CN118328578A - Air conditioner, control method, device and storage medium - Google Patents

Air conditioner, control method, device and storage medium Download PDF

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Publication number
CN118328578A
CN118328578A CN202310042052.4A CN202310042052A CN118328578A CN 118328578 A CN118328578 A CN 118328578A CN 202310042052 A CN202310042052 A CN 202310042052A CN 118328578 A CN118328578 A CN 118328578A
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CN
China
Prior art keywords
control valve
refrigerant
heat exchanger
air conditioner
compressor
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
CN202310042052.4A
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Chinese (zh)
Inventor
喻辉
苑洋洋
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.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment 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 GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202310042052.4A priority Critical patent/CN118328578A/en
Priority to PCT/CN2023/084465 priority patent/WO2024148685A1/en
Publication of CN118328578A publication Critical patent/CN118328578A/en
Pending legal-status Critical Current

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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
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • 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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioner, a control method, a control device and a storage medium. The first refrigerant branch is connected with a second refrigerant branch in parallel, a second control valve for controlling the on-off of the second refrigerant branch is arranged on the second refrigerant branch, and a hot gas bypass pipe for melting ice at the bottom of the outdoor heat exchanger is also arranged on the second refrigerant branch. According to the invention, by controlling the first control valve and the second control valve, the flow path of the high-temperature refrigerant discharged by the compressor can be changed, the heat supply of the hot gas bypass pipe is regulated, and further, partial heat in the refrigerant circulation process can be utilized to defrost the bottom of the outdoor heat exchanger, so that the heat source utilization rate is improved.

Description

Air conditioner, control method, device and storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioning apparatus, a control method, an apparatus, and a storage medium.
Background
At present, when an air conditioning system is in heating operation, condensed water is easy to generate on the surface of an outdoor heat exchanger, and a large amount of condensed water is accumulated on a chassis of the outdoor heat exchanger; particularly, under the low-temperature condition, the chassis condensed water can be condensed into ice, thereby affecting the normal operation of the air conditioning system. In the related art, an electric heating device is arranged on the chassis to melt the ice layer at the bottom of the outdoor heat exchanger, but the electric heating device is required to be additionally controlled, and additional electric quantity is required to be consumed. Therefore, how to perform the ice-melting operation on the bottom of the outdoor heat exchanger and also to consider the heat source utilization efficiency of the air conditioner is a technical problem to be solved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides an air conditioner, a control method, a control device and a storage medium, which realize the deicing operation of the bottom of an outdoor heat exchanger under the low-temperature condition by adjusting the heat supply of a hot gas bypass pipe, and simultaneously improve the heat utilization rate of the air conditioner.
The embodiment of the invention provides an air conditioning device,
A compressor;
the four-way valve is connected with the compressor through a first refrigerant branch, and a first control valve is arranged on the first refrigerant branch;
The indoor heat exchanger is connected with the four-way valve;
the outdoor heat exchanger is connected with the four-way valve;
The second refrigerant branch is connected with the first refrigerant branch in parallel, and a second control valve and a hot gas bypass pipe positioned at the bottom of the outdoor heat exchanger are arranged on the second refrigerant branch;
The first refrigerant port of the flash evaporator is connected to the outdoor heat exchanger, the second refrigerant port of the flash evaporator is connected to the indoor heat exchanger, and the air outlet of the flash evaporator is connected to the compressor.
The air conditioner provided by the embodiment of the invention has at least the following beneficial effects: the hot gas bypass pipe is connected in parallel between the compressor and the four-way valve, and the hot gas bypass pipe is positioned at the bottom of the outdoor heat exchanger, so that under the condition that the bottom of the outdoor heat exchanger is frozen, the high-temperature refrigerant discharged by the compressor flows to the four-way valve after passing through the hot gas bypass pipe preferentially by controlling the conduction states of the first control valve and the second control valve, namely the heat supply at the hot gas bypass pipe is increased, and the ice layer at the bottom of the outdoor heat exchanger can be melted rapidly. Because the steam bypass pipe belongs to a part of the refrigerant pipeline in the air conditioner, partial heat in the refrigerant circulation process is transferred to the steam bypass pipe for deicing, and meanwhile, the heat supply of the steam bypass pipe can be flexibly adjusted according to the running mode of the air conditioner, the heating device is not required to be additionally adopted for deicing, the heat utilization efficiency of the air conditioner is improved, and the resource waste is reduced.
In the above air conditioner, the air outlet of the flash evaporator is connected to the compressor through a third control valve.
The third control valve is controlled to control the air supplementing of the compressor, so that the air inflow of the compressor is improved under the low temperature condition, and the low temperature heating effect is improved.
In the air conditioner, a capillary tube assembly is arranged between the first refrigerant port and the outdoor heat exchanger.
The capillary tube component can throttle the refrigerant flowing out or flowing in of the outdoor heat exchanger, and improves the heat exchange effect of the refrigerant.
In the above air conditioner, an expansion valve is provided between the second refrigerant port and the indoor heat exchanger.
The expansion valve can throttle the refrigerant flowing out or flowing in of the indoor heat exchanger, the temperature and the pressure of the refrigerant are reduced, and the heat exchange effect of the refrigerant is improved.
In a second aspect, an embodiment of the present invention provides a control method for an air conditioner, which is applied to the air conditioner according to the embodiment of the first aspect, and the control method includes:
and respectively controlling the first control valve and the second control valve in response to an operation mode of the air conditioning device to adjust the heat supply amount of the hot gas bypass pipe.
The control method of the air conditioner provided by the embodiment of the invention has at least the following beneficial effects: through the operation mode of the air conditioner, the conduction states of the first control valve and the second control valve are flexibly controlled, the flow path of the refrigerant is adjusted, and the heat supply amount of the hot gas bypass pipe is changed. Under the condition that the bottom of the outdoor heat exchanger is frozen, the high-temperature refrigerant discharged by the compressor can be controlled to flow into the four-way valve through the hot gas bypass pipe in the second refrigerant bypass pipe preferentially, so that the heat supply of the hot gas bypass pipe can be improved rapidly, and the bottom of the outdoor heat exchanger is melted rapidly. Because the hot gas bypass pipe belongs to a part of the refrigerant pipeline in the air conditioner, part of heat in the refrigerant circulation process is transferred to the hot gas bypass pipe to be subjected to deicing, and a heating device is not required to be additionally adopted for deicing, the heat source use efficiency of the air conditioner is improved, and the resource waste is reduced.
In the above control method of an air conditioner, the controlling the first control valve and the second control valve in response to an operation mode of the air conditioner includes:
Acquiring an outdoor environment temperature in response to the air conditioning device operating heating mode;
And respectively controlling the first control valve and the second control valve according to the outdoor environment temperature and a preset ice condensation value.
Since the outdoor heat exchanger is easily frozen during the low-temperature heating operation, it is necessary to determine whether the air conditioner is in the low-temperature heating condition by the outdoor ambient temperature when the air conditioner is operating in the heating mode. When the low-temperature heating condition exists, the first control valve and the second control valve are required to be controlled to improve the heat supply of the hot gas bypass pipe so as to realize the deicing operation. Under the normal heating condition, the heat supply quantity of the hot gas bypass pipe is not required to be improved, and the heat supply efficiency is improved.
In the control method of the air conditioner, the first control valve is controlled to be closed and the second control valve is controlled to be conducted in response to the outdoor environment temperature being lower than a preset ice condensation value.
Under the condition that the outdoor environment temperature is lower than a preset ice condensation value, the outdoor environment temperature can be considered to be in a low-temperature heating condition, then the first control valve needs to be controlled to be closed, the second control valve is conducted, the first refrigerant branch is cut off, the high-temperature refrigerant discharged by the compressor can only enter the second refrigerant branch to pass through the hot gas bypass pipe, the heat supply of the hot gas bypass pipe is improved, and ice melting operation is realized.
In the control method of the air conditioner, the first control valve is controlled to be conducted and the second control valve is controlled to be closed in response to the outdoor environment temperature being higher than or equal to a preset ice condensation value.
Under the condition of higher outdoor environment temperature, the heating operation can not cause the outdoor heat exchanger to freeze, and the deicing operation is performed without improving the heat supply quantity of the hot gas bypass pipe, so that the high-temperature refrigerant discharged by the compressor directly flows into the four-way valve through the first refrigerant branch, the heat loss is reduced, and the heat source utilization rate is improved.
In the control method of the air conditioner, the first control valve is controlled to be conducted and the second control valve is controlled to be closed in response to the operation refrigeration mode of the air conditioner.
Under the condition of refrigeration operation, the heat supply quantity of the hot gas bypass pipe is not required to be improved to execute the deicing operation, so that the high-temperature refrigerant discharged by the compressor directly flows into the four-way valve through the first refrigerant branch, the heat loss is reduced, and the heat exchange efficiency is improved.
In the control method of the air conditioner, the first control valve is controlled to be closed and the second control valve is controlled to be conducted in response to the operation of the air conditioner in the refrigerating and defrosting mode.
Under the condition of operating the refrigerating defrosting mode, namely, the outer surface of the outdoor heat exchanger is considered to be frosted, and in order to avoid condensation of condensed water after melting of a frost layer into ice at the bottom after defrosting operation, the normal operation of the air conditioning device is influenced, a high-temperature refrigerant needs to be preferentially passed through a hot gas bypass pipe, the heat supply of the hot gas bypass pipe is improved, and the condensed water at the bottom of the outdoor heat exchanger is heated or the ice layer at the bottom of the outdoor heat exchanger is defrosted.
In the control method of the air conditioner, the air outlet of the flash evaporator is connected to the compressor through a third control valve, and the control method further includes:
controlling the third control valve to be closed in response to the air conditioning device operating in a cooling mode or a cooling defrosting mode;
and controlling the third control valve to be conducted in response to the air conditioner operating heating mode.
Under the condition that the air conditioner operates in different modes, the flowing directions of the refrigerants are different, and under the condition of heating operation, in order to improve the air inflow of the compressor, part of the refrigerants flowing out of the indoor heat exchanger are conveyed to the flash evaporator by controlling the third control valve, and after the evaporation treatment of the flash evaporator, the refrigerants are changed into gaseous refrigerants to enter the compressor, so that the heating effect is improved. Under the condition of refrigeration operation, the compressor does not need to be supplemented with air, the flash evaporator stops operating, and the liquid refrigerant is prevented from entering the compressor to cause liquid impact phenomenon by controlling the third control valve, so that the compressor is protected.
In a third aspect, an embodiment of the present invention provides an operation control device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the control method of the air conditioning device according to the embodiment of the second aspect when executing the computer program.
The operation control device provided by the embodiment of the invention has at least the following beneficial effects: through the operation mode of the air conditioner, the conduction states of the first control valve and the second control valve are flexibly controlled, the flow path of the refrigerant is adjusted, and the heat supply amount of the hot gas bypass pipe is changed. Under the condition that the bottom of the outdoor heat exchanger is frozen, the high-temperature refrigerant discharged by the compressor can be controlled to flow into the four-way valve through the hot gas bypass pipe in the second refrigerant bypass pipe preferentially, so that the heat supply of the hot gas bypass pipe can be improved rapidly, and the bottom of the outdoor heat exchanger is melted rapidly. Because the hot gas bypass pipe belongs to a part of the refrigerant pipeline in the air conditioner, part of heat in the refrigerant circulation process is transferred to the hot gas bypass pipe to be subjected to deicing, and a heating device is not required to be additionally adopted for deicing, so that the heat utilization efficiency of the air conditioner is improved, and the resource waste is reduced.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the control method of the air conditioner according to the embodiment of the second aspect.
The computer readable storage medium provided according to the embodiment of the invention has at least the following beneficial effects: through the operation mode of the air conditioner, the conduction states of the first control valve and the second control valve are flexibly controlled, the flow path of the refrigerant is adjusted, and the heat supply amount of the hot gas bypass pipe is changed. Under the condition that the bottom of the outdoor heat exchanger is frozen, the high-temperature refrigerant discharged by the compressor can be controlled to flow into the four-way valve through the hot gas bypass pipe in the second refrigerant bypass pipe preferentially, so that the heat supply of the hot gas bypass pipe can be improved rapidly, and the bottom of the outdoor heat exchanger is melted rapidly. Because the hot gas bypass pipe belongs to a part of the refrigerant pipeline in the air conditioner, part of heat in the refrigerant circulation process is transferred to the hot gas bypass pipe to be subjected to deicing, and a heating device is not required to be additionally adopted for deicing, so that the heat utilization efficiency of the air conditioner is improved, and the resource waste is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The invention is further described below with reference to the drawings and examples;
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a structural layout of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
Fig. 4 is a specific flowchart of step S101 in fig. 3;
fig. 5 is a specific flowchart of step S202 in fig. 4;
fig. 6 is a specific flowchart of step S202 in fig. 4;
fig. 7 is a specific flowchart of step S101 in fig. 3;
Fig. 8 is a specific flowchart of step S101 in fig. 3;
Fig. 9 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
Fig. 10 is a schematic structural diagram of an operation control device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
It should be appreciated that in the description of embodiments of the present invention, the descriptions of "first," "second," etc. are for the purpose of distinguishing between technical features only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. "at least one" means one or more, and "a plurality" means two or more. "at least one of the following" and the like means any combination of these items, including any combination of single or plural items.
Furthermore, unless explicitly specified and limited otherwise, the term "coupled/connected" is to be interpreted broadly, as for example, being either fixedly coupled or movably coupled, being either detachably coupled or not detachably coupled, or being integrally coupled; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium.
In the description of the embodiments of the present invention, the descriptions of the terms "one embodiment/implementation," "another embodiment/implementation," or "certain embodiments/implementations," "the above embodiments/implementations," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or examples is included in at least two embodiments or implementations of the present disclosure. In this disclosure, schematic representations of the above terms do not necessarily refer to the same illustrative embodiment or implementation. It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart.
The technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment of the invention provides an air conditioner, a control method, a control device and a storage medium. The first refrigerant branch is connected with a second refrigerant branch in parallel, a second control valve for controlling the on-off of the second refrigerant branch is arranged on the second refrigerant branch, and a hot gas bypass pipe for melting ice at the bottom of the outdoor heat exchanger is also arranged on the second refrigerant branch. Through controlling first control valve and second control valve, can change the flow path of compressor exhaust high temperature refrigerant, adjust the heat supply of steam bypass pipe, and then can utilize the partial heat in the refrigerant circulation process to carry out the deicing to outdoor heat exchanger bottom, improve heat source utilization ratio.
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
It is understood that the air conditioner includes a compressor 110, a four-way valve 120, an indoor heat exchanger 130, a hot gas bypass pipe 150, a flash evaporator 160, a first refrigerant bypass 170 and a second refrigerant bypass 180. The four-way valve 120 is connected to the inlet 113 and the outlet 111 of the compressor 110, the indoor heat exchanger 130, and the outdoor heat exchanger 140, respectively. While the first refrigerant port 161 of the flash evaporator 160 is connected to the outdoor heat exchanger 140, the second refrigerant port 162 of the flash evaporator 160 is connected to the indoor heat exchanger 130, and the gas outlet 163 of the flash evaporator 160 is connected to the gas supply port 112 of the compressor 110.
The four-way valve 120 is connected to the exhaust port 111 of the compressor 110 through a first refrigerant branch 170, and the first refrigerant branch 170 is provided with a first control valve 190 for controlling the on-off of the first refrigerant branch 170. The first refrigerant branch 170 is connected with a second refrigerant branch 180 in parallel, a second control valve 200 for controlling the on-off of the second refrigerant branch 180 is arranged on the second refrigerant branch 180, meanwhile, a hot gas bypass pipe 150 is also arranged on the second refrigerant branch 180, and the hot gas bypass pipe 150 is positioned at the bottom of the outdoor heat exchanger 140.
The air conditioner further includes a controller for controlling the first control valve 190 and the second control valve 200 according to an operation mode of the air conditioner to adjust the heat supply amount of the hot gas bypass pipe 150.
When the first control valve 190 is turned on, the high-temperature refrigerant discharged from the discharge port 111 of the compressor 110 can flow through the first refrigerant branch 170 and directly enter the four-way valve 120. While the high temperature refrigerant discharged from the compressor 110 cannot flow through the first refrigerant bypass line 170 when the first control valve 190 is closed, if the second control valve 200 is turned on, the high temperature refrigerant may enter the hot gas bypass line 150 through the second refrigerant bypass line 180, thereby increasing the heat supply of the hot gas bypass line 150, and then enter the four-way valve 120 after flowing through the second refrigerant bypass line 180.
In a low-temperature environment, condensed water formed by defrosting the surface of the outdoor heat exchanger 140 is easily condensed on the bottom of the outdoor heat exchanger 140 to form an ice layer, thereby affecting the heat exchange efficiency of the outdoor heat exchanger 140. Therefore, the ice-melting operation of the bottom of the outdoor heat exchanger 140 can be achieved by controlling the first and second control valves 190 and 200 to change the flow path of the high temperature refrigerant discharged from the compressor 110, adjust the heat supply amount of the hot gas bypass pipe 150, and the like. Meanwhile, since the hot gas bypass pipe 150 in the second refrigerant bypass 180 belongs to a part of the cooling pipeline in the air conditioner, the first control valve 190 and the second control valve 200 are adjusted to only change whether the high-temperature refrigerant passes through the hot gas bypass pipe 150, that is, only part of heat in the refrigerant circulation process of the air conditioner is used for carrying out the deicing operation, no additional heating device is needed, the heat source utilization rate of the air conditioner is improved, and the resource waste is reduced.
It should be noted that, the compressor 110 is an enhanced vapor injection compressor, and the enhanced vapor injection compressor includes a gas supplementing port 112 in addition to a gas outlet 163 and a gas inlet 113, compared to a conventional compressor. The flash evaporator 160 can evaporate part of the refrigerant flowing in and separate the gaseous refrigerant to be conveyed to the air compensating port 112, and the jet enthalpy increasing compressor can perform mixed compression on the refrigerant in the cavity and the refrigerant input from the air compensating port 112, and can be regarded as one-time throttling operation, so that compared with the refrigerant circulation process of the traditional compressor, the refrigerant circulation of the jet enthalpy increasing compressor has more throttling operation, and can reduce the exhaust temperature, thereby realizing low-temperature stable operation. The flash evaporator 160 can separate a gaseous refrigerant and a liquid refrigerant, the gaseous refrigerant is delivered to the air compensating port 112 through the air outlet 163, and the liquid refrigerant flows out from the first refrigerant port 161, so as to continue refrigerant circulation.
Referring to fig. 2, fig. 2 is a schematic structural layout of an air conditioner. The compressor 110 and the outdoor heat exchanger 140 in the air conditioner may be integrated as an outdoor unit 320 installed in an outdoor wall or a window sill, and the indoor heat exchanger 130, the water pump 321 and the fan 322 are integrated as an indoor unit 310 installed indoors. The indoor unit 310 and the outdoor unit 320 are connected by a refrigerant pipe, so that heat exchange between the indoor and outdoor units can be performed by the refrigerant, the compressor 110 drives the refrigerant to circulate in the refrigerant pipe, and the water pump 321 assists the refrigerant to circulate between the indoor unit 310 and the outdoor unit 320. The indoor unit 310 supplies cold or heat to the indoor through the indoor heat exchanger 130, the blower 322 can assist in supplying cold or heat to the indoor, and the outdoor unit 320 radiates or absorbs heat to the outdoor through the outdoor heat exchanger 140.
When the air conditioner operates in the heating mode, frost may be formed on the outdoor heat exchanger 140, and the air conditioner melts the frost layer on the surface of the outdoor heat exchanger 140 through the defrosting operation, so that the bottom of the outdoor heat exchanger 140 is provided with the water receiving tray 311, the water receiving tray 311 is further provided with a drain hole, and the water receiving tray 311 is used for receiving water formed after the frost layer on the surface of the outdoor heat exchanger 140 is defrosted, and then water is discharged through the drain hole.
In the low-temperature environment, the defrosted water is condensed into ice in the water receiving tray 311, so that the drain hole is blocked, and the operation of the air conditioner is affected. Therefore, the hot gas bypass pipe 150 may be disposed at the bottom of the water receiving tray 311, i.e., the outdoor heat exchanger 140, and in case that the water receiving tray 311 is frozen, the first control valve 190 and the second control valve 200 in the air conditioner may be controlled such that the high temperature refrigerant flows through the hot gas bypass pipe 150, melts the ice in the water receiving tray 311 into water, and is conveniently discharged through the drain hole.
It is understood that a third control valve 210 is connected between the outlet 163 of the flash evaporator 160 and the air supply port 112 of the compressor 110. In the case of the heating operation of the air conditioner, after the refrigerant flowing out of the indoor heat exchanger 130 passes through the flash evaporator 160, part of the refrigerant is changed into a gaseous refrigerant under the evaporation action of the flash evaporator 160, so that the gaseous refrigerant can enter the compressor 110 to be supplemented by controlling the third control valve 210 to be conducted, thereby improving the air inflow of the compressor 110 and the efficiency of the compressor 110. Meanwhile, in the case of the cooling operation of the air conditioner, the flash evaporator 160 is in a closed state, i.e., the entering refrigerant is not evaporated, so that the liquid refrigerant is easily introduced into the compressor 110 through the air outlet 163 of the flash evaporator 160, causing a liquid impact phenomenon, and damaging the compressor 110. Therefore, when the air conditioner is in the cooling operation, the third control valve 210 may be controlled to be closed, so that the refrigerant cannot enter the compressor 110 through the air outlet 163 of the flash evaporator 160, thereby improving the protection of the compressor 110.
It can be understood that the capillary tube assembly 220 is connected between the first refrigerant port 161 of the flash evaporator 160 and the outdoor heat exchanger 140, and the expansion valve 230 is connected between the second refrigerant port 162 of the flash evaporator 160 and the indoor heat exchanger 130, and the capillary tube assembly 220 and the expansion valve 230 can throttle the refrigerant flowing through, so as to reduce the temperature and pressure of the refrigerant, facilitate subsequent heat exchange, and improve the heat exchange efficiency.
The air conditioning system described in the embodiments of the present invention is for more clearly describing the technical solution of the embodiments of the present invention, and does not constitute a limitation to the technical solution provided in the embodiments of the present invention, and as a person skilled in the art can know that, with the evolution of the air conditioning apparatus and the appearance of a new application scenario, the technical solution provided in the embodiments of the present invention is applicable to similar technical problems.
It will be appreciated by those skilled in the art that the configuration of the air conditioning apparatus shown in fig. 1 or 2 is not limiting of the embodiments of the present invention and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
Based on the structure of the air conditioner, various embodiments of the control method of the air conditioner of the present invention are presented.
Referring to fig. 3, fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention, and the flowchart of the control method of the air conditioner may be applied to the air conditioner shown in fig. 1 or fig. 2, and the flowchart of the control method of the air conditioner includes, but is not limited to, the following steps:
Step S101, respectively controlling a first control valve and a second control valve to adjust the heat supply amount of the hot gas bypass pipe in response to the operation mode of the air conditioner.
It can be understood that by controlling the first control valve and the second control valve, the on-off condition of the two refrigerant flow paths from the compressor exhaust port to the four-way valve of the first refrigerant branch and the second refrigerant branch can be changed. Under the condition that the first control valve is conducted, the high-temperature refrigerant discharged from the exhaust port of the compressor can enter the four-way valve through the first refrigerant branch, and the first refrigerant branch is only provided with the first control valve, which is equivalent to that the high-temperature refrigerant directly flows into the four-way valve from the exhaust port of the compressor, and heat exchange is not carried out on the device. And under the condition that the second control valve is conducted, the second refrigerant branch flows, the high-temperature refrigerant can enter the four-way valve from the exhaust port of the compressor through the second refrigerant branch, and the second control valve and the hot gas bypass pipe are arranged on the second refrigerant branch. The hot gas bypass pipe is positioned at the bottom of the outdoor heat exchanger, so that when a high-temperature refrigerant flows through the second refrigerant branch, namely flows through the hot gas bypass pipe, the heat supply quantity of the hot gas bypass pipe is improved, the temperature of the bottom of the outdoor heat exchanger is increased, and therefore, an ice layer at the bottom of the outdoor heat exchanger can be quickly melted.
Under the condition of heating operation of the air conditioner, condensed water is easy to generate on the surface of the outdoor heat exchanger, and can flow to the bottom of the outdoor heat exchanger, and under the low-temperature environment, the condensed water at the bottom of the outdoor heat exchanger is easy to condense into ice, so that the normal operation of the outdoor heat exchanger is affected. In addition, the surface of the outdoor heat exchanger is easy to frost in a low-temperature environment, and condensed water formed by defrosting is accumulated at the bottom of the outdoor heat exchanger after the air conditioner performs refrigerating defrosting operation, so that the risk that the operation of the air conditioner is influenced by the condensed ice layer is caused. Therefore, the first control valve and the second control valve can be controlled according to the operation mode of the air conditioner, which is equivalent to the situation that the bottom of the outdoor heat exchanger has the risk of ice condensation, the first control valve and the second control valve can be controlled to improve the heat supply quantity of the hot gas bypass pipe, part of heat in the refrigerant circulation is utilized to quickly melt the ice layer at the bottom of the outdoor heat exchanger, and the heat supply quantity of the hot gas bypass pipe is adjusted without ice melting operation under the situation that the bottom of the outdoor heat exchanger has no risk of ice condensation, thereby improving the operation efficiency of the air conditioner, saving heat sources and improving the heat source utilization rate.
It should be noted that, the first control valve and the second control valve may be opened simultaneously, so that a portion of the high-temperature refrigerant discharged from the compressor may directly enter the four-way valve, and another portion of the high-temperature refrigerant may first flow through the hot gas bypass pipe and then enter the four-way valve, so as to provide a portion of heat for the hot gas bypass pipe. The first control valve and the second control valve can be independently opened, namely, only one control valve is in a conducting state in the same time, so that a high-temperature refrigerant can only pass through the hot gas bypass pipe or completely does not pass through the hot gas bypass pipe, the heat supply of the hot gas bypass pipe is rapidly improved, or the heat supply of the hot gas bypass pipe is completely stopped, the flexible adjustment of the heat supply of the hot gas bypass pipe is realized, and the heat source utilization rate is improved.
Referring to fig. 4, fig. 4 is a specific flowchart of step S101 in fig. 3, and in the example of fig. 4, step S101 includes, but is not limited to, the following steps:
Step S201, responding to an air conditioner operation heating mode, and acquiring outdoor environment temperature;
step S202, respectively controlling a first control valve and a second control valve according to the outdoor environment temperature and a preset ice condensation value.
It can be appreciated that in the heating mode of operation of the air conditioning apparatus, it is necessary to further determine whether there is a risk of ice condensation at the bottom of the outdoor heat exchanger by the outdoor ambient temperature and the preset ice condensation value. Under the condition that the outdoor environment temperature is higher, namely the preset freezing value is not met, the bottom of the outdoor heat exchanger can be considered to be free of freezing, so that the second refrigerant branch does not need to be started, the high-temperature refrigerant flows through the hot gas bypass pipe to be frozen, and a heat source is saved. And under the lower circumstances of outdoor ambient temperature, satisfy promptly and predetermine the ice, then can consider that the outdoor heat exchanger bottom appears freezing phenomenon easily, there is the ice risk, consequently, need open the second refrigerant branch road, can close first refrigerant branch road simultaneously, make high temperature refrigerant only flow through the second refrigerant branch road, improve the heat supply of steam bypass pipe fast, utilize the steam bypass pipe to heat the outdoor heat exchanger bottom, play the effect of deicing outdoor heat exchanger bottom, simultaneously, heat up the outdoor heat exchanger bottom, can prevent effectively that the outdoor heat exchanger from freezing again in the short time, and frequent the operation of deicing.
Referring to fig. 5, fig. 5 is a specific flowchart of step S202 in fig. 4, and in the example of fig. 5, step S202 includes, but is not limited to, the following steps:
in step S301, the first control valve is controlled to be closed and the second control valve is controlled to be turned on in response to the outdoor ambient temperature being lower than the preset ice condensation value.
It can be understood that when the outdoor heat exchange temperature is lower than the preset ice condensation value, the air conditioner is considered to be in a low-temperature environment operation heating mode, and the bottom of the outdoor heat exchanger is easy to generate ice, so that the heat supply quantity of the hot gas bypass pipe needs to be improved to ice the bottom of the outdoor heat exchanger, namely, the first control valve is controlled to be closed, the second control valve is controlled to be conducted, the first refrigerant branch is cut off, and the second refrigerant branch is circulated. Therefore, the high-temperature refrigerant discharged from the exhaust port of the compressor cannot directly enter the four-way valve through the first refrigerant branch, and must enter the four-way valve after passing through the hot gas bypass pipe in the second refrigerant branch, and the temperature of the hot gas bypass pipe can be quickly increased by the hot gas bypass pipe, so that quick deicing is realized. The preset ice condensation value can be a preset fixed temperature value, or a temperature value calculated according to the current outdoor environment temperature and the current outdoor environment humidity.
Referring to fig. 6, fig. 6 is a specific flowchart of step S202 in fig. 4, and in the example of fig. 6, step S202 includes, but is not limited to, the following steps:
and step S401, in response to the outdoor environment temperature being higher than or equal to a preset freezing value, controlling the first control valve to be conducted and controlling the second control valve to be closed.
It can be understood that under the condition that the outdoor ambient temperature is higher than or equal to the preset ice condensation value, the air conditioner can be considered to operate the heating mode without ice condensation risk, namely without melting ice and without supplying heat to the hot gas bypass pipe, so that the first control valve can be controlled to be conducted, the second control valve is controlled to be closed, the first refrigerant branch is circulated, and the second refrigerant branch is cut off. Therefore, the high-temperature refrigerant discharged from the exhaust port of the compressor cannot flow through the second refrigerant branch to the four-way valve, namely, the heat supply of the hot gas bypass pipe cannot be improved, and the hot gas bypass pipe can only directly enter the four-way valve through the first refrigerant branch, so that heat exchange in the refrigerant circulation process is equivalent to the heating of the hot gas bypass pipe, the hot gas bypass pipe does not need to be heated, and compared with the scheme that the high-temperature refrigerant always flows through the hot gas bypass pipe to keep heating the hot gas bypass pipe, the heat loss of the refrigerant can be reduced, and the heating efficiency is improved.
It should be noted that, under the heating mode of the air conditioner, the outdoor ambient temperature can be periodically obtained, so that whether the outdoor heat exchanger has the ice condensation risk can be periodically judged, and then the first control valve and the second control valve are adjusted to change the heat supply of the hot gas bypass pipe, and the bottom of the outdoor heat exchanger is subjected to ice melting and heating operation. For example, when the first control valve is controlled to be closed and the second control valve is controlled to be opened, namely, the air conditioner performs ice melting operation, and when the outdoor ambient temperature is higher than or equal to a preset ice melting value, the current air conditioner can be considered to have no ice melting risk, the ice melting operation is not required to be continuously performed, the first control valve is controlled to be opened, the second control valve is closed, high-temperature refrigerant is directly supplied to the four-way valve, and heat loss is reduced.
Referring to fig. 7, fig. 7 is a specific flowchart of step S101 in fig. 3, and in the example of fig. 7, step S101 includes, but is not limited to, the following steps:
in step S501, in response to the air conditioning apparatus operating in the cooling mode, the first control valve is controlled to be turned on, and the second control valve is controlled to be turned off.
It can be understood that the air conditioner operates in the refrigeration mode, the refrigerant flowing through the outdoor heat exchanger is in a low-temperature state, and the bottom of the outdoor heat exchanger can be considered to have no ice condensation risk, so that heat is not required to be supplied to the hot gas bypass pipe, the first control valve can be controlled to be conducted, the second control valve is controlled to be closed at the same time, the high-temperature refrigerant exhausted from the exhaust port of the compressor can only flow into the four-way valve through the first refrigerant branch and cannot enter the four-way valve through the second refrigerant branch, which is equivalent to that the refrigerant cannot flow through the hot gas bypass pipe, the heat supply of the hot gas bypass pipe cannot be improved, and the high-temperature refrigerant directly enters the four-way valve, so that heat loss is reduced. Therefore, the first control valve and the second control valve can be flexibly adjusted according to whether the bottom of the outdoor heat exchanger has the ice condensation risk or not, the heat supply amount of the hot gas bypass pipe is changed, and the heat source utilization rate is improved.
Referring to fig. 8, fig. 8 is a specific flowchart of step S101 in fig. 3, and in the example of fig. 8, step S101 includes, but is not limited to, the following steps:
In step S601, in response to the air conditioning apparatus operating in the cooling defrosting mode, the first control valve is controlled to be closed, and the second control valve is controlled to be turned on.
It can be understood that under the condition that the air conditioner operates in the refrigerating defrosting mode, the current outdoor environment temperature is considered to be low, namely, the current outdoor environment temperature is in a low-temperature environment, and the surface of the current outdoor heat exchanger is frosted, defrosting operation is required, the high-temperature refrigerant flows through the outdoor heat exchanger preferentially to exchange heat and then flows to the indoor heat exchanger, the temperature of the outdoor heat exchanger is increased, and the frost layer on the surface of the outdoor heat exchanger is melted. And the condensed water after defrosting can flow to the bottom of the outdoor heat exchanger, and under the low-temperature environment, the condensed water is easy to condense into ice at the bottom of the outdoor heat exchanger, so that the risk of ice condensation exists at the bottom of the outdoor heat exchanger, the heat supply quantity of the hot gas bypass pipe needs to be improved, the condensed water at the bottom of the outdoor heat exchanger is heated, and the ice is prevented.
Therefore, under the condition that the air conditioner operates in a refrigerating defrosting mode, the first control valve is controlled to be closed, the second control valve is controlled to be conducted, and the heat supply of the hot gas bypass pipe is improved, so that the deicing heating operation is realized.
Referring to fig. 9, fig. 9 is a specific flowchart of a control method of an air conditioner according to another embodiment of the present invention, and in the example of fig. 9, the control method further includes, but is not limited to, the following steps:
Step S701, responding to the air conditioner to operate in a refrigeration mode or a refrigeration defrosting mode, and controlling a third control valve to be closed;
in step S702, in response to the air conditioner operating heating mode, the third control valve is controlled to be turned on.
It is understood that a third control valve is connected between the air outlet of the flash evaporator and the air supplementing port of the compressor. Under the condition of heating operation of the air conditioner, after the refrigerant flowing out of the indoor heat exchanger passes through the flash evaporator, part of the refrigerant is changed into a gaseous refrigerant under the evaporation action of the flash evaporator, so that the third control valve can be controlled to be conducted under the heating mode of the air conditioner, and the gaseous refrigerant can enter the compressor to be supplemented with air, thereby improving the air inflow of the compressor and the efficiency of the compressor.
In addition, under the condition of refrigerating operation of the air conditioner, the flash evaporator is in a closed state, namely, the entering refrigerant is not evaporated, so that the liquid refrigerant is easy to enter the compressor through the air outlet of the flash evaporator, and the liquid impact phenomenon is caused to damage the compressor. Therefore, when the air conditioner is in the refrigeration operation, namely the air conditioner is in the refrigeration mode or the refrigeration defrosting mode, the third control valve can be controlled to be closed, so that the refrigerant cannot enter the compressor through the air outlet of the flash evaporator, and the protection of the compressor is improved.
Through the steps, under the condition of refrigerating operation or heating operation of the air conditioner, the first control valve can be controlled to be closed and the second control valve can be controlled to be conducted, so that high-temperature refrigerant is discharged from the exhaust port of the compressor, flows through the hot gas bypass pipe and then enters the four-way valve, namely, no matter whether the air conditioner operates in any mode, the refrigerant flow path between the compressor and the four-way valve can be adjusted by controlling the first control valve and the second control valve, the heat supply quantity of the hot gas bypass pipe is adjusted, the hot gas bypass pipe belongs to a part of the refrigerant circulation path, namely, the deicing operation is realized by utilizing part of heat in the refrigerant circulation process, and the heat source utilization rate is improved.
The air conditioner and the control method of the present application will be described below by way of a specific example.
Example one
Referring to a construction diagram of the air conditioner of fig. 1. A first control valve is arranged on a first refrigerant branch line between an exhaust port of the compressor and the four-way valve, a second refrigerant branch line is connected in parallel on the first refrigerant branch line, and a second control valve and a hot gas bypass pipe positioned at the bottom of the outdoor heat exchanger are arranged on the second refrigerant branch line. The air outlet of the flash evaporator is connected to the air supplementing port of the compressor through an enthalpy spraying pipeline, and a third control valve is arranged on the enthalpy spraying pipeline.
Cooling mode operation:
When the air conditioner operates in a refrigerating mode, the first control valve is conducted, the second control valve is closed, the third control valve is closed, after the refrigerant is discharged from the exhaust port of the compressor, the refrigerant enters the four-way valve through the first refrigerant branch, and at the moment, the second refrigerant branch does not circulate the refrigerant, namely the hot gas bypass pipe does not circulate the refrigerant. The refrigerant flows through the four-way valve and then enters the outdoor heat exchanger to exchange heat, and the refrigerant flowing out of the outdoor heat exchanger is throttled through the capillary tube component and the expansion valve, wherein the refrigerant can pass through the flash evaporator in a closed state, and the refrigerant can directly pass through the first refrigerant port to the second refrigerant port of the flash evaporator. And the throttled refrigerant with low temperature and low pressure enters the indoor heat exchanger to exchange heat, and finally returns to the air inlet of the compressor through the four-way valve.
Heating mode operation:
When the air conditioner operates in the heating mode, it is necessary to determine whether the outdoor ambient temperature is lower than a preset ice condensation value, which may be 5 ℃. When the outdoor ambient temperature is higher than or equal to 5 ℃, the bottom of the outdoor heat exchanger can be considered to be free from icing, high-temperature refrigerants are not required to flow through the hot gas bypass pipe, namely, the heat supply of the hot gas bypass pipe is not required to be improved for deicing. I.e. the first control valve is on, the second control valve is closed and the third control valve is on. After the high-temperature refrigerant is discharged from the exhaust port of the compressor, the second refrigerant branch cannot circulate, and only the first refrigerant branch can be utilized to enter the four-way valve. After flowing through the four-way valve, the refrigerant enters the indoor heat exchanger for heat exchange, the refrigerant flowing out of the indoor heat exchanger enters the expansion valve for throttling, and the throttled refrigerant enters the flash evaporator. The refrigerant evaporates in the flash evaporator and separates gas and liquid, the gaseous refrigerant is discharged through the air outlet, and enters the air supplementing port of the compressor through the third control valve. The liquid refrigerant flows out through the first refrigerant port of the flash evaporator and is throttled by the capillary tube assembly. And the refrigerant after secondary throttling enters an outdoor heat exchanger to exchange heat, and finally returns to the air inlet of the compressor through the four-way valve.
When the outdoor ambient temperature is lower than 5 ℃, it is considered that the bottom of the outdoor heat exchanger is frozen, and therefore, the heat supply of the hot gas bypass pipe needs to be increased to perform ice melting. At this time, the first control valve is closed, the second control valve is turned on, and the third control valve is turned on. After the high-temperature refrigerant is discharged from the exhaust port of the compressor, the first refrigerant branch cannot circulate because the first control valve is closed, the high-temperature refrigerant can only enter the second refrigerant branch and flow through the hot gas bypass pipe to heat and defrost the bottom of the outdoor heat exchanger. And the refrigerant flowing out of the hot gas bypass pipe enters the four-way valve and then flows into the indoor heat exchanger for heat exchange. The refrigerant after heat exchange sequentially passes through an expansion valve, a flash evaporator, a capillary tube component, an outdoor heat exchanger and a four-way valve, and finally enters an air inlet of the compressor. The refrigerant is evaporated and gas-liquid separated after flowing through the flash evaporator, the gaseous refrigerant enters the air supplementing port of the compressor through the air outlet and the third control valve, and the liquid refrigerant enters the outdoor heat exchanger through the first refrigerant port.
Refrigeration defrosting mode operation:
When the air conditioner operates in the cooling defrosting mode, it is considered that not only the defrosting operation is required for the surface of the outdoor heat exchanger, but also the heating treatment is required for the condensed water after defrosting, and the defrosting treatment is required for the bottom of the outdoor heat exchanger. Thus, it is necessary to control the first control valve to close, the second control valve to conduct, and the third control valve to close. The high-temperature refrigerant discharged from the exhaust port of the compressor cannot pass through the first refrigerant branch, can only enter the second refrigerant branch, flows through the hot gas bypass pipe, and flows into the four-way valve after the heat supply of the hot gas bypass pipe is improved. And the heat enters an outdoor heat exchanger to exchange heat after passing through the four-way valve. The refrigerant after heat exchange is throttled by the capillary tube component and the expansion valve and then becomes low-temperature and low-pressure refrigerant, and enters the indoor heat exchanger for heat exchange. And the refrigerant after heat exchange returns to the air inlet of the compressor through the four-way valve.
Referring to fig. 10, fig. 10 is a schematic structural diagram of an operation control device 1000 according to a third aspect of the present invention, where the operation control device 1000 includes: the air conditioner control device according to the above embodiment includes a memory 1010, a processor 1020, and a computer program stored in the memory 1010 and executable on the processor 1020, wherein the processor 1020 executes the computer program.
The memory 1010 is used as a non-transitory computer readable storage medium for storing a non-transitory software program and a non-transitory computer executable program, such as the control method of the air conditioner according to the above-described embodiment of the present invention. The processor 1020 implements the control method of the air conditioner in the above-described embodiment of the present invention by running a non-transitory software program and instructions stored in the memory 1010.
Memory 1010 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data and the like necessary for performing the control method of the air conditioner in the above-described embodiment. In addition, the memory 1010 may include high-speed random access memory 1010, and may also include non-transitory memory 1010, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. It should be noted that the memory 1010 may alternatively include a memory 1010 provided remotely from the processor 1020, and that these remote memories 1010 may be connected to the terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
A non-transitory software program and instructions required to implement the control method of the air conditioner in the above-described embodiments are stored in the memory, and when executed by the one or more processors, the control method of the air conditioner in the above-described embodiments is performed, for example, the method step S101 in fig. 3, the method steps S201 to S202 in fig. 4, the method step S301 in fig. 5, the method step S401 in fig. 6, the method step S501 in fig. 7, the method step S601 in fig. 8, and the method step S701 to S702 in fig. 9 described above are performed.
A fourth aspect embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions that can be used to cause a computer to perform the control method of an air conditioner according to the second aspect embodiment as described above, for example, the method step S101 in fig. 3, the method steps S201 to S202 in fig. 4, the method step S301 in fig. 5, the method step S401 in fig. 6, the method step S501 in fig. 7, the method step S601 in fig. 8, and the method steps S701 to S702 in fig. 9, which are described above.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by the computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (13)

1. An air conditioning apparatus, comprising:
A compressor;
the four-way valve is connected with the compressor through a first refrigerant branch, and a first control valve is arranged on the first refrigerant branch;
The indoor heat exchanger is connected with the four-way valve;
the outdoor heat exchanger is connected with the four-way valve;
The second refrigerant branch is connected with the first refrigerant branch in parallel, and a second control valve and a hot gas bypass pipe positioned at the bottom of the outdoor heat exchanger are arranged on the second refrigerant branch;
The first refrigerant port of the flash evaporator is connected to the outdoor heat exchanger, the second refrigerant port of the flash evaporator is connected to the indoor heat exchanger, and the air outlet of the flash evaporator is connected to the compressor.
2. An air conditioning unit according to claim 1, wherein the air outlet of the flash evaporator is connected to the compressor by a third control valve.
3. The air conditioner according to claim 1, wherein a capillary tube assembly is provided between the first refrigerant port and the outdoor heat exchanger.
4. The air conditioner according to claim 1, wherein an expansion valve is provided between the second refrigerant port and the indoor heat exchanger.
5. A control method of an air conditioner, characterized by being applied to the air conditioner according to any one of claims 1 to 4, comprising:
and respectively controlling the first control valve and the second control valve in response to an operation mode of the air conditioning device to adjust the heat supply amount of the hot gas bypass pipe.
6. The control method according to claim 5, wherein the controlling the first control valve and the second control valve, respectively, in response to the operation mode of the air conditioning apparatus includes:
Acquiring an outdoor environment temperature in response to the air conditioning device operating heating mode;
And respectively controlling the first control valve and the second control valve according to the outdoor environment temperature and a preset ice condensation value.
7. The control method of claim 6, wherein the first control valve is controlled to be closed and the second control valve is controlled to be turned on in response to the outdoor ambient temperature being lower than a preset ice condensation value.
8. The control method of claim 6, wherein the first control valve is controlled to be turned on and the second control valve is controlled to be turned off in response to the outdoor ambient temperature being higher than or equal to a preset ice condensation value.
9. The control method of claim 5, wherein the first control valve is controlled to be turned on and the second control valve is controlled to be turned off in response to the air conditioning apparatus operating in a cooling mode.
10. The control method of claim 5, wherein the first control valve is controlled to be closed and the second control valve is controlled to be turned on in response to the air conditioning apparatus operating in a cooling defrosting mode.
11. The control method according to claim 5, wherein an air outlet of the flash evaporator is connected to the compressor through a third control valve, the control method further comprising:
controlling the third control valve to be closed in response to the air conditioning device operating in a cooling mode or a cooling defrosting mode;
and controlling the third control valve to be conducted in response to the air conditioner operating heating mode.
12. An operation control device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the control method of an air conditioner according to any one of claims 5 to 11 when executing the computer program.
13. A computer-readable storage medium storing computer-executable instructions for causing a computer to execute the control method of the air conditioner according to any one of claims 5 to 11.
CN202310042052.4A 2023-01-12 2023-01-12 Air conditioner, control method, device and storage medium Pending CN118328578A (en)

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JP2009210174A (en) * 2008-03-04 2009-09-17 Sharp Corp Air conditioner
US9958194B2 (en) * 2011-10-03 2018-05-01 Mitsubishi Electric Corporation Refrigeration cycle apparatus with a heating unit for melting frost occurring in a heat exchanger
CN203687233U (en) * 2013-09-27 2014-07-02 广东美的暖通设备有限公司 Air-conditioning outdoor unit and air-conditioning system with same
CN109269040B (en) * 2018-08-10 2019-12-31 珠海格力电器股份有限公司 Air conditioner control system and control method
CN109990429B (en) * 2019-03-15 2021-04-09 奥克斯空调股份有限公司 Air conditioner defrosting control method and air conditioner
CN212108755U (en) * 2020-04-30 2020-12-08 Tcl空调器(中山)有限公司 Chassis deicing structure of air conditioner, outdoor unit and air conditioner
CN111692708B (en) * 2020-06-16 2024-04-05 珠海格力节能环保制冷技术研究中心有限公司 Air conditioning system with frosting inhibition function and frosting inhibition control method

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