CN114688631A - Air conditioning system, defrosting method of air conditioning system, and computer-readable storage medium - Google Patents
Air conditioning system, defrosting method of air conditioning system, and computer-readable storage medium Download PDFInfo
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- CN114688631A CN114688631A CN202011644560.2A CN202011644560A CN114688631A CN 114688631 A CN114688631 A CN 114688631A CN 202011644560 A CN202011644560 A CN 202011644560A CN 114688631 A CN114688631 A CN 114688631A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 95
- 238000010257 thawing Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims description 28
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 description 29
- 230000000694 effects Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 206010016326 Feeling cold Diseases 0.000 description 1
- 206010016334 Feeling hot Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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- 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
- F24F11/67—Switching between heating and cooling modes
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- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system, a defrosting method of the air conditioning system and a computer readable storage medium, wherein the air conditioning system comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first indoor fan, a second indoor fan, a first throttling element, a second throttling element and a connecting pipeline; the reversing device enables the outdoor heat exchanger to be communicated with the exhaust port of the compressor and enables the second indoor heat exchanger to be communicated with the air suction port of the compressor in the first switching state; when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air. The air conditioning system can effectively weaken the cold feeling brought to the user during defrosting, and improves the use comfort of the user.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioning system, a defrosting method for an air conditioning system, and a computer-readable storage medium.
Background
An air conditioner is a common household appliance. When the air conditioner runs in a heating mode in winter, the surface temperature of the outdoor heat exchanger is reduced because the refrigerant evaporates and absorbs heat in the outdoor heat exchanger. If the air conditioner continues to operate in the heating mode when the outdoor temperature is extremely low, a large amount of frost may be condensed on the surface of the outdoor heat exchanger, thereby affecting the normal operation of the air conditioner.
The existing air conditioner switches the air conditioner into a refrigeration mode when defrosting, although the defrosting method can remove frost on an outdoor heat exchanger, in the defrosting process, an indoor fan does not operate, so that obvious cold feeling is brought to a user, the user feels obvious cold and hot difference, and the using comfort of the user is poor.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
Disclosure of Invention
The invention mainly aims to provide an air conditioning system, and aims to solve the technical problem that the conventional air conditioning system brings obvious cold feeling to a user when defrosting is carried out.
In order to achieve the above object, the present invention provides an air conditioning system, which includes a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first indoor fan, a second indoor fan, a first throttling element, a second throttling element, and a connecting pipeline, wherein the connecting pipeline sequentially connects the outdoor heat exchanger, the first throttling element, the first indoor heat exchanger, the second throttling element, and the second indoor heat exchanger;
the air conditioning system further comprises a reversing device, wherein the reversing device has a first switching state and a second switching state, and in the first switching state, the reversing device enables the outdoor heat exchanger to be communicated with the air outlet of the compressor and enables the second indoor heat exchanger to be communicated with the air suction port of the compressor; in the second switching state, the reversing device enables the outdoor heat exchanger to be communicated with the air suction port of the compressor, and enables the second indoor heat exchanger to be communicated with the air exhaust port of the compressor;
when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air.
In an embodiment, the second predetermined opening degree is smaller than the first predetermined opening degree.
In an embodiment, the first preset opening degree is a maximum opening degree of the first throttling element.
In one embodiment, the air conditioning system further comprises an indoor machine shell, the indoor machine shell is provided with a first air duct for installing the first indoor heat exchanger and a second air duct for installing the second indoor heat exchanger, and air blown out from the first air duct is located at the upper layer of air blown out from the second air duct;
when the air conditioning system is in a heating mode, the reversing device is in the second switching state, the first indoor fan and the second indoor fan are in an opening state, the first throttling element is adjusted to a third preset opening degree, the second throttling element is adjusted to a fourth preset opening degree, so that the first air channel and the second air channel all blow off hot air, and the temperature of the air blown off by the first air channel is smaller than that of the air blown off by the second air channel.
In an embodiment, the third predetermined opening degree is smaller than the fourth predetermined opening degree.
In an embodiment, a rotation speed of the first indoor fan in the heating mode is greater than a rotation speed of the first indoor fan in the defrosting mode.
The invention also provides a defrosting method of the air conditioning system, which comprises the following steps:
acquiring frosting state information of the outdoor heat exchanger;
determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition, and controlling the air conditioning system to enter a defrosting mode;
when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air.
In an embodiment, before the step of controlling the air conditioning system to enter the defrosting mode, the method further includes:
and controlling the frequency of the compressor to be reduced to a first preset frequency, and operating for a first preset time.
In an embodiment, after the step of controlling the frequency of the compressor to decrease to the first preset frequency, the method further includes:
and controlling the rotating speed of the first indoor fan to be reduced to a first preset rotating speed, and controlling the rotating speed of the second indoor fan to be reduced to a second preset rotating speed.
In an embodiment, after the step of controlling the air conditioning system to enter the defrosting mode, the method further includes:
controlling the frequency of the compressor to rise to a second preset frequency.
In an embodiment, after the step of determining that the frosting status information of the outdoor heat exchanger meets a preset defrosting condition and controlling the air conditioning system to enter a defrosting mode, the method further includes:
determining that the frosting state information of the outdoor heat exchanger meets the condition of exiting defrosting, and controlling the air-conditioning system to enter a heating mode;
when the air conditioning system is in a heating mode, the reversing device is in the second switching state, the first indoor fan and the second indoor fan are in an opening state, the first throttling element is adjusted to a third preset opening degree, the second throttling element is adjusted to a fourth preset opening degree, so that the first air channel and the second air channel all blow off hot air, and the temperature of the air blown off by the first air channel is smaller than that of the air blown off by the second air channel.
In one embodiment, the step of acquiring frosting status information of the outdoor heat exchanger includes:
acquiring the coil temperature of the outdoor heat exchanger;
the step of determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition and controlling the air conditioning system to enter a defrosting mode comprises the following steps:
and determining that the temperature of the coil of the outdoor heat exchanger is less than a preset temperature, and controlling the air conditioning system to enter a defrosting mode.
The invention also provides a computer readable storage medium, on which a defrosting program of an air conditioning system is stored, and the defrosting program of the air conditioning system realizes the steps of the defrosting method of the air conditioning system when being executed by a processor.
In the air conditioning system of the present invention, the outdoor heat exchanger, the first throttling element, the first indoor heat exchanger, the second throttling element, and the second indoor heat exchanger are connected in sequence by a connecting pipeline; when the air conditioning system is in a defrosting mode, switching a reversing device to a first switching state, wherein in the first switching state, the outdoor heat exchanger is communicated with an exhaust port of the compressor, and the second indoor heat exchanger is communicated with an air suction port of the compressor; meanwhile, the first indoor fan is in an open state, the second indoor fan is in a stop state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree; therefore, the refrigerant enters the outdoor heat exchanger after being compressed by the compressor, exchanges heat with the outdoor heat exchanger and then flows through the first throttling element, and the refrigerant flowing through the first indoor heat exchanger has higher temperature due to weaker throttling effect or even no throttling effect of the first throttling element; and the refrigerant after the heat exchange of the first heat exchanger flows through the second throttling element for throttling and then enters the second indoor heat exchanger, and because the second indoor fan is in a stop state, at the moment, the refrigerant is only evaporated and absorbed under the second indoor heat exchanger, and does not blow out cold air, so that the cold feeling brought to a user during defrosting is effectively weakened, and the use comfort of the user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning system according to the present invention;
FIG. 2 is a schematic structural diagram of an air conditioning system according to another embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of an indoor unit of an air conditioner of the air conditioning system according to the present invention;
fig. 4 is a flowchart of a defrosting method of an air conditioning system according to the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be noted that if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.
The invention provides an air conditioning system.
Referring to fig. 1 and 2, the present invention provides an air conditioning system, which includes a compressor 20, an outdoor heat exchanger 10, a first indoor heat exchanger 30, a second indoor heat exchanger 40, a first indoor fan 31, a second indoor fan 41, a first throttling element 60, a second throttling element 70, and a connecting pipeline 80, wherein the connecting pipeline 80 is sequentially connected to the outdoor heat exchanger 10, the first throttling element 60, the first indoor heat exchanger 30, the second throttling element 70, and the second indoor heat exchanger 40.
The air conditioning system further includes a direction changing device 50, and the direction changing device 50 has a first switching state in which the direction changing device 50 communicates the outdoor heat exchanger 10 with the discharge port 22 of the compressor 20 and communicates the second indoor heat exchanger 40 with the suction port of the compressor 20, and a second switching state. In the second switching state, the reversing device 50 communicates the outdoor heat exchanger 10 with the suction port of the compressor 20, and communicates the second indoor heat exchanger 40 with the discharge port 22 of the compressor 20.
When the air conditioning system is in the defrosting mode, the reversing device 50 is in the first switching state, the outdoor fan 11 and the first indoor fan 31 are in the on state, the second indoor fan 41 is in the off state, the first throttling element 60 is adjusted to a first preset opening degree, and the second throttling element 70 is adjusted to a second preset opening degree, so that the air blown out through the first indoor heat exchanger 30 is hot air.
Specifically, the air conditioning system includes an air conditioning indoor unit and an air conditioning outdoor unit. Referring to fig. 3, the indoor unit of the air conditioner includes an indoor casing 90, the indoor casing 90 is provided with a first air duct 91 for installing the first indoor heat exchanger 30 and a second air duct 92 for installing the second indoor heat exchanger 40, and the first air duct 91 and the second air duct 92 are arranged in parallel. The first air duct 91 may be located above the second air duct 92, or the first air duct 91 may also be located in front of the second air duct 92. In addition, the first indoor fan 31 is disposed in the first air duct 91, and is configured to blow out an air flow after heat exchange by the first indoor heat exchanger 30; the second indoor fan 41 is disposed in the second air duct 92, and is configured to blow out an air flow after heat exchange by the second indoor heat exchanger 40. The outdoor unit of the air conditioner comprises an outdoor machine shell, and the outdoor machine shell is provided with an air channel for installing the outdoor heat exchanger 10 and the outdoor fan 11.
The reversing device 50 is specifically a four-way valve, and the reversing device 50 has four valve ports: a first port 51, a second port 52, a third port 53, and a fourth port 54. The direction-changing device 50 is capable of being switched between a first switching state in which the first valve port 51 of the direction-changing device 50 is communicated with the second valve port 52, and the third valve port 53 is communicated with the fourth valve port 54, so that the outdoor heat exchanger 10 is communicated with the exhaust port 22 of the compressor 20, and the second indoor heat exchanger 40 is communicated with the suction port of the compressor 20. In the second switching state, the first valve port 51 of the direction switching device 50 is communicated with the third valve port 53, and the second valve port 52 is communicated with the fourth valve port 54, so that the outdoor heat exchanger 10 is communicated with the suction port of the compressor 20, and the second indoor heat exchanger 40 is communicated with the discharge port 22 of the compressor 20.
In the embodiment of the present invention, referring to fig. 1, in a defrosting mode, in order to avoid cold feeling brought to a user when defrosting is performed and improve the use comfort of the user, the first indoor fan 31 may be in an on state, the outdoor fan 11 and the second indoor fan 41 may be in an off state, the first throttling element 60 is adjusted to a first preset opening degree, and the second throttling element 70 is adjusted to a second preset opening degree, so that the air blown out by the first indoor heat exchanger 30 is hot air. Wherein the first throttling element 60 and the second throttling element 70 are electronic expansion valves. The second preset opening degree is smaller than the first preset opening degree. Considering that during defrosting, a refrigerant is compressed by the compressor 20 and then enters the outdoor heat exchanger 10, exchanges heat with the outdoor heat exchanger 10 and then flows through the first throttling element 60, and because the temperature of the refrigerant is reduced after the outdoor heat exchange, in order to ensure that the refrigerant flowing through the first indoor heat exchanger 30 has a certain residual heat, the throttling effect of the first throttling element 60 is weak or even no throttling effect, that is, the first preset opening degree can be selected as the maximum opening degree of the first throttling element 60; alternatively, the first preset opening degree may be selected to be 95% of the maximum opening degree of the first throttling element 60, and is not particularly limited. Since the refrigerant flowing through the first indoor heat exchanger 30 has a high temperature, the first indoor fan 31 is in an on state, and thus the first indoor fan 31 can blow out hot air having a high temperature. The refrigerant after heat exchange by the first heat exchanger flows through the second throttling element 70 for throttling and then enters the second indoor heat exchanger 40, and because the second indoor fan 41 is in a stop state, the refrigerant only evaporates and absorbs heat under the second indoor heat exchanger 40 at the moment, and does not blow out cold air, so that the cold feeling brought to a user during defrosting is weakened.
In the air conditioning system of the present invention, a connecting line 80 is used to connect the outdoor heat exchanger 10, the first throttling element 60, the first indoor heat exchanger 30, the second throttling element 70, and the second indoor heat exchanger 40 in sequence; when the air conditioning system is in a defrosting mode, switching a reversing device 50 to a first switching state, wherein in the first switching state, the outdoor heat exchanger 10 is communicated with the exhaust port 22 of the compressor 20, and the second indoor heat exchanger 40 is communicated with the suction port of the compressor 20; meanwhile, the first indoor fan 31 is in an on state, the second indoor fan 41 is in an off state, the first throttling element 60 is adjusted to a first preset opening degree, and the second throttling element 70 is adjusted to a second preset opening degree; thus, the refrigerant is compressed by the compressor 20 and then enters the outdoor heat exchanger 10, exchanges heat with the outdoor heat exchanger 10 and then flows through the first throttling element 60, and the refrigerant flowing through the first indoor heat exchanger 30 has a higher temperature due to a weaker throttling effect or even no throttling effect of the first throttling element 60, and at the moment, the first indoor fan 31 is in an open state, so that the first indoor fan 31 can blow out hot air with a higher temperature; and the refrigerant after the heat exchange of the first heat exchanger flows through the second throttling element 70 for throttling and then enters the second indoor heat exchanger 40, and because the second indoor fan 41 is in a stop state, at the moment, the refrigerant only evaporates and absorbs heat under the second indoor heat exchanger 40, and does not blow out cold air, so that the cold feeling brought to a user during defrosting is effectively weakened, and the use comfort of the user is improved.
In one embodiment, the wind from the first wind channel 91 may be located at an upper layer of the wind from the second wind channel 92. Specifically, referring to fig. 3, the indoor housing 90 is provided with an air inlet, a first air outlet 93 communicated with the first air duct 91, and a second air outlet 94 communicated with the second air duct 92. The air blown out from the first outlet 92 is located at the upper layer of the air blown out from the second outlet 94. It is understood that, in order to realize that the wind blown out from the first wind outlet 92 is located at the upper layer of the wind blown out from the second wind outlet 94, a first wind guiding component 95 may be disposed at the first wind outlet 93, and a second wind guiding component 96 may be disposed at the second wind outlet 94. The first air guiding assembly 95 is configured to enable the first air outlet 93 to blow air upward, and the second air guiding assembly 96 is configured to enable the second air outlet 94 to blow air downward, so that the air blown from the first air outlet 92 is located at an upper layer of the air blown from the second air outlet 94.
Referring to fig. 2, when the air conditioning system is in the heating mode, the reversing device 50 is in the second switching state, the first indoor fan 31 and the second indoor fan 41 are in the open state, the first throttling element 60 is adjusted to a third preset opening degree, and the second throttling element 70 is adjusted to a fourth preset opening degree, so that the first air duct and the second air duct both blow out hot air, and the temperature of the air blown out by the first air duct 91 is lower than the temperature of the air blown out by the second air duct 92. So, can make indoor upper strata temperature be less than the lower floor's temperature when heating winter, satisfy the human comfort principle to user's use travelling comfort has further been promoted.
In order to make the indoor upper layer temperature lower than the lower layer temperature during heating in winter, the third preset opening degree may be smaller than the fourth preset opening degree. Alternatively, the third preset opening degree of the first throttling element 60 and the fourth opening degree of the second throttling element 70 may be determined according to the indoor ambient temperature, the outdoor ambient temperature and the operating frequency of the compressor 20. For example, for convenience of description, if the third preset opening degree is defined as P1, the indoor ambient temperature is defined as T1, the outdoor ambient temperature is defined as T2, and the operating frequency of the compressor 20 is defined as f, then P1 is T1+ T2+2.5f +30, where P2 is 2T1+1.5T2+2f + 60. Thus, the opening degrees of the first throttling element 60 and the second throttling element 70 are determined according to the indoor environment temperature, the outdoor environment temperature and the operating frequency of the compressor 20, so that the temperature of the air blown out from the first air duct 91 and the temperature of the air blown out from the second air duct 92 are controlled, the indoor upper layer temperature is guaranteed to be slightly lower than the indoor lower layer temperature, the temperature difference between the upper layer temperature and the lower layer temperature is not too large, and the use comfort of a user is guaranteed to be better. Specifically, the third opening degree of the first throttling element 60 is greater than or equal to 200 and less than or equal to 330. The fourth degree of opening of second throttling element 70 is greater than or equal to 150 and less than or equal to 270.
In addition, in an embodiment, the rotation speed of the first indoor fan 31 in the heating mode is greater than the rotation speed of the first indoor fan 31 in the defrosting mode. This is because, in the defrosting mode, the air blown out through the first indoor fan 31 is hot air, and therefore, in order to improve the user comfort, the rotation speed of the first indoor fan 31 may be appropriately reduced so that the first indoor fan 31 operates at a lower rotation speed. In the heating mode, the air blown by the first indoor fan 31 and the air blown by the second indoor fan 41 are both hot air, and in order to make the user feel hot air, the first indoor fan 31 and the second indoor fan 41 may both operate at a higher rotation speed.
Referring to fig. 1 and 2, in some embodiments, a refrigerant return branch 23 is further disposed between the inlet 21 of the compressor 20 and the first throttling element 60. Specifically, the refrigerant return branch 23 includes a gas-liquid separator 25 and a control valve 24, and the gas-liquid separator 25 may be configured to separate liquid carried in refrigerant gas and recycle the liquid to the compressor 20. The control valve 24 may be an electromagnetic two-way valve.
Referring to fig. 4, the present invention further provides a defrosting method of an air conditioning system, including the following steps:
step S10, acquiring frosting state information of the outdoor heat exchanger;
step S20, determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition, and controlling the air conditioning system to enter a defrosting mode;
when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air.
The frosting state information is the surface temperature information of the outdoor heat exchanger or the frosting thickness information of the surface of the outdoor heat exchanger, and whether the outdoor unit needs to start to defrost or not can be judged by other information. Such as outdoor air temperature and humidity information, or outdoor heat exchanger operation time information, etc., but the present invention is not limited thereto. Specifically, when the outdoor heat exchanger is judged whether to reach the preset defrosting condition or not according to the surface temperature information of the outdoor heat exchanger, whether the surface temperature of the outdoor heat exchanger reaches the preset defrosting temperature or not (at the moment, the preset defrosting temperature is the preset defrosting condition) can be judged, and the surface temperature information of the outdoor heat exchanger can be measured through the temperature sensor. When the information of the frosting thickness of the surface of the outdoor heat exchanger is used for judging whether the outdoor heat exchanger reaches the preset frosting condition, judging whether the frosting thickness of the surface of the outdoor heat exchanger reaches the preset frosting thickness (at the moment, the preset frosting thickness is the preset frosting condition). Compared with the surface temperature information of the outdoor heat exchanger, the surface frosting thickness information of the outdoor heat exchanger has high judgment accuracy, and the surface frosting condition of the outdoor heat exchanger can be reflected more truly.
Specifically, step 10 includes:
and 11, acquiring the temperature of the coil of the outdoor heat exchanger.
and 21, determining that the temperature of the coil of the outdoor heat exchanger is less than a preset temperature, and controlling the air conditioning system to enter a defrosting mode.
Considering that when defrosting, a refrigerant is compressed by a compressor and then enters an outdoor heat exchanger, and flows through a first throttling element after exchanging heat with the outdoor heat exchanger, and because the temperature of the refrigerant is reduced after outdoor heat exchange, in order to ensure that the refrigerant flowing through the first indoor heat exchanger has certain waste heat, the throttling effect of the first throttling element is weaker or even no throttling effect, namely the first preset opening degree can be selected as the maximum opening degree of the first throttling element; alternatively, the first preset opening degree may be selected to be 95% of the maximum opening degree of the first throttling element, and is not particularly limited. Because the refrigerant flowing through the first indoor heat exchanger has higher temperature, at the moment, the first indoor fan is in an open state, and therefore the first indoor fan can blow out hot air with higher temperature. The refrigerant after heat exchange of the first heat exchanger flows through the second throttling element for throttling and then enters the second indoor heat exchanger, and the second indoor fan is in a stop state, so that the refrigerant is evaporated and absorbs heat only under the second indoor heat exchanger, and cold air is not blown out, and the cold feeling brought to a user during defrosting is weakened.
In one embodiment, the step 20 includes:
and step S22, determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition, controlling the frequency of the compressor to be reduced to a first preset frequency, and operating for a first preset time.
And step S23, controlling the air conditioning system to enter a defrosting mode.
The first preset frequency of the compressor may be a certain value, for example, 35Hz or 45Hz, and may be set according to actual use requirements. Of course, the first preset frequency of the compressor may also be a certain range, and is not particularly limited. The first preset time period may also be a certain number, such as 30s, 40s, 50s, etc. Before controlling the air conditioning system to switch from the heating mode to the defrosting mode, controlling the frequency of the compressor to be reduced to a first preset frequency, and operating for a first preset time, effectively balancing the system pressure inside the reversing device, so that the reversing device is easily switched from the second switching state to the first switching state, and the compressor is prevented from being stopped before the reversing device is switched, thereby ensuring that the first indoor fan can continuously blow hot air, and improving the use comfort of users.
In this embodiment, after the step of controlling the frequency of the compressor to decrease to the first preset frequency, the method further includes:
and step S24, controlling the rotating speed of the first indoor fan to be reduced to a first preset rotating speed, and controlling the rotating speed of the second indoor fan to be reduced to a second preset rotating speed.
Considering that the air conditioning system is switched from the heating mode to the defrosting mode, the indoor outlet air temperature is reduced after the frequency of the compressor is reduced to the first preset frequency, and in order to make a user not easily feel the reduction of the outlet air temperature, the rotating speeds of the first indoor fan and the second indoor fan can be properly reduced. For example, the rotation speed of the first indoor fan is reduced to a first preset rotation speed, and the rotation speed of the second indoor fan is reduced to a second preset rotation speed. Wherein the first rotation speed and the second rotation speed may be the same or different. Optionally, the first rotation speed is 900rpm, and the second rotation speed is 900 rpm. Here, it should be noted that after the air conditioning system is switched to the defrosting mode, the rotation speed of the first indoor fan needs to be further reduced, that is, the rotation speed of the first indoor fan in the defrosting mode is less than a first preset rotation speed.
Further, after the step 20, the method further includes:
and step 30, controlling the frequency of the compressor to be increased to a second preset frequency.
The second preset frequency is greater than the first preset frequency. Alternatively, the second preset frequency of the compressor may be a certain value, for example, 90Hz or 95Hz, and may be set according to actual use requirements. Of course, the second preset frequency of the compressor may also be a certain range, and is not particularly limited. Before entering the defrosting mode, the frequency of the compressor is reduced to a first preset frequency in order to balance the gas pressure in the reversing device, so that after entering the defrosting mode, the frequency of the compressor is increased to a second preset frequency (defrosting frequency) to ensure that the indoor temperature does not drop too much in the defrosting mode, the cold feeling brought to a user during defrosting can be effectively weakened, and the use comfort of the user is improved.
In an embodiment, after the step 20, the method further includes:
when the air conditioning system is in a heating mode, the reversing device is in the second switching state, the first indoor fan and the second indoor fan are in an opening state, the first throttling element is adjusted to a third preset opening degree, the second throttling element is adjusted to a fourth preset opening degree, so that the first air channel and the second air channel all blow off hot air, and the temperature of the air blown off by the first air channel is smaller than that of the air blown off by the second air channel.
In the defrosting process, the frost layer is directly heated through a high-temperature refrigerant to melt the frost layer, the temperature of the coil pipe of the outdoor heat exchanger can be continuously increased, and the thickness of the frost layer can not be continuously thinned. When the temperature of the coil pipe of the outdoor heat exchanger meets the condition of quitting defrosting, or the thickness of a frost layer meets the condition of quitting defrosting, the defrosting can be determined to be finished, and the air-conditioning system can be controlled to enter a heating mode. Specifically, control the switching-over device switches into the second switching state, control the frequency of compressor risees to the third frequency of predetermineeing (heating frequency), control the rotational speed of first indoor fan risees to the third rotational speed of predetermineeing (heating rotational speed), control the rotational speed of the indoor fan of second risees to the fourth rotational speed of predetermineeing (heating rotational speed), control first throttling element adjusts to the third and predetermines the aperture, controls second throttling element adjusts to the fourth and predetermines the aperture to make the wind that first indoor fan blew off with the wind that the indoor fan of second blew off is hot-blast, just the temperature of the wind that first wind channel blew off is less than the temperature of the wind that the second wind channel blew off. Therefore, the air conditioning system directly enters a heating mode without stopping, hot air can be continuously provided indoors, and a user is prevented from feeling cold and hot temperature difference. Meanwhile, the temperature of the upper layer in the room can be lower than that of the lower layer, the principle of human comfort is met, and the use comfort of a user is further improved.
Of course, in other embodiments, after the step 20, the method further includes:
and step 50, determining that the frosting state information of the outdoor heat exchanger meets the condition of quitting defrosting, and controlling the air conditioning system to stop running.
Alternatively, the frequency of the compressor may also need to be reduced in order to equalize the gas pressure inside the reversing device before the air conditioning system switches from the defrost mode to the heating mode. That is, the step 40 includes:
and step 42, controlling the air conditioning system to enter a heating mode.
The third preset frequency of the compressor may be a certain value, for example, 35Hz or 45Hz, and may be set according to actual use requirements. Of course, the third preset frequency of the compressor may also be a certain range, and is not particularly limited. The second preset time period may also be a certain number, such as 30s, 40s, 50s, etc. Before the air conditioning system is controlled to be switched to the heating mode from the defrosting mode, the frequency of the compressor is controlled to be reduced to the third preset frequency, and the second preset time is operated, so that the gas pressure in the reversing device can be effectively balanced, the reversing device is easily switched to the second switching state from the first switching state, the compressor is prevented from being stopped before the reversing device is switched, the first indoor fan can continuously blow hot air, and the use comfort of a user is improved.
In the embodiment of the present invention, the air conditioning system further includes an indoor enclosure, the indoor enclosure is provided with a first air duct for installing the first indoor heat exchanger, and a second air duct for installing the second indoor heat exchanger, and the first air duct is located above the second air duct. In order to make the indoor upper layer temperature lower than the lower layer temperature during heating in winter, the third preset opening degree may be smaller than the fourth preset opening degree. Alternatively, the third preset opening degree of the first throttling element and the fourth opening degree of the second throttling element may be determined according to an indoor ambient temperature, an outdoor ambient temperature and an operating frequency of the compressor. For example, for convenience of description, if the third preset opening degree is defined as P1, the indoor ambient temperature is defined as T1, the outdoor ambient temperature is defined as T2, and the operating frequency of the compressor is defined as f, then P1 is T1+ T2+2.5f +30, where P2 is 2T1+1.5T2+2f + 60. Therefore, the opening degrees of the first throttling element and the second throttling element are determined according to the indoor environment temperature, the outdoor environment temperature and the running frequency of the compressor, the temperature of the air blown out from the first air channel and the temperature of the air blown out from the second air channel are further controlled, the indoor upper layer temperature is guaranteed to be slightly lower than the indoor lower layer temperature, the temperature difference between the indoor upper layer temperature and the indoor lower layer temperature is not too large, and the use comfort of a user is guaranteed to be good. Specifically, the third opening degree of the first throttling element is greater than or equal to 200 and less than or equal to 330. The fourth degree of the second throttling element is greater than or equal to 150 and less than or equal to 270.
In addition, before the step of controlling the air conditioning system to enter the defrosting mode, the method further includes:
and 25, controlling the refrigerant return branch to be disconnected.
And a refrigerant return branch is also arranged between the air inlet of the compressor and the first throttling element. Specifically, the refrigerant return branch comprises a gas-liquid separator and a control valve, and the gas-liquid separator can be used for separating liquid carried in refrigerant gas and recycling the liquid into the compressor.
The invention also provides a computer readable storage medium, on which a defrosting program of an air conditioning system is stored, and the defrosting program of the air conditioning system realizes the steps of the defrosting method of the air conditioning system when being executed by a processor.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a television, a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. An air conditioning system is characterized by comprising a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first indoor fan, a second indoor fan, a first throttling element, a second throttling element and a connecting pipeline, wherein the connecting pipeline is sequentially connected with the outdoor heat exchanger, the first throttling element, the first indoor heat exchanger, the second throttling element and the second indoor heat exchanger;
the air conditioning system further comprises a reversing device, wherein the reversing device has a first switching state and a second switching state, and in the first switching state, the reversing device enables the outdoor heat exchanger to be communicated with the air outlet of the compressor and enables the second indoor heat exchanger to be communicated with the air suction port of the compressor; in the second switching state, the reversing device enables the outdoor heat exchanger to be communicated with the air suction port of the compressor, and enables the second indoor heat exchanger to be communicated with the air exhaust port of the compressor;
when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air.
2. The air conditioning system of claim 1, wherein the second predetermined opening degree is less than the first predetermined opening degree.
3. The air conditioning system as claimed in claim 2, wherein the first preset opening degree is a maximum opening degree of the first throttling element.
4. An air conditioning system according to any one of claims 1 to 3, further comprising an indoor cabinet provided with a first air duct in which the first indoor heat exchanger is installed and a second air duct in which the second indoor heat exchanger is installed, wherein the air blown from the first air duct is located at an upper level of the air blown from the second air duct;
when the air conditioning system is in a heating mode, the reversing device is in the second switching state, the first indoor fan and the second indoor fan are in an opening state, the first throttling element is adjusted to a third preset opening degree, the second throttling element is adjusted to a fourth preset opening degree, so that the first air channel and the second air channel all blow off hot air, and the temperature of the air blown off by the first air channel is smaller than that of the air blown off by the second air channel.
5. The air conditioning system of claim 4, wherein the third predetermined opening degree is less than the fourth predetermined opening degree.
6. The air conditioning system as claimed in claim 4, wherein a rotation speed of the first indoor fan in the heating mode is greater than a rotation speed of the first indoor fan in the defrosting mode.
7. A defrosting method of an air conditioning system is characterized by comprising the following steps:
acquiring frosting state information of the outdoor heat exchanger;
determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition, and controlling the air conditioning system to enter a defrosting mode;
when the air conditioning system is in a defrosting mode, the reversing device is in a first switching state, the first indoor fan is in an opening state, the second indoor fan is in a stopping state, the first throttling element is adjusted to a first preset opening degree, and the second throttling element is adjusted to a second preset opening degree, so that air blown out through the first indoor heat exchanger is hot air.
8. The defrosting method of an air conditioning system according to claim 7, wherein the step of controlling the air conditioning system to enter the defrosting mode is preceded by the step of:
and controlling the frequency of the compressor to be reduced to a first preset frequency, and operating for a first preset time.
9. The defrosting method of an air conditioning system according to claim 8, wherein the step of controlling the frequency of the compressor to be decreased to a first preset frequency is followed by further comprising:
and controlling the rotating speed of the first indoor fan to be reduced to a first preset rotating speed, and controlling the rotating speed of the second indoor fan to be reduced to a second preset rotating speed.
10. The defrosting method of an air conditioning system of claim 8, after the step of controlling the air conditioning system to enter the defrosting mode, further comprising:
controlling the frequency of the compressor to rise to a second preset frequency.
11. The defrosting method of an air conditioning system according to any one of claims 7 to 10, wherein after the step of determining that the frosting state information of the outdoor heat exchanger satisfies the preset defrosting condition and controlling the air conditioning system to enter the defrosting mode, the method further comprises:
determining that the frosting state information of the outdoor heat exchanger meets the condition of exiting defrosting, and controlling the air-conditioning system to enter a heating mode;
when the air conditioning system is in a heating mode, the reversing device is in the second switching state, the first indoor fan and the second indoor fan are in an opening state, the first throttling element is adjusted to a third preset opening degree, the second throttling element is adjusted to a fourth preset opening degree, so that the first air channel and the second air channel can blow out hot air, and the temperature of the air blown out from the first air channel is smaller than that of the air blown out from the second air channel.
12. The defrosting method of an air conditioning system according to any one of claims 7 to 10, wherein the step of acquiring frosting condition information of the outdoor heat exchanger includes:
acquiring the coil temperature of the outdoor heat exchanger;
the step of determining that the frosting state information of the outdoor heat exchanger meets a preset defrosting condition and controlling the air conditioning system to enter a defrosting mode comprises the following steps:
and determining that the temperature of the coil of the outdoor heat exchanger is less than a preset temperature, and controlling the air conditioning system to enter a defrosting mode.
13. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a defrosting program of an air conditioning system, which when executed by a processor implements the steps of the defrosting method of the air conditioning system according to any one of claims 7 to 12.
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| CN115218275A (en) * | 2022-07-18 | 2022-10-21 | 珠海格力电器股份有限公司 | Cabinet air conditioner air duct assembly, cabinet air conditioner and control method of cabinet air conditioner air duct assembly |
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| CN110926072A (en) * | 2019-11-21 | 2020-03-27 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and defrosting control method, control device and storage medium thereof |
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| JP2007085730A (en) * | 2006-12-18 | 2007-04-05 | Mitsubishi Electric Corp | Air conditioner and method of operating air conditioner |
| CN110186153A (en) * | 2019-07-11 | 2019-08-30 | 芜湖美智空调设备有限公司 | Air conditioner and its progress control method, operating control device and computer readable storage medium |
| CN110926072A (en) * | 2019-11-21 | 2020-03-27 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and defrosting control method, control device and storage medium thereof |
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| CN115218275A (en) * | 2022-07-18 | 2022-10-21 | 珠海格力电器股份有限公司 | Cabinet air conditioner air duct assembly, cabinet air conditioner and control method of cabinet air conditioner air duct assembly |
| CN115218275B (en) * | 2022-07-18 | 2024-03-22 | 珠海格力电器股份有限公司 | Cabinet air conditioner air duct assembly, cabinet air conditioner and control method of cabinet air conditioner |
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