CN117287880A - Control method of air conditioner refrigerating system, controller and air conditioner - Google Patents

Control method of air conditioner refrigerating system, controller and air conditioner Download PDF

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Publication number
CN117287880A
CN117287880A CN202210686531.5A CN202210686531A CN117287880A CN 117287880 A CN117287880 A CN 117287880A CN 202210686531 A CN202210686531 A CN 202210686531A CN 117287880 A CN117287880 A CN 117287880A
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CN
China
Prior art keywords
temperature
air conditioner
refrigerant
compensation value
branch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210686531.5A
Other languages
Chinese (zh)
Inventor
俞国新
殷纪强
许文明
王飞
朱万朋
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 Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
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Publication date
Application filed by Qingdao Haier Smart Technology R&D Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Smart Technology R&D Co Ltd
Priority to CN202210686531.5A priority Critical patent/CN117287880A/en
Publication of CN117287880A publication Critical patent/CN117287880A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion 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
    • 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
    • F25B49/022—Compressor control arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20281—Thermal management, e.g. liquid flow control
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures

Landscapes

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

Abstract

The invention provides a control method of an air conditioner refrigerating system, a controller and an air conditioner, wherein the refrigerating system comprises a compressor, an outdoor unit heat exchanger, a main throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerating circulation pipeline, two sides of the main throttle valve are connected in parallel with cooling branches, the cooling branches penetrate into a radiating plate arranged on a high-temperature area of an outdoor unit electric control board of the air conditioner, heat emitted by the high-temperature area is carried away by a refrigerant introduced into the refrigerating system, the cooling branches are connected with branch control valves in series, and the control method comprises the following steps: acquiring the temperature of a refrigerant at the outlet of the cooling branch; and adjusting the opening of the main throttle valve and the opening of the branch control valve according to the temperature of the refrigerant at the outlet of the cooling branch so that the temperature of the refrigerant at the outlet of the cooling branch is smaller than or equal to a preset target temperature threshold. According to the scheme, the heat dissipation effect of the electric control plate and the temperature regulation effect of the air conditioner are improved.

Description

Control method of air conditioner refrigerating system, controller and air conditioner
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control method of a refrigeration system of an air conditioner, a controller and an air conditioner.
Background
The electric control board of the air conditioner is provided with high-power electric control devices, such as IPM (Intelligent Power Module ), IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), diode, rectifier bridge and the like, so that the temperature of a local area on the electric control board is high, and heat dissipation is difficult.
In the prior art, the cooling medium of the air conditioner refrigerating system is used for radiating the electric control plate, however, the radiating mode is difficult to control, and the temperature adjusting function of the air conditioner is easily damaged, so that the energy consumption of the air conditioner is increased, and the use experience of a user is greatly influenced.
Disclosure of Invention
An object of the present invention is to provide a control method, a controller and an air conditioner for an air conditioner refrigerating system, which can improve the heat dissipation efficiency of an electric control board.
A further object of the present invention is to reduce the influence of the cooling of the electric control panel on the temperature regulating function of the air conditioner and to reduce the energy consumption of the air conditioner.
Particularly, the invention provides a control method of an air conditioner refrigerating system, wherein the refrigerating system comprises a compressor, an outdoor unit heat exchanger, a main throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerating circulation pipeline, wherein two sides of the main throttle valve are connected in parallel with cooling branches, the cooling branches penetrate into a heat dissipation plate arranged on a high-temperature area of an outdoor unit electric control board of the air conditioner, heat emitted by the high-temperature area is taken away by a refrigerant introduced into the refrigerating system, the cooling branches are connected in series with branch control valves, and the control method comprises the following steps: acquiring the temperature of a refrigerant at the outlet of the cooling branch; and adjusting the opening of the main throttle valve and the opening of the branch control valve according to the temperature of the refrigerant at the outlet of the cooling branch so that the temperature of the refrigerant at the outlet of the cooling branch is smaller than or equal to a preset target temperature threshold.
Further, the step of adjusting the opening of the main throttle valve and the bypass control valve according to the temperature of the refrigerant at the outlet of the cooling bypass comprises the following steps: judging whether the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to a target temperature threshold value; if yes, controlling the opening degrees of the main throttle valve and the branch control valve to be unchanged; if not, controlling the opening degree of the main throttle valve to decrease and controlling the opening degree of the branch control valve to increase until the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold.
Further, in the opening adjustment process of the main throttle valve and the branch control valve, the refrigerant temperature at the outlet of the cooling branch is repeatedly obtained, so as to re-judge whether the refrigerant temperature at the outlet of the cooling branch is less than or equal to a target temperature threshold.
Further, before the step of determining whether the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold, the method further includes: acquiring the temperature of a refrigerant before throttling of a main throttle valve; acquiring a preset temperature compensation value; determining a target temperature threshold according to the temperature of the refrigerant before throttling of the main throttle valve and the temperature compensation value; wherein the target temperature threshold is configured as a sum of the refrigerant temperature before throttling of the main throttle valve and the temperature compensation value.
Further, the refrigeration system further includes a reversing valve, and the reversing valve changes the flow direction of the refrigerant in the refrigeration system to make the air conditioner operate in a refrigeration mode or a heating mode, so as to obtain a preset temperature compensation value, and the method includes the steps of: acquiring the environment temperature and the operation mode of the air conditioner; a temperature compensation value is determined based on the ambient temperature and the operating mode.
Further, the step of determining the temperature compensation value according to the ambient temperature and the operation mode includes: judging whether the operation mode is a heating mode or not; if yes, determining the temperature compensation value as a preset first temperature compensation value.
Further, when the operation mode is a refrigeration mode, judging whether the ambient temperature is greater than a preset ambient temperature threshold value; if yes, determining the temperature compensation value as a preset second temperature compensation value; wherein the second temperature compensation value is less than the first temperature compensation value.
Further, when the ambient temperature is less than or equal to the ambient temperature threshold, determining the temperature compensation value as a preset third temperature compensation value; wherein the third temperature compensation value is less than the second temperature compensation value.
The invention also provides a controller, comprising: a memory and a processor; the memory stores a machine executable program which when executed by the processor implements the control method of the air conditioner refrigeration system of any one of the above.
The invention also provides an air conditioner, comprising: the refrigerating system comprises a compressor, a reversing valve, an outdoor unit heat exchanger, a main throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerating circulation pipeline, wherein the reversing valve enables the air conditioner to operate in a refrigerating mode or a heating mode by changing the flow direction of a refrigerant in the refrigerating system; an outdoor unit electric control board, wherein a heat dissipation plate is arranged at a high temperature area of the outdoor unit electric control board; the cooling branch is connected in parallel with two sides of the main throttle valve, penetrates into the heat dissipation plate, takes away heat emitted by a high-temperature area through a refrigerant introduced into the refrigerating system, and is connected with the branch control valve in series; the controller described above.
The invention also provides an air conditioner, comprising: the refrigerating system comprises a compressor, a reversing valve, an outdoor unit heat exchanger, a main throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerating circulation pipeline, wherein the reversing valve enables the air conditioner to operate in a refrigerating mode or a heating mode by changing the flow direction of a refrigerant in the refrigerating system; an outdoor unit electric control board, wherein a heat dissipation plate is arranged at a high temperature area of the outdoor unit electric control board; the cooling branch is connected in parallel with two sides of the main throttle valve, penetrates into the heat dissipation plate, takes away heat emitted by a high-temperature area through a refrigerant introduced into the refrigerating system, and is connected with the branch control valve in series; the controller described above.
According to the control method of the air conditioner refrigerating system, the controller and the air conditioner, the opening degrees of the main throttle valve and the branch control valve are adjusted, so that the temperature of the refrigerant at the outlet of the cooling branch is smaller than or equal to the preset target temperature threshold, the heat dissipation effect of the refrigerant in the cooling branch on the heat dissipation plate is ensured, and the heat dissipation efficiency of the electric control plate is further improved.
Further, according to the control method of the air conditioner refrigerating system, the controller and the air conditioner, when the temperature of the refrigerant at the outlet of the cooling branch is greater than the target temperature threshold, the opening of the main throttle valve is controlled to be increased, and the opening of the branch control valve is controlled to be decreased, so that the quantity of the refrigerant flowing in the cooling branch is increased, and the radiating effect of the cooling branch on the radiating plate is improved. In addition, after the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold value, the process of increasing the opening of the main throttle valve and decreasing the opening of the branch control valve is interrupted, and the opening of the main throttle valve and the opening of the branch control valve are controlled to be unchanged, so that the cooling effect of the cooling branch on the heat dissipation plate is ensured, the excessive quantity of the refrigerant in the cooling branch is avoided, the influence of the cooling of the electric control board on the temperature regulating function of the air conditioner is reduced, and the energy consumption of the air conditioner is reduced.
Further, according to the control method of the air conditioner refrigerating system, the controller and the air conditioner, the target temperature threshold is configured to be correspondingly adjusted along with the change of the running mode and the ambient temperature, so that the refrigerant at the outlet of the cooling branch can be kept in a corresponding relatively reasonable temperature range under different circumstances. The cooling device not only ensures the heat dissipation effect of the refrigerant in the cooling branch on the heat dissipation plate under different circumstances, but also gives consideration to the temperature adjusting function of the air conditioner, reduces the energy consumption of the air conditioner and further improves the use experience of users.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of a refrigerating system of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of an outdoor unit casing of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic view of an electric control board of an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic view of a heat dissipating plate of an air conditioner according to an embodiment of the present invention;
fig. 6 is an exploded view of a heat radiating plate of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic view of a control method of an air conditioner refrigerating system according to an embodiment of the present invention;
fig. 8 is a schematic view of a control method of an air conditioner refrigerating system according to another embodiment of the present invention;
FIG. 9 is a detailed flowchart of the step of obtaining the preset temperature compensation value in FIG. 8;
FIG. 10 is a detailed flow chart of the step of FIG. 9 of determining a temperature compensation value based on ambient temperature and operating mode;
fig. 11 is a schematic view of a control method of an air conditioner refrigerating system according to still another embodiment of the present invention;
fig. 12 is a schematic view of a controller of an air conditioner according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the specific embodiments shown in fig. 1 to 12. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
In the description of the present invention, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
Fig. 1 is a schematic block diagram of an air conditioner according to an embodiment of the present invention. Fig. 2 is a schematic view of a refrigerating system of an air conditioner according to an embodiment of the present invention.
As shown, the air conditioner may generally include an indoor unit 30 and an outdoor unit 20. The indoor unit 30 and the outdoor unit 20 are connected to each other through a refrigeration cycle line and an electric line.
The indoor unit 30 may generally include an indoor unit heat exchanger 150, an indoor fan (not shown), and the like. The indoor unit 30 may be generally configured as a wall-mounted, vertical, ceiling-mounted unit, or the like. The indoor fan forms heat exchange air flow flowing through the indoor heat exchanger to adjust indoor temperature. Wherein, the wind speed of the indoor fan can be set to be matched with the temperature of the indoor unit heat exchanger 150 so as to improve the temperature adjusting effect of the air conditioner on the indoor temperature.
The outdoor unit 20 may generally include an outdoor heat exchanger 130, an outdoor fan (not shown), a compressor 110, a main throttle valve 140, a bypass control valve 170, an electric control board 230, and the like. The compressor 110 is controlled and regulated by an electronic control board 230 to power the refrigerant circulation in the refrigeration system. The outdoor heat exchanger 130 cools the refrigerant discharged from the compressor 110. The outdoor fan forms a heat-radiating air flow flowing through the outdoor heat exchanger 130 to promote heat radiation of the outdoor heat exchanger 130.
The refrigeration cycle line connects the outdoor heat exchanger 130 of the outdoor unit 20 and the indoor heat exchanger 150 of the indoor unit 30 to form a refrigerant cycle, and heat exchange between the indoor and outdoor units is achieved by the circulation flow of the refrigerant.
The electric control board 230 generally includes a frequency conversion device, such as an IPM (Intelligent Power Module, i.e., intelligent power module), for driving the compressor 110. During operation of the compressor 110, the IPM on the electric control board 230 releases a large amount of heat, resulting in difficulty in heat dissipation of the electric control board 230. The electric control board 230 is generally disposed on the outdoor unit 20, and thus, the electric control board 230 is also called an outdoor unit electric control board 230.
The heat dissipation plate 210 is disposed on the electric control plate 230, and the refrigerant of the cooling branch 160 flows through the heat dissipation plate 210 to remove at least part of heat.
As shown in fig. 2, the refrigeration system includes a compressor 110, a reversing valve 120, an outdoor heat exchanger 130, a main throttle valve 140, a bypass control valve 170, and an indoor heat exchanger 150, which are sequentially connected by a refrigeration cycle line. The compressor 110 is driven by a motor as power of the refrigeration cycle to rotate continuously, thereby providing power of the refrigerant cycle. The reversing valve 120 is connected to the discharge port of the compressor 110 for changing the flow direction of the refrigerant in the refrigerating system so that the air conditioner operates in a cooling mode or a heating mode. In some preferred embodiments, the reversing valve 120 may be a four-way valve. Wherein the bypass control valve 170 is disposed in parallel with the main throttle valve 140. The cooling branch 160 is connected in parallel to both sides of the main throttle valve 140, and the branch control valve 170 is connected in series to the cooling branch 160 to regulate and control the refrigerant flowing through the cooling branch 160.
The direction of the solid arrow in fig. 2 is the flow direction of the refrigerant of the air conditioner operating in the cooling mode. The direction of the dotted arrow in fig. 2 is the flow direction of the refrigerant of the air conditioner operating in the heating mode.
When the air conditioner is operated in the cooling mode, the refrigerant flows to the outdoor heat exchanger 130 through the reversing valve 120 under the action of the compressor 110, then flows to the indoor heat exchanger 150 through the main throttle valve 140 or the bypass control valve 170, and finally returns to the compressor 110. When the air conditioner is operated in the cooling mode, the refrigerant flows to the indoor heat exchanger 150 through the reversing valve 120 under the action of the compressor 110, then flows to the outdoor heat exchanger 130 through the main throttle valve 140 or the bypass control valve 170, and finally returns to the compressor 110.
Fig. 3 is a schematic view of an outdoor unit casing 220 of an air conditioner according to an embodiment of the present invention. Fig. 4 is a schematic view of an electric control board 230 of an air conditioner according to an embodiment of the present invention. Fig. 5 is a schematic view of a heat dissipation plate 210 of an air conditioner according to an embodiment of the present invention. Fig. 6 is an exploded view of a heat dissipating plate 210 of an air conditioner according to an embodiment of the present invention.
The heat dissipation plate 210 is disposed at the high temperature region of the electric control plate 230 to absorb heat emitted from the high temperature region of the electric control plate 230, thereby promoting heat dissipation of the electric control plate 230. The heat dissipation plate 210 is made of a material with good heat conduction performance, and generally may be made of aluminum. The shape of the heat dissipation plate 210 is adapted to the structure of the electric control plate 230, and the heat dissipation plate 210 covers at least a high temperature area of the electric control plate 230 to ensure the heat dissipation effect of the heat dissipation plate 210 on the electric control plate 230.
In some preferred embodiments, the heat dissipation plate 210 is configured as a rectangular plate body, one side of which is abutted against the electric control plate 230, and is fixed to the electric control plate 230 by means of screws or adhesion, etc. The side of the heat dissipation plate 210 near the electric control plate 230 may be further provided with a positioning structure, and is covered with heat conducting silica gel, so that the heat resistance between the heat dissipation plate 210 and the electric control plate 230 is reduced while the position of the heat dissipation plate 210 can effectively cover a high temperature area, and the heat dissipation effect of the heat dissipation plate 210 on the electric control plate 230 is improved.
The cooling branches 160 are connected in parallel to both sides of the main throttle valve 140, and the cooling branches 160 penetrate into the heat dissipation plate 210 disposed on the high temperature region of the outdoor unit electric control plate 230 of the air conditioner, and carry away heat dissipated from the high temperature region by the refrigerant introduced into the refrigerating system.
The cooling branch 160 is connected in series with a branch control valve 170 to regulate and control the refrigerant flowing in the cooling branch 160.
As shown in fig. 5-6, the heat dissipation plate 210 may generally include: a first plate 211 and a second plate 212.
One side of the first plate body 211 is attached to the high temperature area of the electric control plate 230, and the other side is provided with a first groove 213. The second plate 212 is disposed on the first plate 211, where a first groove 213 is formed, and a second groove 214 is formed on a side of the second plate 212 close to the first plate 211. The second groove 214 is disposed corresponding to the first groove 213, and when the first plate 211 and the second plate 212 are fastened together, the first groove 213 and the second groove 214 are opposite to each other and together define a pipe slot for penetrating the cooling branch 160.
In some preferred embodiments, the first plate body 211 may be fixed to the high temperature region of the electric control plate 230 by providing a fastener or by using an adhesive, etc. The first plate 211 and the second plate 212 may be generally connected by fasteners or adhesive, etc.
The heat dissipation plate 210 adopts a plate body combining mode to form a pipe groove, which is convenient for preparation and maintenance, and is also beneficial for the connection of the heat dissipation plate 210 and the electric control plate 230.
The cross-sectional shape of the pipe groove is adapted to the shape of the cooling branch 160, so that the pipe groove of the heat dissipation plate 210 is fully contacted with the pipe wall of the cooling branch 160, and the heat conduction effect of the heat dissipation plate 210 and the cooling branch 160 is improved. Generally, the cross-sectional shape of the tube groove may be set to be circular, elliptical, square, rectangular, or the like. In the solution of the present embodiment, the cross section of the tube groove and the cross section of the cooling branch 160 are preferably arranged in a circle.
In some preferred embodiments, a heat-conducting medium such as heat-conducting silica gel may be further coated between the wall of the cooling branch 160 and the wall of the pipe slot, so as to further improve the heat exchange efficiency between the cooling branch 160 and the heat dissipation plate 210, thereby improving the heat dissipation effect of the cooling branch 160 on the heat dissipation plate 210.
The electric control board 230 is generally disposed in the electric control box 220, and the electric control box 220 is disposed at the top of the outdoor unit 20. The heat dissipation plate 210 is abutted against the bottom of the electric control plate 230. The cooling branch 160 passes through the electronic control box 220 to be connected with a refrigerating cycle line of the air conditioner.
Fig. 7 is a schematic diagram of a control method of an air conditioner cooling system according to an embodiment of the present invention. The control method of the air conditioner refrigerating system generally comprises the following steps:
in step S702, the temperature of the refrigerant at the outlet of the cooling branch 160 is obtained.
In step S704, the opening degrees of the main throttle valve 140 and the branch control valve 170 are adjusted according to the temperature of the refrigerant at the outlet of the cooling branch 160, so that the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the preset target temperature threshold.
According to the scheme of the embodiment, the opening degrees of the main throttle valve 140 and the branch control valve 170 are regulated, so that the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the preset target temperature threshold, the cooling effect of the refrigerant in the cooling branch 160 on the cooling plate 210 is ensured, and the cooling efficiency of the electric control plate 230 is further improved.
Fig. 8 is a schematic diagram of a control method of an air conditioner cooling system according to another embodiment of the present invention. The control method of the air conditioner refrigerating system generally comprises the following steps:
step S802, the temperature of the refrigerant at the outlet of the cooling branch 160 is obtained.
Step S804, the refrigerant temperature before the main throttle valve 140 throttles is obtained.
Step S806, obtaining a preset temperature compensation value. The detailed flow of performing this step may be performed according to the steps shown in fig. 9.
In step S808, the target temperature threshold is determined according to the temperature of the refrigerant before the main throttle valve 140 throttles and the temperature compensation value. Wherein the target temperature threshold is configured as a sum of the refrigerant temperature before the main throttle valve 140 throttles and the temperature compensation value.
In step S810, it is determined whether the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the target temperature threshold. If yes, go to step S812; if not, go to step S814.
In step S812, the opening degrees of the main throttle valve 140 and the bypass control valve 170 are controlled to be unchanged.
In step S814, the opening degree of the main throttle valve 140 is controlled to decrease and the opening degree of the bypass control valve 170 is controlled to increase.
In the opening adjustment process of the main throttle valve 140 and the bypass control valve 170, the refrigerant temperature at the outlet of the cooling bypass 160 is repeatedly obtained, so as to re-determine whether the refrigerant temperature at the outlet of the cooling bypass 160 is less than or equal to the target temperature threshold. That is, after step S814 is performed, the flow returns to step S802, and steps S802 to S814 are cyclically performed until it is determined that the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the target temperature threshold, and step S812 is performed, whereby the cycle is terminated.
In some preferred embodiments, after step S814 is performed, step S802 may be performed after a predetermined time interval. After the opening degrees of the main throttle valve 140 and the bypass control valve 170 are changed, an interval preset time is set, and a buffering time for enabling the temperature of the refrigerant at the outlet of the cooling bypass 160 to be gentle is given, so that data errors are reduced, and the control precision of the refrigerating system of the air conditioner is improved. Among them, the preset time may be preferably 1 minute.
The opening degree of the main throttle valve 140 is configured to be decreased by a preset first opening degree value, and the opening degree of the bypass control valve 170 is configured to be increased by a preset second opening degree value. In some preferred embodiments, the first opening value may preferably be set to 2 and the second opening value may also preferably be set to 2.
In other embodiments, the first opening value and the second opening value may also be set to 4 or 6, and the preset time may also be set to 0.5 minutes or 2 minutes, and specific values may be set according to actual requirements.
When the temperature of the refrigerant at the outlet of the cooling branch 160 is higher than the target temperature threshold, the temperature fluctuation of the refrigerant in the cooling branch 160 is too large after flowing through the heat dissipation plate 210. That is, the amount of the refrigerant in the cooling branch 160 is low, resulting in poor heat dissipation effect of the cooling branch 160 on the heat dissipation plate 210.
In the solution of this embodiment, when the temperature of the refrigerant at the outlet of the cooling branch 160 is higher than the target temperature threshold, the opening degree of the main throttle valve 140 is controlled to be reduced, and the opening degree of the branch control valve 170 is controlled to be increased, so that the amount of the refrigerant flowing through the main throttle valve 140 is reduced, and the amount of the refrigerant in the cooling branch 160 is increased, thereby improving the heat dissipation effect of the cooling branch 160 on the heat dissipation plate 210, and further improving the heat dissipation efficiency of the electric control board 230.
Further, in the solution of this embodiment, when the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the target temperature threshold, the opening degrees of the main throttle valve 140 and the branch control valve 170 are controlled to be unchanged, so that the influence of the excessively high amount of the refrigerant in the cooling branch 160 and the low amount of the refrigerant flowing through the main throttle valve 140 on the temperature adjusting function of the air conditioner is avoided.
Fig. 9 is a detailed flowchart of the step of acquiring the preset temperature compensation value in fig. 8. The step of obtaining the preset temperature compensation value comprises the following steps:
in step S902, the ambient temperature and the operation mode of the air conditioner are obtained.
Step S904, determining a temperature compensation value according to the ambient temperature and the operation mode. The detailed flow of performing this step may be performed according to the steps shown in fig. 10.
The heat dissipation requirements of the electric control board 230 on the outdoor unit 20 of the air conditioner are different in different operation modes and different ambient temperatures.
According to the scheme of the embodiment, different temperature compensation values are set according to different environmental temperatures and operation modes of the air conditioner, so that the target temperature threshold is correspondingly adjusted along with the changes of the environmental temperatures and the operation modes of the air conditioner, and the heat dissipation effect of the heat dissipation plate 210 under different circumstances is ensured.
Fig. 10 is a detailed flowchart of the step of determining a temperature compensation value according to the ambient temperature and the operation mode in fig. 9. The step of determining the temperature compensation value according to the ambient temperature and the operation mode comprises:
step S1002, it is determined whether the operation mode is a heating mode. If yes, go to step S1004; if not, go to step S1006.
In step S1004, the temperature compensation value is determined as a preset first temperature compensation value.
In step S1006, it is determined whether the ambient temperature is greater than a preset ambient temperature threshold. If yes, go to step S1008; if not, go to step S1010.
In step S1008, the temperature compensation value is determined as a preset second temperature compensation value. Wherein the second temperature compensation value is smaller than the first temperature compensation value.
In step S1010, the temperature compensation value is determined as a preset third temperature compensation value. Wherein the third temperature compensation value is smaller than the second temperature compensation value.
In some preferred embodiments, the first temperature compensation value is preferably 2.5 degrees celsius, the second temperature compensation value is preferably 1.5 degrees celsius, and the third temperature compensation value is preferably 0.5 degrees celsius.
When the air conditioner is operated in the heating mode, the temperature of the environment in which the air conditioner outdoor unit 20 is located is low, and the heat dissipation effect of the electric control board 230 is good, so that the heat dissipation requirement of the heat dissipation board 210 by using the refrigerant in the cooling branch 160 is low.
In the solution of this embodiment, the first temperature compensation value is set to be the highest, so that when the air conditioner operates in the heating mode, the refrigerant in the refrigeration system flows more to the main throttle valve 140, thereby improving the temperature adjustment effect of the air conditioner while considering the heat dissipation effect of the heat dissipation plate 210.
When the air conditioner is operated in the cooling mode, the temperature of the environment in which the outdoor unit 20 of the air conditioner is located is high, the heat dissipation effect of the electric control board 230 is poor, and heat dissipation is difficult. Therefore, the cooling demand of the heat dissipation plate 210 by the refrigerant in the cooling branch 160 is high.
In the solution of this embodiment, the second temperature compensation value and the third temperature compensation value are set to be lower than the first temperature compensation value, so that when the air conditioner operates in the refrigeration mode, the amount of the refrigerant flowing in the cooling branch 160 increases, thereby improving the heat dissipation effect of the cooling branch 160 on the heat dissipation plate 210, and further improving the heat dissipation efficiency of the electric control board 230.
When the air conditioner is operated in the cooling mode and the ambient temperature is higher than the ambient temperature threshold, the user's demand for the temperature adjustment function is higher.
According to the scheme of the embodiment, the second temperature compensation value is set to be larger than the third temperature compensation value, so that when the air conditioner operates in a refrigeration mode and the ambient temperature is higher than the ambient temperature threshold value, more refrigerant flows through the main throttle valve 140 to be throttled and cooled, the requirement of a user on a temperature adjusting function is met, and the use experience of the user is improved.
According to the scheme of the embodiment, through setting the temperature compensation values corresponding to different environment temperatures and different operation modes, the heat dissipation effect of the heat dissipation plate 210 is considered, the temperature regulation effect of the air conditioner is improved, and the use experience of a user is improved.
Fig. 11 is a schematic view of a control method of an air conditioner cooling system according to still another embodiment of the present invention. The control method of the air conditioner refrigerating system generally comprises the following steps:
in step S1102, the temperature of the refrigerant at the outlet of the cooling branch 160 is obtained.
In step S1104, the refrigerant temperature before the main throttle valve 140 throttles is acquired.
In step S1106, the ambient temperature and the operation mode of the air conditioner are acquired.
In step S1108, it is determined whether the operation mode is a heating mode. If yes, go to step S1110; if not, go to step S1112.
In step S1110, the temperature compensation value is determined as a preset first temperature compensation value.
In step S1112, it is determined whether the ambient temperature is greater than a preset ambient temperature threshold. If yes, go to step S1114; if not, go to step S1116.
In step S1114, the temperature compensation value is determined as a preset second temperature compensation value.
In step S1116, the temperature compensation value is determined as a preset third temperature compensation value.
In step S1118, a target temperature threshold is determined according to the temperature of the refrigerant before the main throttle valve 140 throttles and the temperature compensation value. The target temperature threshold is a sum of the refrigerant temperature before the main throttle valve 140 throttles and the temperature compensation value.
In step S1120, it is determined whether the temperature of the refrigerant at the outlet of the cooling branch 160 is less than or equal to the target temperature threshold. If yes, go to step S1122; if not, go to step S1124.
In step S1122, the opening degrees of the main throttle valve 140 and the bypass control valve 170 are controlled to be unchanged.
In step S1124, the opening degree of the main throttle valve 140 is controlled to decrease and the opening degree of the bypass control valve 170 is controlled to increase.
According to the scheme of the embodiment, the opening degrees of the main throttle valve 140 and the branch control valve 170 are adjusted according to the temperature of the refrigerant at the outlet of the cooling branch 160, so that the amount of the refrigerant in the cooling branch 160 is increased, the heat dissipation effect of the cooling branch 160 on the heat dissipation plate 210 is improved, and the heat dissipation efficiency of the electric control plate 230 is further improved.
Further, in the solution of the present embodiment, the target temperature threshold is determined according to the ambient temperature, the operation mode, and the refrigerant temperature before the main throttle valve 140 throttles, and by controlling the opening degrees of the main throttle valve 140 and the bypass control valve 170, the refrigerant temperature at the outlet of the cooling bypass 160 changes with the ambient temperature, the operation mode, and the refrigerant temperature before the main throttle valve 140 throttles. Therefore, the temperature of the refrigerant at the outlet of the cooling branch 160 can be always kept in a relatively proper temperature range under different circumstances, so that the heat dissipation effect of the heat dissipation plate 210 is improved, the influence of the cooling branch 160 on the temperature adjusting function of the air conditioner is reduced as much as possible, the energy consumption of the air conditioner is further saved, and the use experience of a user is greatly improved.
Fig. 12 is a schematic view of a controller 40 of an air conditioner according to an embodiment of the present invention. The air conditioner of the present embodiment is further provided with a controller 40. The controller 40 may generally include a processor 420, a memory 410. The memory 410 stores a machine executable program 411, and when the machine executable program 411 is executed by the processor 420, the machine executable program is used to implement any one of the control methods of the air conditioner refrigeration system of the present embodiment. The machine executable program 411 may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, source code written in any combination of one or more programming languages, or object code. Processor 420 may be a single core processor, a multi-core processor, a computing cluster, or any number of other configurations. Memory 410 may include Random Access Memory (RAM), read only memory, flash memory, or any other suitable storage system.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. The control method of a refrigerating system of an air conditioner, wherein, the refrigerating system includes compressor, heat exchanger of the outdoor unit, main throttle valve and heat exchanger of the indoor unit that are connected sequentially by the refrigerating cycle pipeline, wherein the both sides of the said main throttle valve connect in parallel with the cooling branch, the said cooling branch penetrates the heating panel disposed on high-temperature area of the electric control panel of the said outdoor unit of the said air conditioner, take away the heat that the said high-temperature area gives off through introducing the refrigerant of the said refrigerating system, connect in series the branch control valve on the said cooling branch, and the said control method includes:
acquiring the temperature of a refrigerant at the outlet of the cooling branch;
and adjusting the opening of the main throttle valve and the opening of the branch control valve according to the temperature of the refrigerant at the outlet of the cooling branch so that the temperature of the refrigerant at the outlet of the cooling branch is smaller than or equal to a preset target temperature threshold.
2. The control method of an air conditioner refrigerating system according to claim 1, wherein the step of adjusting the opening degrees of the main throttle valve and the branch control valve according to the refrigerant temperature at the outlet of the cooling branch comprises:
judging whether the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold;
if yes, controlling the opening degrees of the main throttle valve and the branch control valve to be unchanged;
if not, controlling the opening degree of the main throttle valve to decrease and controlling the opening degree of the branch control valve to increase until the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold.
3. The control method of an air conditioner refrigerating system according to claim 2, wherein,
and in the opening adjustment process of the main throttle valve and the branch control valve, repeatedly acquiring the temperature of the refrigerant at the outlet of the cooling branch so as to judge whether the temperature of the refrigerant at the outlet of the cooling branch is smaller than or equal to the target temperature threshold value.
4. The control method of an air conditioner cooling system according to claim 2, wherein before the step of determining whether the temperature of the refrigerant at the outlet of the cooling branch is less than or equal to the target temperature threshold, further comprising:
acquiring the temperature of the refrigerant before throttling of the main throttle valve;
acquiring a preset temperature compensation value;
determining the target temperature threshold according to the temperature of the refrigerant before throttling of the main throttle valve and the temperature compensation value; wherein the method comprises the steps of
The target temperature threshold is configured as a sum of the refrigerant temperature before throttling of the main throttle valve and the temperature compensation value.
5. The control method of an air conditioner refrigerating system as claimed in claim 4, wherein the refrigerating system further comprises a reversing valve for operating the air conditioner in a cooling mode or a heating mode by changing a flow direction of a refrigerant in the refrigerating system, the step of obtaining a preset temperature compensation value comprises:
acquiring the environment temperature and the operation mode of the air conditioner;
and determining the temperature compensation value according to the ambient temperature and the operation mode.
6. The control method of an air conditioner cooling system according to claim 5, wherein the determining the temperature compensation value according to the ambient temperature and the operation mode comprises:
judging whether the operation mode is the heating mode or not;
if yes, determining the temperature compensation value as a preset first temperature compensation value.
7. The control method of an air conditioner refrigerating system as claimed in claim 6, wherein,
when the operation mode is the refrigeration mode, judging whether the ambient temperature is greater than a preset ambient temperature threshold value;
if yes, determining the temperature compensation value as a preset second temperature compensation value; wherein the method comprises the steps of
The second temperature compensation value is less than the first temperature compensation value.
8. The control method of an air conditioner refrigerating system as claimed in claim 7, wherein,
when the ambient temperature is less than or equal to the ambient temperature threshold, determining the temperature compensation value as a preset third temperature compensation value; wherein the method comprises the steps of
The third temperature compensation value is less than the second temperature compensation value.
9. A controller, comprising:
a memory and a processor; wherein the method comprises the steps of
The memory stores a machine executable program which when executed by a processor implements the control method of the air conditioner refrigeration system according to any one of claims 1 to 8.
10. An air conditioner, comprising:
the refrigerating system comprises a compressor, a reversing valve, an outdoor unit heat exchanger, a main throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerating circulation pipeline, wherein the reversing valve enables the air conditioner to operate in a refrigerating mode or a heating mode by changing the flow direction of a refrigerant in the refrigerating system;
an outdoor unit electric control board, wherein a heat dissipation plate is arranged at a high temperature area of the outdoor unit electric control board;
the cooling branch is connected in parallel with two sides of the main throttle valve, penetrates into the heat dissipation plate, takes away heat emitted by the high-temperature area through a refrigerant introduced into the refrigerating system, and is connected with a branch control valve in series;
the controller according to claim 9.
CN202210686531.5A 2022-06-16 2022-06-16 Control method of air conditioner refrigerating system, controller and air conditioner Pending CN117287880A (en)

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CN202210686531.5A CN117287880A (en) 2022-06-16 2022-06-16 Control method of air conditioner refrigerating system, controller and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210686531.5A CN117287880A (en) 2022-06-16 2022-06-16 Control method of air conditioner refrigerating system, controller and air conditioner

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Publication Number Publication Date
CN117287880A true CN117287880A (en) 2023-12-26

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