device 26 to be larger than the preset opening degree, and the third throttling device 31 to throttle. Fig. 10 is different from fig. 9 mainly in that the refrigerant flows through the first heat exchange module 11 and the second heat exchange module 12 in different orders.
Fig. 11 shows a refrigerant flow diagram in the high-load high-efficiency heating mode and operation states of the respective modules and components. As shown in fig. 11, when the operation mode is the high-load high-efficiency heating mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in parallel, and the first heat exchange module 11 and the second heat exchange module 12 perform cooling; the specific control scheme comprises the following steps: the first, second, third and fourth switching valves 21, 22, 24 and 25 are controlled to be opened, the first and second throttling devices 23 and 26 are controlled to be closed, and the third throttling device 31 is controlled to be throttled. Under high load (high refrigerant flow rate), two heat exchange modules in the air conditioner outdoor unit are in a parallel connection mode, the refrigerant flow is short and divided into two flow paths, and the two heat exchange modules are in a refrigeration state, so that the matching of the flow length, the flow number, the refrigerant cold and hot and the refrigerant flow rate is realized, the heat exchange effect is improved, and the heating efficiency of the air conditioning system is improved.
In addition to the high-load high-efficiency heating mode, a low-load high-efficiency heating mode is also included. Fig. 12 shows a refrigerant flow diagram in the low-load high-efficiency heating mode and the operation states of the respective modules and components. As shown in fig. 12, when the operation mode is the low-load high-efficiency heating mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform cooling; the specific control scheme comprises the following steps: the first switch valve 21 and the fourth switch valve 25 are controlled to be closed, the second switch valve 22 and the third switch valve 24 are controlled to be opened, the opening degree of the first throttling device 23 is larger than the preset opening degree, the second throttling device 26 is controlled to be closed, and the third throttling device 31 is controlled to throttle. Under low load (low refrigerant flow rate), two heat exchange modules in the air conditioner outdoor unit are in a series connection mode, the refrigerant flow path is few, the refrigerant flow path is long, and the two heat exchange modules are in a refrigeration state, so that the matching of the flow path length, the flow path number, the refrigerant cold and hot and the refrigerant flow rate is realized, the heat exchange effect is improved, and the heating efficiency of the air conditioning system is improved.
Meanwhile, fig. 13 also shows another alternative refrigerant flow path diagram of the low-load high-efficiency heating mode and the operation states of the modules and components. As shown in fig. 13, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform refrigeration; the specific control scheme comprises the following steps: and controlling the first switch valve 21 and the fourth switch valve 25 to be opened, the second switch valve 22 and the third switch valve 24 to be closed, the first throttling device 23 to be closed, the opening degree of the second throttling device 26 to be larger than the preset opening degree, and the third throttling device 31 to throttle. Fig. 13 is different from fig. 12 mainly in that the refrigerant flows through the first heat exchange module 11 and the second heat exchange module 12 in different orders.
Fig. 14 shows a refrigerant flow diagram in the defrosting continuous heating mode and operation states of the respective modules and components. The defrosting continuous heating mode at least comprises a first continuous heating mode and a second continuous heating mode, as shown in fig. 14, when the operation mode is the first continuous heating mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, the first heat exchange module 11 heats, and the second heat exchange module 12 cools; the specific control scheme comprises the following steps: and controlling the first switch valve 21 and the fourth switch valve 25 to be opened, the second switch valve 22 and the third switch valve 24 to be closed, the first throttling device 23 to be closed, the second throttling device 26 to be throttled, and the opening degree of the third throttling device 31 to be larger than the preset opening degree.
Fig. 15 shows another alternative refrigerant flow diagram and the operation of the modules and components in the defrosting continuous heating mode. As shown in fig. 15, when the operation mode is the second continuous heating mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, the first heat exchange module 11 performs cooling, and the second heat exchange module 12 performs heating; the specific control scheme comprises the following steps: the first switch valve 21 and the fourth switch valve 25 are controlled to be closed, the second switch valve 22 and the third switch valve 24 are controlled to be opened, the first throttling device 23 performs throttling, the second throttling device 26 is controlled to be closed, and the opening degree of the third throttling device 31 is larger than the preset opening degree.
Under the defrosting continuous heating mode, two heat exchange modules in an air conditioner outdoor unit are in a series connection state, a throttling device connected in series between the two heat exchange modules is in a throttling state, the other throttling device is in a closing state, the heat exchange module needing defrosting is in a heating state, the rest heat exchange modules are in a refrigerating state, and the heat exchange module in the refrigerating state and a compressor do work to provide heat for the indoor space. Through the cold and hot state's of heat exchange module transform, realize heat exchange module defrosting in turn, avoid defrosting to lead to indoor temperature to descend, guarantee user's travelling comfort.
Fig. 16 shows a refrigerant flow path diagram in the self-cleaning mode and operation states of the respective modules and components. As shown in fig. 16, when the operation mode is the self-cleaning mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, the first heat exchange module 11 performs heating, and the second heat exchange module 12 performs cooling; the specific control scheme comprises the following steps: the first switch valve 21 and the fourth switch valve 25 are controlled to be closed, the second switch valve 22 and the third switch valve 24 are controlled to be opened, the first throttling device 23 performs throttling, the second throttling device 26 is controlled to be closed, and the opening degree of the third throttling device 31 is larger than the preset opening degree.
Fig. 17 shows an alternative coolant flow diagram for the self-cleaning mode and the operation of the various modules and components. As shown in fig. 17, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, the first heat exchange module 11 performs cooling, and the second heat exchange module 12 performs heating; the specific control scheme comprises the following steps: and controlling the first switch valve 21 and the fourth switch valve 25 to be opened, the second switch valve 22 and the third switch valve 24 to be closed, the first throttling device 23 to be closed, the second throttling device 26 to be throttled, and the opening degree of the third throttling device 31 to be larger than the preset opening degree.
Under the self-cleaning mode, two heat exchange modules in the air conditioner outdoor unit are in a series connection state, a throttling device connected in series between the two heat exchange modules is in a throttling state, the other throttling device is in a closing state, the heat exchange module needing self-cleaning is in a refrigerating state, the rest heat exchange modules are in a heating state, the heat exchanger is cleaned by condensed water, and the heat exchange modules are self-cleaned in turn through the change of cold and hot states of the heat exchange modules.
Fig. 18 shows a refrigerant flow path diagram in the ultra low frequency mode and operation states of the respective modules and components. As shown in fig. 18, when the operation mode is the ultra low frequency mode, the first heat exchange module 11 performs heating (if the air conditioning system needs to perform heating, the first heat exchange module 11 performs cooling), and the second heat exchange module 12 stops operating; the specific control scheme comprises the following steps: the first on-off valve 21 and the third on-off valve 24 are controlled to be opened, the second on-off valve 22 and the fourth on-off valve 25 are controlled to be closed, the first throttling device 23 and the second throttling device 26 are controlled to be closed, and the third throttling device 31 is controlled to throttle.
Fig. 19 shows an alternative refrigerant flow diagram for the ultra low frequency mode and the operation of the various modules and components. As shown in fig. 19, the first heat exchange module 11 stops operating, and the second heat exchange module 12 performs heating (if the air conditioning system needs to perform heating, the second heat exchange module 12 performs cooling); the specific control scheme comprises the following steps: the first on-off valve 21 and the third on-off valve 24 are controlled to be closed, the second on-off valve 22 and the fourth on-off valve 25 are controlled to be opened, the first throttling device 23 and the second throttling device 26 are controlled to be closed, and the third throttling device 31 is controlled to be throttled.
The ultra-low frequency mode further reduces output by reducing the area of the heat exchanger, achieves matching with indoor required load, and reduces the startup and shutdown of the unit. At the moment, one part of the heat exchange modules participates in system heat exchange, the other part of the heat exchange modules is disconnected and does not participate in system heat exchange, and the mode can be adopted when the air conditioning system needs to refrigerate and heat.
Fig. 20 shows a refrigerant flow path diagram in the ultra-low-temperature heating mode and operation states of the respective modules and components. As shown in fig. 20, when the operation mode is the ultra-low temperature heating mode, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform cooling; the specific control scheme comprises the following steps: the first switching valve 21 and the fourth switching valve 25 are controlled to be opened, the second switching valve 22 and the third switching valve 24 are controlled to be closed, the first throttling device 23 is closed, the second throttling device 26 performs throttling, and the third throttling device 31 performs throttling.
Fig. 21 shows an alternative refrigerant flow diagram for the ultra-low-temperature heating mode and the operation states of the respective modules and components. As shown in fig. 21, the first heat exchange module 11 and the second heat exchange module 12 are connected in series, and the first heat exchange module 11 and the second heat exchange module 12 perform refrigeration; the specific control scheme comprises the following steps: the first on-off valve 21 and the fourth on-off valve 25 are controlled to be closed, the second on-off valve 22 and the third on-off valve 24 are controlled to be opened, the first throttling device 23 performs throttling, the second throttling device 26 is controlled to be closed, and the third throttling device 31 performs throttling. Fig. 21 is different from fig. 20 mainly in that the refrigerant flows through the first heat exchange module 11 and the second heat exchange module 12 in different orders.
When the outdoor temperature is extremely low, the heat exchange temperature difference becomes a key factor influencing the heat exchange effect, in order to increase the heat exchange temperature difference, the evaporation temperature of an external machine needs to be reduced, and at the moment, a secondary throttling mode is adopted, so that part of heat exchangers obtain lower evaporation temperature, and heat is obtained from a low-temperature environment.
The frosting phenomenon can appear when air conditioning system heats, to this, after detecting air conditioning system's operational mode, still include: under the condition that the air conditioning system heats, detecting specified parameters of the air conditioning system, and judging whether the air conditioning system frosts or not according to the detected specified parameters; when the air-conditioning system frosts, the frosting condition is detected, and the specified heating mode, the first continuous heating mode and the second continuous heating mode are controlled to be operated intermittently by the air-conditioning system according to the frosting condition, or the first continuous heating mode and the second continuous heating mode are controlled to be operated intermittently by the air-conditioning system; wherein the specified heating mode comprises at least one of: a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a heating mode in an ultra-low frequency mode, and an ultra-low temperature heating mode. The specified parameter for judging whether the air conditioning system is frosted may include at least one of: the refrigerant temperature, the system pressure, the ambient temperature and the ambient humidity, and of course, other parameters may be used to determine frosting. Under the condition of less frosting, the air conditioning system can be continuously controlled to heat, when the frosting reaches a certain degree, the defrosting is carried out (namely, a defrosting continuous heating mode is entered), and after the defrosting is finished, the corresponding heating mode is timely switched back to carry out heating. If the frosting is serious, the air conditioning system can intermittently operate the first continuous heating mode and the second continuous heating mode within a period of time. The intermittent operation of the modes is controlled under the frosting condition, so that continuous heating can be realized, and the indoor heating effect is ensured.
For the condition that the air conditioner heat exchange structure comprises three heat exchange modules or more heat exchange modules, the control of various operation modes can be realized aiming at the specific structure.
In the existing air conditioning system, a heating mode and a cooling mode share a system branch, a proper flow path for cooling is too many branches for heating, the flow rate of a refrigerant is too low, and the heating is not efficient, namely, the flow length and the number of the flow paths have obvious influence on the heat exchange effect. According to the embodiment of the invention, through system conversion, the connection relation and the operation state of the heat exchange modules in the air exchange heat exchange structure are adjusted, and more appropriate matching of the flow length, the flow number, the cold and hot states of the refrigerant and the flow speed state of the heat exchanger is realized, so that the high efficiency of system operation is ensured.
In the refrigerant flow path diagrams shown in fig. 9 to 21, the section of the flow path from the compressor discharge port to the first throttling device in the throttling state is a high-pressure refrigerant flow path, and the section of the flow path from the first throttling device in the throttling state to the compressor suction port is a low-pressure refrigerant flow path, in accordance with the refrigerant flow direction.
For example, in fig. 9, the third throttling device 31 is in a throttling state and has a throttling function, a high-temperature and high-pressure gaseous refrigerant is discharged from an exhaust port of the compressor 32, enters the first heat exchange module 11 through the reversing device 33 and the third on-off valve 24 to be condensed and radiated (i.e., the first heat exchange module 11 is in a heating state and serves as a condenser), the condensed refrigerant enters the second heat exchange module 12 through the first throttling device 23 to be condensed again (i.e., the second heat exchange module 12 is in a heating state and serves as a condenser), and then flows to the third throttling device 31 through the second on-off valve 22, the refrigerant is throttled by the third throttling device 31 and enters the indoor heat exchanger 41 (serving as an evaporator), and then returns to an air suction port of the compressor 32 through the reversing device 33, thereby completing a refrigeration cycle. In the refrigerating cycle, the section of the flow path from the discharge port of the compressor 32 to the third throttling device 31 is a high-pressure refrigerant flow path, and the section of the flow path from the third throttling device 31 to the suction port of the compressor 32 is a low-pressure refrigerant flow path.
Example four
Based on the air conditioning system control method provided in the third embodiment, there is also provided in a fourth preferred embodiment of the present invention a storage medium containing computer-executable instructions for performing the air conditioning system control method as described above when executed by a computer processor.
This embodiment sets up two at least heat exchange module at air conditioner heat transfer structure, through controlling corresponding valve member and throttling arrangement, can change the relation of connection of two at least heat exchange module of the aforesaid, and can realize the state change that heat exchange module refrigerates, heats to this air conditioner heat transfer structure is applied to the outer machine of air conditioner or the air conditioner indoor set, can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improves the unit efficiency simultaneously.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (27)

1. An air conditioner heat exchange structure, comprising: the heat exchanger comprises at least two heat exchange modules, wherein the series-parallel relation between the at least two heat exchange modules is adjustable, and the running state of each heat exchange module is adjustable;
under the condition that the air conditioner heat exchange structure comprises two heat exchange modules, a first end of a first heat exchange module is connected to a first end of a second heat exchange module through a first valve assembly, and the first end of the first heat exchange module is also connected to a second end of the second heat exchange module through a first throttling device;
the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second valve assembly, and the second end of the first heat exchange module is also connected to the first end of the second heat exchange module through a second throttling device;
and the first valve component and the second valve component are respectively provided with a connecting port which is used as an external port of the air conditioner heat exchange structure.
2. The heat exchange structure of an air conditioner according to claim 1, wherein the first valve component is provided with a first connection port, and the first connection port is connected to a third throttling device;
the second valve assembly is provided with a second connecting port which is directly connected to the at least one compressor or is connected to the at least one compressor through a reversing device.
3. The heat exchange structure of an air conditioner according to claim 1 or 2, wherein the first valve assembly comprises a first switch valve and a second switch valve which are connected in series, and the first end of the first heat exchange module is connected to the first end of the second heat exchange module sequentially through the first switch valve and the second switch valve;
the second valve assembly comprises a third switch valve and a fourth switch valve which are connected in series, and the second end of the first heat exchange module is connected to the second end of the second heat exchange module sequentially through the third switch valve and the fourth switch valve.
4. The heat exchange structure of an air conditioner according to claim 3, wherein the connection point of the first switch valve and the second switch valve is used as the first connection port of the first valve component;
the connection point of the third switch valve and the fourth switch valve is used as a second connection port of the second valve component.
5. The heat exchange structure of an air conditioner according to claim 1, wherein each of the heat exchange modules includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel.
6. The heat exchange structure of an air conditioner as claimed in claim 1, wherein the ratio of the heat exchange areas of any two heat exchange modules satisfies: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9.
7. An air conditioning system, comprising: at least one air conditioner indoor unit and at least one air conditioner outdoor unit, wherein the air conditioner outdoor unit or the air conditioner indoor unit comprises the air conditioner heat exchange structure as claimed in any one of claims 1 to 6.
8. The system of claim 7, wherein when the system includes two or more outdoor units, the two or more outdoor units are connected in parallel.
9. The air conditioning system of claim 7, wherein when the air conditioning system includes two or more air conditioning indoor units, the two or more air conditioning indoor units are connected in parallel.
10. A control method of an air conditioning system, an outdoor unit of the air conditioning system including the heat exchange structure of an air conditioner according to any one of claims 1 to 6, comprising:
detecting an operation mode of the air conditioning system;
determining the connection relation and the operation state of the heat exchange module according to the operation mode;
and controlling the valve assembly and the throttling device to execute corresponding operations according to the connection relation and the running state.
11. The method of claim 10, wherein the operating mode includes at least one of: the system comprises a high-efficiency refrigeration mode, a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a defrosting continuous heating mode, a self-cleaning mode, an ultra-low frequency mode and an ultra-low temperature heating mode.
12. The method of claim 11, wherein determining the connection relationship and the operation state of the heat exchange module according to the operation mode when the operation mode is the high-efficiency cooling mode comprises: the first heat exchange module and the second heat exchange module are connected in series and are used for heating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, wherein the opening degree of the first throttling device is larger than the preset opening degree, the second throttling device is closed, and the third throttling device is used for throttling.
13. The method of claim 11, wherein determining the connection relationship and the operation state of the heat exchange module according to the operation mode when the operation mode is the high-efficiency cooling mode comprises: the first heat exchange module and the second heat exchange module are connected in series and are used for heating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, enabling the opening degree of the second throttling device to be larger than the preset opening degree, and throttling by the third throttling device.
14. The method of claim 11, wherein when the operation mode is a high-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module and the second heat exchange module are connected in parallel, and refrigerate;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve, the second switch valve, the third switch valve and the fourth switch valve to be opened, closing the first throttling device and the second throttling device, and throttling by the third throttling device.
15. The method of claim 11, wherein when the operation mode is a low-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module and the second heat exchange module are connected in series and refrigerate;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, wherein the opening degree of the first throttling device is larger than the preset opening degree, the second throttling device is closed, and the third throttling device is used for throttling.
16. The method of claim 11, wherein when the operation mode is a low-load high-efficiency heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module and the second heat exchange module are connected in series and refrigerate;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, enabling the opening degree of the second throttling device to be larger than the preset opening degree, and throttling by the third throttling device.
17. The method of claim 11, wherein the defrosting continuous heating mode comprises at least a first continuous heating mode; when the operation mode is the first continuous heating mode, determining the connection relation and the operation state of the heat exchange module according to the operation mode, wherein the method comprises the following steps: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module is used for heating, and the second heat exchange module is used for refrigerating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, throttling the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
18. The method of claim 17, wherein the defrosting continuous heating mode further comprises a second continuous heating mode; when the operation mode is a second continuous heating mode, determining the connection relation and the operation state of the heat exchange module according to the operation mode, including: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module carries out refrigeration, and the second heat exchange module carries out heating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and opening degree of the third throttling device to be larger than the preset opening degree.
19. The method of claim 11, wherein determining the connection relationship and the operation status of the heat exchange module according to the operation mode when the operation mode is the self-cleaning mode comprises: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module is used for heating, and the second heat exchange module is used for refrigerating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and opening degree of the third throttling device to be larger than the preset opening degree.
20. The method of claim 11, wherein determining the connection relationship and the operation status of the heat exchange module according to the operation mode when the operation mode is the self-cleaning mode comprises: the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module carries out refrigeration, and the second heat exchange module carries out heating;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, closing the second switch valve and the third switch valve, closing the first throttling device, throttling the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
21. The method of claim 11, wherein when the operation mode is the ultra low frequency mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module heats or refrigerates, and the second heat exchange module stops running;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the third switch valve to be opened, the second switch valve and the fourth switch valve to be closed, the first throttling device and the second throttling device to be closed, and the third throttling device to throttle.
22. The method of claim 11, wherein when the operation mode is the ultra low frequency mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module stops running, and the second heat exchange module heats or refrigerates;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switching valve and the third switching valve to be closed, the second switching valve and the fourth switching valve to be opened, the first throttling device and the second throttling device to be closed, and the third throttling device to be throttled.
23. The method of claim 11, wherein when the operation mode is the ultra-low-temperature heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module and the second heat exchange module are connected in series and refrigerate;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be opened, the second switch valve and the third switch valve to be closed, the first throttling device to be closed, the second throttling device to be throttled, and the third throttling device to be throttled.
24. The method of claim 11, wherein when the operation mode is the ultra-low-temperature heating mode, determining the connection relationship and the operation state of the heat exchange module according to the operation mode comprises: the first heat exchange module and the second heat exchange module are connected in series and refrigerate;
controlling the valve assembly and the throttling device to perform corresponding operations according to the connection relation and the running state, wherein the operations comprise: and controlling the first switch valve and the fourth switch valve to be closed, the second switch valve and the third switch valve to be opened, throttling by the first throttling device, closing by the second throttling device, and throttling by the third throttling device.
25. The method of claim 18, after detecting the operating mode of the air conditioning system, further comprising:
under the condition that the air conditioning system heats, detecting specified parameters of the air conditioning system, and judging whether the air conditioning system frosts according to the specified parameters;
when the air-conditioning system is frosted, detecting the frosting condition, and controlling the air-conditioning system to intermittently operate a specified heating mode, the first continuous heating mode and the second continuous heating mode according to the frosting condition, or controlling the air-conditioning system to intermittently operate the first continuous heating mode and the second continuous heating mode; wherein the specified heating mode comprises at least one of: a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a heating mode in an ultra-low frequency mode, and an ultra-low temperature heating mode.
26. A computer-readable storage medium on which a computer program is stored, wherein the program, when executed by a processor, implements the air conditioning system control method according to any one of claims 10 to 25.
27. An outdoor unit for an air conditioner, comprising: the heat exchange structure of an air conditioner according to any one of claims 1 to 6.
CN202110321124.XA 2021-03-25 2021-03-25 Air conditioner heat exchange structure, air conditioner external unit, air conditioner system and air conditioner system control method Pending CN112902473A (en)

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