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CN116906985A - Control method of air conditioner - Google Patents

Control method of air conditioner Download PDF

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Publication number
CN116906985A
CN116906985A CN202310963928.9A CN202310963928A CN116906985A CN 116906985 A CN116906985 A CN 116906985A CN 202310963928 A CN202310963928 A CN 202310963928A CN 116906985 A CN116906985 A CN 116906985A
Authority
CN
China
Prior art keywords
heat exchange
pipe
valve
heat exchanger
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202310963928.9A
Other languages
Chinese (zh)
Other versions
CN116906985B (en
Inventor
罗荣邦
崔俊
苏萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Smart Technology R&D Co Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202310963928.9A priority Critical patent/CN116906985B/en
Publication of CN116906985A publication Critical patent/CN116906985A/en
Application granted granted Critical
Publication of CN116906985B publication Critical patent/CN116906985B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24F11/62—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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

本发明涉及空调技术领域，具体涉及一种空调器的控制方法。本申请旨在解决现有分流方式存在的分流系统复杂、结构空间大、不利于装配和应用的问题。为此目的，本申请的室内换热器包括内排换热管路、外排换热管路和连通二者的连通管路，室外换热器包括多个换热管段和可以切换换热管段之间连通形式的通断阀组，控制方法包括：获取空调器的运行模式；基于运行模式，确定室外换热器和室内换热器的连通形式；基于连通形式，控制空调器工作。本申请可以根据不同应用场景切换室内换热器和室外换热器的分流形式，实现分流的自适应耦合变化，提高空调器的换热效率和效果。并且，上述技术方案结构简单，不额外占用空间，利于装配和应用。The invention relates to the technical field of air conditioning, and in particular to a control method for an air conditioner. This application aims to solve the problems existing in the current diverting method, such as the complicated diverting system, large structural space, and unfavorable assembly and application. For this purpose, the indoor heat exchanger of this application includes an inner heat exchange pipeline, an outer heat exchange pipeline and a connecting pipeline connecting the two. The outdoor heat exchanger includes multiple heat exchange pipe sections and switchable heat exchange pipe sections. The control method includes: obtaining the operation mode of the air conditioner; determining the connection mode between the outdoor heat exchanger and the indoor heat exchanger based on the operation mode; and controlling the operation of the air conditioner based on the connection mode. This application can switch the shunt form of the indoor heat exchanger and the outdoor heat exchanger according to different application scenarios, realize adaptive coupling changes of the shunt, and improve the heat exchange efficiency and effect of the air conditioner. Moreover, the above technical solution has a simple structure, does not occupy additional space, and is convenient for assembly and application.

Description

Control method of air conditioner
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method of an air conditioner.
Background
The development of the home air conditioner has entered the era of high energy efficiency, miniaturization, low resource consumption, and is required to improve the efficiency of the heat exchanger and save resources. When the air conditioner is used as a condenser and an evaporator, the split-flow type requirements are different, the pressure is low, the flow speed is low, more flow paths are needed, the temperature and the pressure of the condenser are high, and the large heat exchange temperature difference and the large supercooling degree are needed.
The existing heat exchanger usually adopts a shunt pipe or a shunt to carry out shunt design if the existing heat exchanger needs to shunt, but the conventional shunt mode has a plurality of defects, such as complex shunt system, large structural space, inconvenience for assembly and application, and the like. The flow of a shunting scheme is fixed, and self-adaptive coupling change cannot be carried out according to the load and the actual use condition.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
In order to solve at least one of the problems of the prior art, namely, to solve the problems of complicated split system, large structural space, and inconvenience for assembly and application of the existing split system, the present application provides a control method of an air conditioner, the air conditioner comprising a compressor, an outdoor heat exchanger, a throttling element and an indoor heat exchanger,
The indoor heat exchanger comprises an inner heat exchange pipeline and an outer heat exchange pipeline which are independent of each other, a first end of the inner heat exchange pipeline and a first end of the outer heat exchange pipeline are respectively communicated with the throttling element through a first liquid pipe and a second liquid pipe, a second end of the inner heat exchange pipeline and a second end of the outer heat exchange pipeline are respectively communicated with the compressor through a first air pipe and a second air pipe, a communication pipeline is further arranged between the first end of the inner heat exchange pipeline and the second end of the outer heat exchange pipeline, the communication pipeline can be selectively communicated or blocked, the first liquid pipe can be selectively communicated or blocked, the second air pipe can be selectively communicated or blocked, the first air pipe and the second air pipe can be selectively communicated or blocked,
the outdoor heat exchanger comprises a plurality of heat exchange tube sections, an on-off valve group is further arranged in the outdoor heat exchanger, the on-off valve group comprises a plurality of on-off valves, and the on-off valve group is arranged to be capable of controlling the communication form among the plurality of heat exchange tube sections;
the control method comprises the following steps:
acquiring an operation mode of the air conditioner;
determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode;
And controlling the air conditioner to work based on the communication form.
In the preferred technical scheme of the control method of the air conditioner, the outdoor heat exchanger comprises a first heat exchange tube section, a second heat exchange tube section and a third heat exchange tube section which are sequentially connected, the outdoor heat exchanger further comprises a first branch tube, a second branch tube and a third branch tube, a first end of the first branch tube is communicated with a refrigerant tube between the compressor and the first heat exchange tube section, a second end of the first branch tube is communicated with a refrigerant tube between the second heat exchange tube section and the third heat exchange tube section, a first end of the second branch tube is communicated with the third branch tube, a second end of the second branch tube is communicated with one end, close to the second heat exchange tube section, of the third branch tube is communicated with a refrigerant tube between the first heat exchange tube section and the second heat exchange tube section, a second end of the third branch tube is communicated with a refrigerant tube between the third heat exchange tube section and the throttling element,
the on-off valve group comprises a first on-off valve, a second on-off valve, a third on-off valve and a fourth on-off valve, wherein the first on-off valve is arranged on the first branch pipe, the second on-off valve is arranged on a refrigerant pipe between the second heat exchange pipe section and the third heat exchange pipe section and is positioned between the second end of the first branch pipe and the third heat exchange pipe section, the third on-off valve is arranged on the second branch pipe, and the fourth on-off valve is arranged on the third branch pipe and is positioned between the first end of the second branch pipe and the second end of the third branch pipe.
In a preferred embodiment of the above-described control method for an air conditioner, the step of determining a communication form between the outdoor heat exchanger and the indoor heat exchanger based on the operation mode further includes:
when the operation mode is a refrigeration mode, acquiring outdoor environment temperature;
and determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor environment temperature.
In a preferred embodiment of the above-described control method for an air conditioner, the step of determining a communication form between the outdoor heat exchanger and the indoor heat exchanger based on the outdoor ambient temperature further includes:
when the outdoor environment temperature is smaller than a first preset temperature threshold, the first on-off valve, the third on-off valve and the fourth on-off valve are closed, the second on-off valve is opened, and the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
In a preferred embodiment of the above-described control method for an air conditioner, the step of determining a communication form between the outdoor heat exchanger and the indoor heat exchanger based on the outdoor ambient temperature further includes:
When the outdoor environment temperature is greater than or equal to the first preset temperature threshold, the first on-off valve and the third on-off valve are opened, the second on-off valve and the fourth on-off valve are closed, and the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
In a preferred embodiment of the above-described control method for an air conditioner, the step of determining a communication form between the outdoor heat exchanger and the indoor heat exchanger based on the operation mode further includes:
when the operation mode is a heating mode, the first on-off valve, the second on-off valve and the fourth on-off valve are opened, the third on-off valve is closed, and the communication pipeline is communicated, the first liquid pipe is blocked, the second air pipe is blocked, and the first air pipe and the second air pipe are communicated.
In the preferred technical scheme of the control method of the air conditioner, the second air pipe is provided with a three-way control valve, and a first port, a second port and a third port of the three-way control valve are respectively communicated with the second end of the heat exchange pipeline, the compressor and the first air pipe.
In the preferable technical scheme of the control method of the air conditioner, the control of the communication between the first air pipe and the second air pipe is realized by the following steps:
and controlling the second port to be communicated with the third port.
In a preferred embodiment of the control method of an air conditioner, the communication pipe is provided with a first check valve, and the first check valve is configured to be turned on when the refrigerant flows from the first end of the inner heat exchange pipe to the second end of the outer heat exchange pipe.
In a preferred embodiment of the control method of an air conditioner, the first liquid pipe is provided with a second check valve, and the second check valve is configured to be turned on when the refrigerant flows from the throttling element to the first end of the inner heat exchange pipeline.
According to the technical scheme, the communication modes of the indoor heat exchanger and the outdoor heat exchanger are determined based on the operation mode, so that the split modes of the indoor heat exchanger and the outdoor heat exchanger can be switched according to different application scenes, the split self-adaptive coupling change is realized, and the heat exchange efficiency and effect of the air conditioner are improved. In addition, the technical scheme has simple structure, does not occupy extra space, and is beneficial to assembly and application.
Drawings
The present application is described below with reference to the accompanying drawings. In the accompanying drawings:
fig. 1 is a system diagram of an air conditioner in a cooling mode according to a first embodiment of the present application;
fig. 2 is a system diagram of an air conditioner in a heating mode according to a first embodiment of the present application;
fig. 3 is a flowchart of a control method of an air conditioner according to a first embodiment of the present application;
FIG. 4 is a system diagram of an air conditioner in a compressor operation dual stage mode according to a second embodiment of the present application;
FIG. 5 is a system diagram of an air conditioner according to a second embodiment of the present application in a double cylinder mode of operation of a compressor;
fig. 6 is a flowchart of a control method of an air conditioner according to a second embodiment of the present application.
List of reference numerals
1. A compressor; 11. a first compression cylinder; 12. a second compression cylinder; 13. a first port; 14. a second port; 15. a third port; 16. a fourth port; 17. an exhaust port; 2. a second four-way valve; 3. an outdoor heat exchanger; 31. a first heat exchange tube section; 32. a second heat exchange tube section; 33. a third heat exchange tube section; 34. a first branch pipe; 35. a second branch pipe; 36. a third branch pipe; 4. a throttle element; 5. an indoor heat exchanger; 51. an inner heat exchange pipeline; 511. a first inner row heat exchange tube section; 512. a second inner row heat exchange tube section; 52. an outer heat exchange pipeline; 521. a first externally arranged heat exchange tube section; 522. a second externally arranged heat exchange tube section; 53. a communication pipeline; 61. a first liquid pipe; 62. a second liquid pipe; 63. a first air tube; 64. a second air pipe; 71. a first one-way valve; 72. a second one-way valve; 73. a three-way control valve; 81. a first on-off valve; 82. a second on-off valve; 83. a third cut-off valve; 84. a fourth shut-off valve; 9. a first four-way valve; 10. a gas-liquid separator.
Detailed Description
For example, although the following details of the method of the present application are described below, those skilled in the art may combine, split and exchange the following steps without departing from the basic principle of the present application, and the technical solution thus modified does not change the basic concept of the present application, and therefore falls within the scope of the present application. For example, although the following details of the method of the present application are described below, those skilled in the art may combine, split and exchange the following steps without departing from the basic principle of the present application, and the technical solution thus modified does not change the basic concept of the present application, and therefore falls within the scope of the present application.
It should be noted that, in the description of the present application, terms such as "upper", "lower", and the like, refer to directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," second, "" third, "" fourth, "and fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means at least two.
Furthermore, it should be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.
The air conditioner of the present application will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the air conditioner of the present application includes a compressor 1, a second four-way valve 2, an outdoor heat exchanger 3, a throttling element 4, and an indoor heat exchanger 5. Wherein, the compressor 1, the second four-way valve 2, the outdoor heat exchanger 3, the throttling element 4 and the indoor heat exchanger 5 are sequentially communicated through a refrigerant pipe to form refrigerant circulation. Preferably, the throttling element 4 is an electronic expansion valve. The connection mode and the working principle of the air conditioner are conventional technical means in the field, and the application is not repeated.
In particular, the outdoor heat exchanger 3 of the present application includes a plurality of heat exchange tube sections, and an on-off valve group including a plurality of on-off valves is further provided in the outdoor heat exchanger 3, the on-off valve group being provided so as to be capable of controlling a communication form between the plurality of heat exchange tube sections. Specifically, the outdoor heat exchanger 3 includes a first heat exchange tube segment 31, a second heat exchange tube segment 32, and a third heat exchange tube segment 33, which are connected in order. The first heat exchange tube section 31 is located in the middle of the outdoor heat exchanger 3, the second heat exchange tube section 32 is located above the first heat exchange tube section 31, and the third heat exchange tube section 33 is located below the first heat exchange tube section 31. One end of the first heat exchange tube section 31 is communicated with the exhaust port 17 of the compressor 1 through a refrigerant tube, the other end of the first heat exchange tube section 31 is communicated with one end of the second heat exchange tube section 32 through a refrigerant tube, the other end of the second heat exchange tube section 32 is communicated with one end of the third heat exchange tube section 33 through a refrigerant tube, and the other end of the third heat exchange tube section 33 is communicated with the throttling element 4 through a refrigerant tube.
The outdoor heat exchanger 3 further includes a first branch pipe 34, a second branch pipe 35, and a third branch pipe 36. Wherein, the first end of the first branch pipe 34 is communicated with the refrigerant pipe between the compressor 1 and the first heat exchange pipe section 31, and the second end of the first branch pipe 34 is communicated with the refrigerant pipe between the second heat exchange pipe section 32 and the third heat exchange pipe section 33. The first end of the second branch pipe 35 is connected to the third branch pipe 36, the second end of the second branch pipe 35 is connected to an end of the third heat exchange tube section 33 near the second heat exchange tube section 32 (i.e., an end of the third heat exchange tube section 33 connected to the second heat exchange tube section 32), the first end of the third branch pipe 36 is connected to a refrigerant tube between the first heat exchange tube section 31 and the second heat exchange tube section 32, and the second end of the third branch pipe 36 is connected to a refrigerant tube between the third heat exchange tube section 33 and the throttling element 4.
The on-off valve group includes a first on-off valve 81, a second on-off valve 82, a third on-off valve 83, and a fourth on-off valve 84. The first on-off valve 81, the second on-off valve 82, the third on-off valve 83, and the fourth on-off valve 84 are preferably solenoid valves. The first on-off valve 81 is disposed on the first branch pipe 34, the second on-off valve 82 is disposed on the refrigerant pipe between the second heat exchange pipe section 32 and the third heat exchange pipe section 33 and between the second end of the first branch pipe 34 and the third heat exchange pipe section 33, the third on-off valve 83 is disposed on the second branch pipe 35, and the fourth on-off valve 84 is disposed on the third branch pipe 36 and between the first end of the second branch pipe 35 and the second end of the third branch pipe 36.
In the above arrangement, by controlling the opening and closing of the first on-off valve 81, the second on-off valve 82, the third on-off valve 83, and the fourth on-off valve 84, different communication forms of the first heat exchange tube section 31, the second heat exchange tube section 32, and the third heat exchange tube section 33 can be realized, thereby realizing different heat exchange effects of the outdoor heat exchanger 3.
With continued reference to fig. 1 and 2, the indoor heat exchanger 5 preferably includes an inner heat exchange line 51 and an outer heat exchange line 52 that are independent of each other, the first ends of the inner heat exchange line 51 and the outer heat exchange line 52 being in communication with the throttling element 4 through a first liquid pipe 61 and a second liquid pipe 62, respectively, and the second ends of the inner heat exchange line 51 and the outer heat exchange line 52 being in communication with the second four-way valve 2 through a first gas pipe 63 and a second gas pipe 64, respectively. Preferably, a communication pipeline 53 is further arranged between the first end of the inner heat exchange pipeline 51 and the second end of the outer heat exchange pipeline 52, the communication pipeline 53 can be selectively communicated or blocked, and more preferably, a first check valve 71 is arranged on the communication pipeline 53, and the first check valve 71 is arranged to be communicated when the refrigerant flows from the first end of the inner heat exchange pipeline 51 to the second end of the outer heat exchange pipeline 52. Preferably, the first liquid pipe 61 is selectively communicated or blocked, and more preferably, the first liquid pipe 61 is provided with a second check valve 72, and the second check valve 72 is arranged to be communicated when the refrigerant flows from the throttling element 4 to the first end of the inward heat exchange line 51. Preferably, the second air pipe 64 is selectively communicable or blocked, and the first air pipe 63 is selectively communicable or blocked with the second air pipe 64. More preferably, the second air pipe 64 is provided with a three-way control valve 73, and the first port 13 (left end shown in fig. 1), the second port 14 (right end shown in fig. 1) and the third port 15 (upper end shown in fig. 1) of the three-way control valve 73 are respectively communicated with the second end of the heat exchange tube 52, the second four-way valve 2 and the first air pipe 63.
Referring to fig. 1 and 2, in the present application, the heat exchange tube 51 includes a first heat exchange tube section 511 and a second heat exchange tube section 512, a first end of the first heat exchange tube section 511 and a first end of the second heat exchange tube section 512 are simultaneously communicated with the first liquid tube 61, and a second end of the first heat exchange tube section 511 and a second end of the second heat exchange tube section 512 are simultaneously communicated with the first gas tube 63. The outer heat exchange line 52 includes a first outer heat exchange tube segment 521 and a second outer heat exchange tube segment 522, with the first end of the first outer heat exchange tube segment 521 and the first end of the second outer heat exchange tube segment 522 simultaneously communicating with the second liquid tube 62, and the second end of the first outer heat exchange tube segment 521 and the second end of the second outer heat exchange tube segment 522 simultaneously communicating with the second air tube 64. The communication pipe 53 is provided with two communication pipes, one of which is communicated between the first end of the first inner heat exchange pipe section 511 and the second end of the first outer heat exchange pipe section 521, and the other of which is communicated between the first end of the second inner heat exchange pipe section 512 and the second end of the second outer heat exchange pipe section 522.
Next, a second embodiment of the air conditioner of the present application will be described with reference to fig. 4 and 5.
As shown in fig. 4 and 5, in another preferred embodiment, the compressor 1 is a variable capacity compressor 1, and the variable capacity compressor 1 has two compression cylinders, on the basis of the first embodiment. Specifically, the first compression cylinder 11 and the second compression cylinder 12 are arranged in the variable-volume compressor 1, four ports and one exhaust port 17 are formed in a shell of the compressor 1, wherein the first port 13 is communicated with an air inlet of the first compression cylinder 11, the second port 14 is communicated with an air outlet of the first compression cylinder 11, the third port 15 is communicated with an air inlet of the second compression cylinder 12, an air outlet of the second compression cylinder 12 is communicated with the exhaust port 17, and the fourth port 16 is communicated with the exhaust port 17 through the inside of the shell.
The positive displacement compressor 1 is further provided with a first four-way valve 9, the first four-way valve 9 having four ports a, b, c, d, wherein a first port a communicates with the fourth port 16, a second port b communicates with the second port 14, and a third port c communicates with the third port 15. The movable part is arranged inside the first four-way valve 9, and when the first four-way valve 9 is electrified or powered off, the movable part moves in the first four-way valve 9, so that communication and blocking among different interfaces are realized.
The second four-way valve 2 is communicated with two gas-liquid separators 10, and the outlets of the two gas-liquid separators 10 are respectively communicated with two compression cylinders of the variable-volume compressor 1. Wherein, the outlet of one gas-liquid separator 10 is directly communicated with the first port 13, and the outlet of the other gas-liquid separator 10 is communicated with the third port 15 through the fourth port d of the first four-way valve 9, thereby indirectly realizing the communication with the third port 15.
In the above arrangement, the operation modes of the variable capacity compressor 1 include a two-cylinder mode and a two-stage mode. Referring to fig. 4, the first four-way valve 9 is in a two-stage mode when powered on. In this mode, the two compression cylinders of the variable-capacity compressor 1 compress the refrigerant sequentially. Specifically, the space between the first port a and the fourth port d of the first four-way valve 9 is blocked by a moving member, the refrigerant discharged from the outdoor heat exchanger 3 passes through one of the gas-liquid separators 10, then enters the first compression cylinder 11 through the first port 13, is compressed by the first compression cylinder 11, then is discharged through the second port 14, then passes through the second port b and the third port c of the first four-way valve 9, then enters the second compression cylinder 12 through the third port 15, passes through the second compression of the second compression cylinder 12, and then is discharged through the exhaust port 17. In this mode, the variable-capacity compressor 1 can achieve a larger compression ratio at a lower operating frequency, thereby meeting the condensing temperature requirement and ensuring the refrigerating effect and refrigerating efficiency of the air conditioner.
In contrast, referring to fig. 5, the first four-way valve 9 is in a double cylinder mode when it is powered off, in which the two compression cylinders of the variable capacity compressor 1 compress the refrigerant individually. Specifically, a part of the refrigerant discharged from the outdoor heat exchanger 3 passes through one of the gas-liquid separators 10, enters the first compression cylinder 11 from the first port 13, is compressed by the first compression cylinder 11, is discharged from the second port 14, enters the casing through the second port b and the first port a of the first four-way valve 9, and is finally discharged from the exhaust port 17. The other part of refrigerant passes through the other gas-liquid separator 10, then enters the second compression cylinder 12 from the third port 15 through the fourth port d and the third port c of the first four-way valve 9, is compressed by the second compression cylinder 12 and is discharged from the exhaust port 17. The variable-capacity compressor 1 adopts a double-cylinder mode, and the frequency is lower under the same displacement, so that the high pressure of the air conditioning system is low, the low pressure is high, and the compression ratio of the compressor 1 is reduced.
It will be appreciated by those skilled in the art that the above-described air conditioner is merely preferred, and that those skilled in the art may modify the structure of the above-described air conditioner without departing from the principles of the present application, so that the present application is applicable to more specific application scenarios. For example, although the above-described air conditioner is described in connection with the second four-way valve 2, this embodiment is not necessarily the same, and in other embodiments, a person skilled in the art may alternatively omit the second four-way valve 2 to change the air conditioner to a single-cooling or single-heating air conditioner. For another example, the specific form of the throttling element 4 is not limited by the present application, and the throttling element 4 may be a capillary tube or a thermal expansion valve. For another example, the number and the arrangement mode of the heat exchange tube sections, the number of the branch tubes, the connection mode, the number and the arrangement position of the on-off valves in the on-off valve group and other persons skilled in the art can be adaptively adjusted, so that the application is suitable for more specific application scenes. For example, one skilled in the art may increase or decrease the number of heat exchange tube sections, the location of placement, the manner of communication, etc.; alternatively, the number of branch pipes and the communication relation can be increased or decreased; still alternatively, the number and placement of on-off valves may be increased or decreased. In summary, this modification does not deviate from the principle of the application as long as the adjustment of the form of communication of the heat exchange tube sections can be achieved by controlling the opening and closing of the on-off valves in the on-off valve group. For another example, the switching between the two-cylinder mode and the bipolar mode of the variable-volume compressor 1 may be achieved by providing a plurality of valve groups instead of the first four-way valve 9 and controlling the opening and closing of the respective valves in the valve groups. For another example, the specific structural form of the variable-capacity compressor 1 is not constant, and on the premise of being capable of realizing the switching between the double-cylinder mode and the double-stage mode, a person skilled in the art can adjust the structure of the variable-capacity compressor 1, for example, change the number of ports, positions, connection relations and the like. As another example, the arrangement of the gas-liquid separator 10, etc. is not necessary and may be selected by one skilled in the art according to specific needs. For another example, the selective communication or blocking of the communication line 53 may be achieved by a solenoid valve, an electronic expansion valve, or the like, in addition to the first check valve 71. Similarly, the second check valve 72 on the first liquid pipe 61 may be replaced by a solenoid valve or an electronic expansion valve. Further, for example, the second air pipe 64 may be selectively communicated or blocked, and the first air pipe 63 and the second air pipe 64 may be selectively communicated or blocked by two separate electromagnetic valves. For another example, the specific structure of the indoor heat exchanger 5 is not constant, and a person skilled in the art may adjust it, for example, the number of the inner heat exchange line 51 and the outer heat exchange line 52 may be increased. For another example, the specific composition forms of the inner heat exchange pipeline 51 and the outer heat exchange pipeline 52 are not unique, and those skilled in the art can select the number of included heat exchange pipe sections based on the specific application scenario, and accordingly, the number of the communication pipelines 53 needs to be adjusted.
Next, a control method of the air conditioner of the present application will be described with reference to fig. 3.
As shown in fig. 3, the control method of the air conditioner according to the present application includes:
s101, acquiring an operation mode of the air conditioner. In the application, the operation modes of the air conditioner comprise a refrigeration mode and a heating mode, and the operation mode of the air conditioner is obtained in the operation process of the air conditioner.
S103, determining the communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode. For example, in different working modes, the communication modes of the indoor heat exchanger and the outdoor heat exchanger are different, so that the split modes of the indoor heat exchanger and the outdoor heat exchanger, such as the on-off state of the control on-off valve group, the communication state of the three-way control valve, the communication state of the communication pipeline, the communication state of the first liquid pipe, the communication state of the second air pipe and the like, can be switched in a targeted manner according to different application scenes, and the efficient operation of the air conditioner is facilitated.
S105, controlling the air conditioner to work based on the communication mode. For example, after determining the communication form of the indoor heat exchanger and the outdoor heat exchanger, the air conditioner is controlled to be switched to the communication form and operated in this state.
According to the technical scheme, the communication modes of the indoor heat exchanger and the outdoor heat exchanger are determined based on the operation mode, so that the split modes of the indoor heat exchanger and the outdoor heat exchanger can be switched according to different application scenes, the split self-adaptive coupling change is realized, and the heat exchange efficiency and effect of the air conditioner are improved. In addition, the technical scheme has simple structure, does not occupy extra space, and is beneficial to assembly and application.
The present embodiment will be described in detail below.
In one embodiment, the step of "determining the communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode" further includes: when the operation mode is a refrigeration mode, acquiring outdoor environment temperature; the communication form of the outdoor heat exchanger and the indoor heat exchanger is determined based on the outdoor ambient temperature.
Specifically, when the outdoor environment temperature is smaller than a first preset temperature threshold, the first on-off valve, the third on-off valve and the fourth on-off valve are closed, the second on-off valve is opened, the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked. When the outdoor environment temperature is greater than or equal to a first preset temperature threshold, the first on-off valve and the third on-off valve are opened, the second on-off valve and the fourth on-off valve are closed, the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
For example, the first predetermined temperature threshold is 29 ℃. When the air conditioner is in refrigeration operation, the outdoor environment temperature is firstly obtained, and when the outdoor environment temperature Tao is less than 29 ℃, the load of the outdoor unit is smaller, and the heat exchange amount is small. At the moment, the first on-off valve is controlled to be closed, the second on-off valve is controlled to be opened, the third on-off valve is closed, the fourth on-off valve is closed, after being discharged by the compressor and passing through the second four-way valve, a refrigerant enters the first heat exchange tube section from the upper part of the first heat exchange tube section, is discharged from the lower part of the first heat exchange tube section, enters the second heat exchange tube section from the lower part of the second heat exchange tube section, is discharged from the upper part of the second heat exchange tube section, enters the third heat exchange tube section from the upper part of the third heat exchange tube section, and is finally discharged to the throttling element from the lower part of the third heat exchange tube section.
Then, the first port and the second port of the three-way control valve are controlled to be communicated, the third port is disconnected, namely the second air pipe is communicated, and the second air pipe is blocked from the first air pipe. At this time, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline of the indoor heat exchanger through the first liquid pipe and the second liquid pipe after being throttled by the throttle element, flows out respectively through the first air pipe and the second air pipe after heat exchange with indoor air, and flows into the compressor after converging in front of the second four-way valve. In the mode, the flow path of the refrigerant is two in and two out, so that the flow is more in diversion, the pressure drop is small, and the heat exchange effect is good.
It should be noted that, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline after passing through the first liquid pipe and the second liquid pipe, and because the indoor heat exchanger is used as an evaporator in the refrigeration mode, the temperature and the pressure of the refrigerant from the inlet to the outlet are gradually increased, so the refrigerant entering the inner heat exchange pipeline directly flows out to the first air pipe without flowing to the outlet of the outer heat exchange pipeline through the first one-way valve, and the outlet pressure of the outer heat exchange pipeline is higher than the inlet pressure of the inner heat exchange pipeline.
When the outdoor environment temperature Tao is more than or equal to 29 ℃, the load of the outdoor unit is larger, and the heat exchange capacity is large. At this time, the first on-off valve is controlled to be opened, the second on-off valve is controlled to be closed, the third on-off valve is opened, the fourth on-off valve is controlled to be closed, the refrigerant is discharged from the compressor and is divided into two parts, one part of the refrigerant enters the first heat exchange tube section through the upper part of the first heat exchange tube section and is discharged from the lower part of the first heat exchange tube section, and the other part of the refrigerant enters the second heat exchange tube section through the upper part of the second heat exchange tube section and is discharged from the lower part of the second heat exchange tube section. After the refrigerants discharged from the first heat exchange tube section and the second heat exchange tube section are converged, the refrigerants enter the third heat exchange tube section from the upper part of the third heat exchange tube section together, and finally are discharged to the third throttling element from the lower part of the third heat exchange tube section. In the mode, the refrigerant flow is two in and one out, the flow is short, the supercooling end is small, the flow speed is low, the method is suitable for the conditions of medium and high temperature and higher frequency, and the flow splitting is low in condensing temperature and power for heavy load and higher external environment temperature.
Then, the first port and the second port of the three-way control valve are controlled to be communicated, the third port is disconnected, namely the second air pipe is communicated, and the second air pipe is blocked from the first air pipe. At this time, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline of the indoor heat exchanger through the first liquid pipe and the second liquid pipe after being throttled by the throttle element, flows out respectively through the first air pipe and the second air pipe after heat exchange with indoor air, and flows into the compressor after converging in front of the second four-way valve. In the mode, the flow path of the refrigerant is two in and two out, so that the flow is more in diversion, the pressure drop is small, and the heat exchange effect is good.
Therefore, in the refrigeration mode, the communication mode of the indoor heat exchanger and the outdoor heat exchanger is controlled according to the outdoor environment temperature, the running state of the air conditioner is matched with the environment, and the whole energy efficiency of the air conditioner is improved.
Of course, the above control is merely preferred and can be adjusted by a person skilled in the art. For example, the magnitude of the first preset temperature threshold may be adjusted by those skilled in the art based on the specific application scenario.
In one embodiment, the step of "determining the communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode" further includes: when the operation mode is a heating mode, the first on-off valve, the second on-off valve and the fourth on-off valve are opened, the third on-off valve is closed, the communication pipeline is communicated, the first liquid pipe is blocked, the second air pipe is blocked, and the first air pipe and the second air pipe are communicated.
For example, when the operation mode is a heating mode, the indoor heat exchanger serves as a condenser and the outdoor heat exchanger serves as an evaporator. At this time, the first port of the control three-way valve is blocked, the second port is communicated with the third port, namely, the second air pipe is blocked, and the second air pipe is communicated with the first air pipe. At this time, after the refrigerant in the second air pipe and the first air pipe are converged, one end of the inner heat exchange pipeline is divided into two paths to enter the first inner heat exchange pipeline section and the second inner heat exchange pipeline section, after the refrigerant exchanges heat with indoor air, the refrigerant completely enters the first outer heat exchange pipeline section and the second outer heat exchange pipeline section through the communication pipeline due to the existence of the second one-way valve, and after the refrigerant exchanges heat with the indoor air, the refrigerant is converged to the second liquid pipe and is discharged to the throttling element. In the mode, the flow path of the refrigerant in the indoor heat exchanger is two-inlet and one-outlet, the heat exchanger is used as a condenser, the convection heat exchange temperature difference is large in a two-inlet and one-outlet mode, the supercooling degree is large, and the air conditioner power is low.
Then, the first on-off valve is controlled to be opened, the second on-off valve is controlled to be opened, the third on-off valve is controlled to be closed, the fourth on-off valve is controlled to be opened, the refrigerant enters from one end of the outdoor heat exchanger after being throttled by the throttling element and is divided into three flow paths, and one flow path exchanges heat with outdoor air through the third heat exchange pipe section and flows back to the compressor through the second on-off valve and the first branch pipe. One flow path is divided into two after passing through the third branch pipe and the fourth on-off valve, wherein one flow path exchanges heat with outdoor air through the first heat exchange pipe section and flows back to the compressor, and the other flow path exchanges heat with outdoor air through the second heat exchange pipe section and flows back to the compressor after passing through the first on-off valve. In the mode, the flow path of the refrigerant in the outdoor heat exchanger is three-in and three-out, so that the refrigerant is more in split flow, small in pressure drop and good in heat exchange effect as the evaporator.
Therefore, in a heating mode, the indoor heat exchanger and the outdoor heat exchanger can be kept high-efficiency heat exchange by controlling the communication mode of the indoor heat exchanger and the outdoor heat exchanger, so that the running energy efficiency of the whole machine is improved.
Another preferred embodiment of the control method of the present application will be described with reference to fig. 6.
As shown in fig. 6, the control method of the present application corresponds to the second embodiment of the air conditioner, and includes:
s201, acquiring an operation mode of the air conditioner. In the application, the operation modes of the air conditioner comprise a refrigeration mode and a heating mode, and the operation mode of the air conditioner is obtained in the operation process of the air conditioner.
S203, based on the operation mode, a communication form of the outdoor heat exchanger and the indoor heat exchanger, and an operation mode of the variable capacity compressor are determined. For example, in different working modes, the communication modes of the indoor heat exchanger and the outdoor heat exchanger are different, so that the split modes of the indoor heat exchanger and the outdoor heat exchanger, such as the on-off state of the control on-off valve group, the communication state of the three-way control valve, the communication state of the communication pipeline, the communication state of the first liquid pipe, the communication state of the second air pipe and the like, can be switched in a targeted manner according to different application scenes, and the efficient operation of the air conditioner is facilitated. The working modes of the variable-capacity compressor comprise a double-cylinder mode and a double-stage mode, wherein in the double-cylinder mode, two compression cylinders of the variable-capacity compressor independently compress the refrigerant, and in the double-stage mode, the two compression cylinders of the variable-capacity compressor sequentially compress the refrigerant. Under different operation modes, the working modes of the compressors are different, and the working modes of the compressors are determined based on the operation modes of the air conditioner, so that the overall operation effect of the air conditioner is improved.
S205, controlling the air conditioner to work based on the communication form and the working mode. For example, after determining the communication form of the indoor heat exchanger and the outdoor heat exchanger, and the operation mode of the compressor, the air conditioner is controlled to be switched to the corresponding communication form, the compressor is switched to the corresponding operation mode, and is operated in this state.
According to the technical scheme, the communication mode of the outdoor heat exchanger and the indoor heat exchanger and the working mode of the variable-capacity compressor are determined based on the operation mode of the air conditioner, the split mode of the indoor heat exchanger and the outdoor heat exchanger can be switched according to different application scenes, the self-adaptive coupling change of split is realized, and the heat exchange efficiency and effect of the air conditioner are improved. Through setting up the variable-capacity compressor, can utilize the variable-capacity compressor to realize the switching of multiple operating mode in the reposition of redundant personnel in-process for the air conditioner operation is more high-efficient, stable. In addition, the technical scheme has simple structure, does not occupy extra space, and is beneficial to assembly and application.
The present embodiment will be described in detail below.
In one possible embodiment, the step of determining the communication form of the outdoor heat exchanger and the indoor heat exchanger, and the operation mode of the variable capacity compressor based on the operation mode further includes: when the operation mode is a refrigeration mode, acquiring the outdoor environment temperature and the first condensing pressure of the outdoor heat exchanger; determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor environment temperature; based on the first condensing pressure, an operating mode of the variable-capacity compressor is determined.
Specifically, the step of "determining the communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor ambient temperature" further includes: when the outdoor environment temperature is smaller than a first preset temperature threshold, the first on-off valve, the third on-off valve and the fourth on-off valve are closed, the second on-off valve is opened, the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked. When the outdoor environment temperature is greater than or equal to a first preset temperature threshold, the first on-off valve and the third on-off valve are opened, the second on-off valve and the fourth on-off valve are closed, the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
For example, the first predetermined temperature threshold is 29 ℃. When the air conditioner is in refrigeration operation, the outdoor environment temperature is firstly obtained, and when the outdoor environment temperature Tao is less than 29 ℃, the load of the outdoor unit is smaller, and the heat exchange amount is small. At the moment, the first on-off valve is controlled to be closed, the second on-off valve is controlled to be opened, the third on-off valve is closed, the fourth on-off valve is closed, after being discharged by the compressor and passing through the second four-way valve, a refrigerant enters the first heat exchange tube section from the upper part of the first heat exchange tube section, is discharged from the lower part of the first heat exchange tube section, enters the second heat exchange tube section from the lower part of the second heat exchange tube section, is discharged from the upper part of the second heat exchange tube section, enters the third heat exchange tube section from the upper part of the third heat exchange tube section, and is finally discharged to the throttling element from the lower part of the third heat exchange tube section.
Then, the first port and the second port of the three-way control valve are controlled to be communicated, the third port is disconnected, namely the second air pipe is communicated, and the second air pipe is blocked from the first air pipe. At this time, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline of the indoor heat exchanger through the first liquid pipe and the second liquid pipe after being throttled by the throttle element, flows out respectively through the first air pipe and the second air pipe after heat exchange with indoor air, and flows into the compressor after converging in front of the second four-way valve. In the mode, the flow path of the refrigerant is two in and two out, so that the flow is more in diversion, the pressure drop is small, and the heat exchange effect is good.
It should be noted that, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline after passing through the first liquid pipe and the second liquid pipe, and because the indoor heat exchanger is used as an evaporator in the refrigeration mode, the temperature and the pressure of the refrigerant from the inlet to the outlet are gradually increased, so the refrigerant entering the inner heat exchange pipeline directly flows out to the first air pipe without flowing to the outlet of the outer heat exchange pipeline through the first one-way valve, and the outlet pressure of the outer heat exchange pipeline is higher than the inlet pressure of the inner heat exchange pipeline.
When the outdoor environment temperature Tao is more than or equal to 29 ℃, the load of the outdoor unit is larger, and the heat exchange capacity is large. At this time, the first on-off valve is controlled to be opened, the second on-off valve is controlled to be closed, the third on-off valve is opened, the fourth on-off valve is controlled to be closed, the refrigerant is discharged from the compressor and is divided into two parts, one part of the refrigerant enters the first heat exchange tube section through the upper part of the first heat exchange tube section and is discharged from the lower part of the first heat exchange tube section, and the other part of the refrigerant enters the second heat exchange tube section through the upper part of the second heat exchange tube section and is discharged from the lower part of the second heat exchange tube section. After the refrigerants discharged from the first heat exchange tube section and the second heat exchange tube section are converged, the refrigerants enter the third heat exchange tube section from the upper part of the third heat exchange tube section together, and finally are discharged to the third throttling element from the lower part of the third heat exchange tube section. In the mode, the refrigerant flow is two in and one out, the flow is short, the supercooling end is small, the flow speed is low, the method is suitable for the conditions of medium and high temperature and higher frequency, and the flow splitting is low in condensing temperature and power for heavy load and higher external environment temperature.
Then, the first port and the second port of the three-way control valve are controlled to be communicated, the third port is disconnected, namely the second air pipe is communicated, and the second air pipe is blocked from the first air pipe. At this time, the refrigerant enters the inner heat exchange pipeline and the outer heat exchange pipeline of the indoor heat exchanger through the first liquid pipe and the second liquid pipe after being throttled by the throttle element, flows out respectively through the first air pipe and the second air pipe after heat exchange with indoor air, and flows into the compressor after converging in front of the second four-way valve. In the mode, the flow path of the refrigerant is two in and two out, so that the flow is more in diversion, the pressure drop is small, and the heat exchange effect is good.
Therefore, in the refrigeration mode, the communication mode of the indoor heat exchanger and the outdoor heat exchanger is controlled according to the outdoor environment temperature, the running state of the air conditioner is matched with the environment, and the whole energy efficiency of the air conditioner is improved.
Of course, the above control is merely preferred and can be adjusted by a person skilled in the art. For example, the magnitude of the first preset temperature threshold may be adjusted by those skilled in the art based on the specific application scenario.
In one possible embodiment, the step of determining the operating mode of the variable-capacity compressor based on the first condensing pressure further comprises: if the first condensing pressure is larger than a first preset pressure threshold value, determining that the working mode of the variable-capacity compressor is a two-stage mode; and if the first condensing pressure is smaller than or equal to a first preset pressure threshold value, determining that the working mode of the variable-capacity compressor is a double-cylinder mode.
For example, the first condensing pressure may be obtained by providing a pressure sensor on the outdoor heat exchanger, the pressure value reflecting the heat exchanging state of the outdoor heat exchanger. The first preset pressure threshold value can be determined through a comparison table between the outdoor environment temperature and the first preset pressure threshold value, and can also be determined based on experiments, experience, fitting formulas and the like. After the first condensing pressure is obtained, the difference or the ratio between the first condensing pressure and a first preset pressure threshold value is calculated to calculate the size of the first condensing pressure and the first preset pressure threshold value. Specifically, when the first condensing pressure is less than or equal to a first preset pressure threshold, the condensing pressure in the outdoor heat exchanger is not high, and the heat exchange amount of the outdoor heat exchanger is not large. At the moment, the compressor is controlled to operate in a double-cylinder mode, and larger exhaust capacity can be achieved under the same frequency, so that the operation efficiency and the refrigeration effect are improved. When the first condensing pressure is larger than a first preset pressure threshold value, the condensing pressure in the outdoor heat exchanger is proved to be too high, the heat exchange capacity of the outdoor heat exchanger is large at the moment, the working mode of the compressor is switched to a two-stage mode at the moment, and a larger compression ratio can be realized at a lower operating frequency, so that the condensing temperature requirement is met, and the refrigerating effect and refrigerating efficiency of the air conditioner are ensured.
Therefore, the working mode of the compressor is determined based on the first condensing pressure of the outdoor heat exchanger in the refrigeration mode, so that the heat exchange state of the compressor and the current outdoor heat exchanger is more matched, and the air-conditioning energy efficiency is improved.
In one possible embodiment, the step of "determining the communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode" further includes: when the operation mode is a heating mode, the first on-off valve, the second on-off valve and the fourth on-off valve are opened, the third on-off valve is closed, the communication pipeline is communicated, the first liquid pipe is blocked, the second air pipe is blocked, and the first air pipe and the second air pipe are communicated.
For example, when the operation mode is a heating mode, the indoor heat exchanger serves as a condenser and the outdoor heat exchanger serves as an evaporator. At this time, the first port of the control three-way valve is blocked, the second port is communicated with the third port, namely, the second air pipe is blocked, and the second air pipe is communicated with the first air pipe. At this time, after the refrigerant in the second air pipe and the first air pipe are converged, one end of the inner heat exchange pipeline is divided into two paths to enter the first inner heat exchange pipeline section and the second inner heat exchange pipeline section, after the refrigerant exchanges heat with indoor air, the refrigerant completely enters the first outer heat exchange pipeline section and the second outer heat exchange pipeline section through the communication pipeline due to the existence of the second one-way valve, and after the refrigerant exchanges heat with the indoor air, the refrigerant is converged to the second liquid pipe and is discharged to the throttling element. In the mode, the flow path of the refrigerant in the indoor heat exchanger is two-inlet and one-outlet, the heat exchanger is used as a condenser, the convection heat exchange temperature difference is large in a two-inlet and one-outlet mode, the supercooling degree is large, and the air conditioner power is low.
Then, the first on-off valve is controlled to be opened, the second on-off valve is controlled to be opened, the third on-off valve is controlled to be closed, the fourth on-off valve is controlled to be opened, the refrigerant enters from one end of the outdoor heat exchanger after being throttled by the throttling element and is divided into three flow paths, and one flow path exchanges heat with outdoor air through the third heat exchange pipe section and flows back to the compressor through the second on-off valve and the first branch pipe. One flow path is divided into two after passing through the third branch pipe and the fourth on-off valve, wherein one flow path exchanges heat with outdoor air through the first heat exchange pipe section and flows back to the compressor, and the other flow path exchanges heat with outdoor air through the second heat exchange pipe section and flows back to the compressor after passing through the first on-off valve. In the mode, the flow path of the refrigerant in the outdoor heat exchanger is three-in and three-out, so that the refrigerant is more in split flow, small in pressure drop and good in heat exchange effect as the evaporator.
Therefore, in a heating mode, the indoor heat exchanger and the outdoor heat exchanger can be kept high-efficiency heat exchange by controlling the communication mode of the indoor heat exchanger and the outdoor heat exchanger, so that the running energy efficiency of the whole machine is improved.
In one possible embodiment, the step of determining the operation mode of the variable-capacity compressor based on the operation mode further comprises: when the operation mode is a heating mode, obtaining a second condensing pressure of the indoor heat exchanger; based on the second condensing pressure, an operating mode of the variable-capacity compressor is determined.
Specifically, if the second condensing pressure is greater than a second preset pressure threshold, determining that the working mode of the variable-capacity compressor is a two-stage mode; and if the second condensing pressure is smaller than or equal to a second preset pressure threshold value, determining that the working mode of the variable-capacity compressor is a double-cylinder mode.
For example, the second condensing pressure may be obtained by providing a pressure sensor on the indoor heat exchanger, the pressure value reflecting the heat exchanging state of the indoor heat exchanger. The second preset pressure threshold value can be determined through a comparison table between the indoor environment temperature and the second preset pressure threshold value, and can also be determined based on experiments, experience, fitting formulas and the like. After the second condensing pressure is obtained, the difference or the ratio between the second condensing pressure and a second preset pressure threshold value is calculated to calculate the size of the second condensing pressure and the second preset pressure threshold value. Specifically, when the second condensing pressure is less than or equal to a second preset pressure threshold, the condensing pressure in the indoor heat exchanger is not high, and the heat exchange amount of the indoor heat exchanger is not large. At the moment, the compressor is controlled to operate in a double-cylinder mode, and larger exhaust capacity can be achieved under the same frequency, so that the operation efficiency and the refrigeration effect are improved. When the second condensing pressure is larger than a second preset pressure threshold value, the condensing pressure in the indoor heat exchanger is proved to be too high, the heat exchange capacity of the indoor heat exchanger is large at the moment, the working mode of the compressor is switched to a two-stage mode at the moment, and the larger compression ratio can be realized at a lower operating frequency, so that the condensing temperature requirement is met, and the refrigerating effect and the refrigerating efficiency of the air conditioner are ensured.
Therefore, in the heating mode, the working mode of the compressor is determined based on the second condensing pressure of the indoor heat exchanger, so that the heat exchange state of the compressor and the current indoor heat exchanger is more matched, and the air conditioning energy efficiency is improved.
Although the steps are described in the above-described sequential order in the above-described embodiments, it will be appreciated by those skilled in the art that in order to achieve the effects of the present embodiments, the steps need not be performed in such order, and may be performed simultaneously (in parallel) or in reverse order, and such simple variations are within the scope of the present application.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.

Claims (10)

1. A control method of an air conditioner is characterized in that the air conditioner comprises a compressor, an outdoor heat exchanger, a throttling element and an indoor heat exchanger,
the indoor heat exchanger comprises an inner heat exchange pipeline and an outer heat exchange pipeline which are independent of each other, a first end of the inner heat exchange pipeline and a first end of the outer heat exchange pipeline are respectively communicated with the throttling element through a first liquid pipe and a second liquid pipe, a second end of the inner heat exchange pipeline and a second end of the outer heat exchange pipeline are respectively communicated with the compressor through a first air pipe and a second air pipe, a communication pipeline is further arranged between the first end of the inner heat exchange pipeline and the second end of the outer heat exchange pipeline, the communication pipeline can be selectively communicated or blocked, the first liquid pipe can be selectively communicated or blocked, the second air pipe can be selectively communicated or blocked, the first air pipe and the second air pipe can be selectively communicated or blocked,
the outdoor heat exchanger comprises a plurality of heat exchange tube sections, an on-off valve group is further arranged in the outdoor heat exchanger, the on-off valve group comprises a plurality of on-off valves, and the on-off valve group is arranged to be capable of controlling the communication form among the plurality of heat exchange tube sections;
The control method comprises the following steps:
acquiring an operation mode of the air conditioner;
determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode;
and controlling the air conditioner to work based on the communication form.
2. The method according to claim 1, wherein the outdoor heat exchanger includes a first heat exchange pipe section, a second heat exchange pipe section, and a third heat exchange pipe section connected in this order, the outdoor heat exchanger further includes a first branch pipe, a second branch pipe, and a third branch pipe, a first end of the first branch pipe is connected to a refrigerant pipe between the compressor and the first heat exchange pipe section, a second end of the first branch pipe is connected to a refrigerant pipe between the second heat exchange pipe section and the third heat exchange pipe section, a first end of the second branch pipe is connected to the third branch pipe, a second end of the second branch pipe is connected to an end of the third heat exchange pipe section near the second heat exchange pipe section, a first end of the third branch pipe is connected to a refrigerant pipe between the first heat exchange pipe section and the second heat exchange pipe section, a second end of the third branch pipe is connected to a refrigerant pipe between the third heat exchange pipe section and the throttling element,
The on-off valve group comprises a first on-off valve, a second on-off valve, a third on-off valve and a fourth on-off valve, wherein the first on-off valve is arranged on the first branch pipe, the second on-off valve is arranged on a refrigerant pipe between the second heat exchange pipe section and the third heat exchange pipe section and is positioned between the second end of the first branch pipe and the third heat exchange pipe section, the third on-off valve is arranged on the second branch pipe, and the fourth on-off valve is arranged on the third branch pipe and is positioned between the first end of the second branch pipe and the second end of the third branch pipe.
3. The control method of an air conditioner according to claim 2, wherein the step of determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode further comprises:
when the operation mode is a refrigeration mode, acquiring outdoor environment temperature;
and determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor environment temperature.
4. The control method of an air conditioner according to claim 3, wherein the step of determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor ambient temperature further comprises:
When the outdoor environment temperature is smaller than a first preset temperature threshold, the first on-off valve, the third on-off valve and the fourth on-off valve are closed, the second on-off valve is opened, and the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
5. The control method of an air conditioner according to claim 4, wherein the step of determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the outdoor ambient temperature further comprises:
when the outdoor environment temperature is greater than or equal to the first preset temperature threshold, the first on-off valve and the third on-off valve are opened, the second on-off valve and the fourth on-off valve are closed, and the communication pipeline is blocked, the first liquid pipe is communicated, the second air pipe is communicated, and the first air pipe and the second air pipe are blocked.
6. The control method of an air conditioner according to claim 2, wherein the step of determining a communication form of the outdoor heat exchanger and the indoor heat exchanger based on the operation mode further comprises:
When the operation mode is a heating mode, the first on-off valve, the second on-off valve and the fourth on-off valve are opened, the third on-off valve is closed, and the communication pipeline is communicated, the first liquid pipe is blocked, the second air pipe is blocked, and the first air pipe and the second air pipe are communicated.
7. The method according to claim 6, wherein the second air pipe is provided with a three-way control valve, and a first port, a second port and a third port of the three-way control valve are respectively connected to the second end of the heat exchange tube, the compressor and the first air pipe.
8. The control method of an air conditioner according to claim 7, wherein the controlling of the communication between the first air pipe and the second air pipe is achieved by:
and controlling the second port to be communicated with the third port.
9. The control method of an air conditioner according to any one of claims 1 to 6, wherein a first check valve is provided on the communication pipe, the first check valve being provided to be turned on when a refrigerant flows from a first end of the inner heat exchange pipe to a second end of the outer heat exchange pipe.
10. The control method according to any one of claims 1 to 6, wherein a second check valve is provided on the first liquid pipe, the second check valve being provided to be turned on when the refrigerant flows from the throttling element to the first end of the inner heat exchange line.
CN202310963928.9A 2023-08-02 2023-08-02 Control method of air conditioner Active CN116906985B (en)

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CN115468222A (en) * 2022-10-13 2022-12-13 珠海格力电器股份有限公司 Indoor heat exchange structure, air conditioning system and control method thereof
CN218296023U (en) * 2022-02-28 2023-01-13 青岛海尔空调器有限总公司 Heat exchanger and air conditioner
CN116255715A (en) * 2023-03-31 2023-06-13 青岛海尔空调器有限总公司 Control method of air conditioner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100107681A1 (en) * 2007-03-28 2010-05-06 Mitsubishi Electric Corporation Heat exchanger and refrigeration cycle apparatus
US20130227985A1 (en) * 2010-12-08 2013-09-05 Daikin Industries, Ltd. Air conditioner
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Effective date of registration: 20260113

Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China

Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.

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Patentee after: QINGDAO HAIER SMART TECHNOLOGY R&D Co.,Ltd.

Patentee after: Haier Smart Home Co., Ltd.

Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China

Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.

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Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd.

Patentee before: QINGDAO HAIER SMART TECHNOLOGY R&D Co.,Ltd.

Patentee before: Haier Smart Home Co., Ltd.