CN113959107A - Refrigerating system and control method - Google Patents
Refrigerating system and control method Download PDFInfo
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- CN113959107A CN113959107A CN202111177682.XA CN202111177682A CN113959107A CN 113959107 A CN113959107 A CN 113959107A CN 202111177682 A CN202111177682 A CN 202111177682A CN 113959107 A CN113959107 A CN 113959107A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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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
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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
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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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
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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
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the field of air conditioners, and particularly relates to a refrigeration system and a control method, wherein the refrigeration system comprises an outdoor heat exchanger, a compressor, an indoor heat exchanger and a plurality of throttling units; the indoor heat exchanger comprises a plurality of indoor heat exchange portions, wherein the first end of each indoor heat exchange portion is connected with the compressor, the second end of each indoor heat exchange portion is connected with the corresponding throttling units in a one-to-one correspondence mode, each indoor heat exchange portion is connected with the corresponding throttling units in series to form a plurality of indoor branches and connected to the air suction end of the compressor and the end, far away from the compressor, of the outdoor heat exchanger, and each throttling unit comprises a throttling valve and an electromagnetic valve which are arranged in parallel. The refrigeration system and the control method of the embodiment can select different air supply modes and dehumidification modes according to different indoor working conditions, solve the problems of low indoor environment temperature and poor comfort in the conventional dehumidification process of the air conditioner, and also solve the problem of simplification realized by the dehumidification mode without cooling.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to a refrigeration system and a control method.
Background
The dehumidification mode and the refrigeration mode of the conventional air conditioner are not substantially different, and both of them are air-conditioning refrigeration processes (1 → 2) as shown in fig. 1, that is, the temperature of the air passing through the air-conditioning evaporator is reduced, and the water vapor in the air is liquefied into condensed water and discharged to the outside of the room, thereby reducing the humidity of the indoor air. However, in the dehumidification mode, the indoor air temperature is reduced while the indoor air humidity is reduced, and too low air temperature or air supply temperature is easy to cause cold and uncomfortable feeling to people, so that the comfort experience of the human body to the air conditioner is influenced.
In order to realize non-cooling dehumidification, independent dehumidification or constant-temperature dehumidification is adopted at present, as shown in fig. 1, the difference between the method and the traditional refrigeration dehumidification mode is that a (2 → 3) heating process is added, namely, the process of reheating air cooled by an evaporator is added, so that the temperature of the air cooled by dehumidification is increased again, and the temperature of indoor air is ensured to be relatively stable. However, the method only considers the air temperature to be increased again, does not consider different indoor heat and humidity load working conditions and the air supply mode of the air conditioner, and is relatively single in realization mode.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a refrigeration system and a control method which can select different air supply modes and dehumidification modes according to different indoor working conditions.
In order to solve the above technical problems, a first object of the present invention is to provide a refrigeration system, in which the indoor heat exchanger includes a plurality of indoor heat exchanging portions, a first end of each indoor heat exchanging portion is connected to the compressor, a second end of each indoor heat exchanging portion is connected to the plurality of throttling units in a one-to-one correspondence manner, and each indoor heat exchanging portion and the corresponding throttling unit are connected in series to form a plurality of indoor branches connected in parallel to an air suction end of the compressor and an end of the outdoor heat exchanger away from the compressor, and each throttling unit includes a throttling valve and an electromagnetic valve which are arranged in parallel.
The refrigerating system further comprises a control module, the refrigerating system comprises a plurality of dehumidification modes and a plurality of air supply modes, the air conditioner determines the current indoor heat and humidity load working condition according to the obtained indoor temperature value and the indoor humidity value in the refrigerating operation process, and selects the corresponding air supply mode and the dehumidification mode according to the determined heat and humidity load working condition.
Further optionally, the refrigeration system is a heat pump refrigeration system.
Further optionally, the refrigeration system includes multiple dehumidification modes and multiple air supply modes, and the control method includes:
and in the process of refrigerating operation, the air conditioner determines the current indoor heat and humidity load working condition according to the acquired indoor temperature value and indoor humidity value, and selects a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
Further optionally, the multiple air supply modes include an upper and lower air supply mode and an upper air outlet mode, wherein the upper and lower air outlets of the air conditioner are controlled to simultaneously discharge air in the upper and lower air outlet modes, and the upper air outlet mode only controls the air discharge of the upper air outlet of the air conditioner;
the multiple dehumidification mode is including cooling dehumidification mode and non-cooling dehumidification mode, control all indoor heat transfer portion refrigeration and dehumidify in the cooling dehumidification mode, the refrigeration of the indoor heat transfer portion of control section in the non-cooling dehumidification mode, other indoor heat transfer portions heats and dehumidifies.
Further optionally, control all indoor heat transfer portion refrigeration and dehumidify among the cooling dehumidification mode, control partial indoor heat transfer portion refrigeration among the non-cooling dehumidification mode, other indoor heat transfer portions heat and dehumidify, include
In the cooling and dehumidifying mode, throttle valves of all indoor heat exchange parts are controlled to be opened, and electromagnetic valves are controlled to be closed;
in the non-cooling dehumidification mode, a throttle valve of part of indoor heat exchange parts is controlled to be opened, and an electromagnetic valve is controlled to be closed; and controlling the throttle valves of other indoor heat exchange parts to be closed and the electromagnetic valve to be opened.
Further optionally, the determining a current indoor heat and humidity load condition according to the obtained indoor temperature value and indoor humidity value, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load condition includes
Obtaining an indoor current temperature value tin and a current humidity value din, and respectively calculating a temperature difference delta tin and a humidity difference delta din, wherein the temperature difference delta tin is | the current temperature value tin-a set temperature value tc |, and the humidity difference delta din is | the current humidity value din-a set humidity value dc |;
comparing the temperature difference delta tin with the set temperature difference t1 and the humidity difference delta din with the set humidity difference d 1;
and determining the current indoor heat and humidity load working condition according to the comparison result, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
Further optionally, the determining of the current indoor thermal-humidity load condition according to the comparison result and the selecting of the corresponding air supply mode and dehumidification mode according to the determined thermal-humidity load condition include
When the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load and humidity load are large, selecting the air supply mode of the air conditioner as an up-down air supply mode and selecting the dehumidification mode as a non-cooling dehumidification mode;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is smaller than or equal to the set temperature difference t1, determining that the current indoor heat load is small and the current indoor humidity load is large, selecting the air supply mode of the air conditioner as an upper air supply mode and selecting the dehumidification mode as a non-cooling dehumidification mode;
when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load is large and the current indoor humidity load is small, selecting the air supply mode of the air conditioner as an up-down air supply mode and selecting the dehumidification mode as a cooling dehumidification mode;
and when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be less than or equal to the set temperature difference t1, determining that the current indoor heat load and humidity load are small, selecting the air supply mode of the air conditioner as an upper air supply mode and selecting the dehumidification mode as a cooling dehumidification mode.
Further optionally, the indoor heat exchanger comprises an upper heat exchange group, a middle heat exchange group and a lower heat exchange group which are sequentially arranged from top to bottom, and each heat exchange group comprises at least one indoor heat exchange part;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, the upper heat exchange group and the middle heat exchange group are controlled to refrigerate, and the lower heat exchange group is controlled to heat;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is smaller than or equal to the set temperature difference t1, controlling the upper heat exchange group to heat and controlling the middle heat exchange group and the lower heating group to refrigerate;
when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, the upper heat exchange group, the middle heat exchange group and the lower heating group are controlled to refrigerate;
and when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be less than or equal to the set temperature difference t1, the upper heat exchange group, the middle heat exchange group and the lower heating group are controlled to refrigerate.
A third object of the invention proposes a control device comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions which, when executed by the one or more processors, are adapted to implement the method of any of the above.
A fourth object of the invention proposes a non-transitory computer-readable storage medium on which program instructions are stored, which program instructions, when executed by one or more processors, are adapted to implement the method according to any of the above.
A fifth object of the present invention is to provide an air conditioner using the above-mentioned refrigeration system, or using the method of any of the above-mentioned items, or including the above-mentioned control device, or having the above-mentioned non-transitory computer-readable storage medium.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the refrigeration system of the invention divides the indoor heat exchanger into different indoor heat exchange parts, each indoor heat exchange part is respectively controlled by the electromagnetic valve and the throttle valve, in the process of air-conditioning refrigeration operation, the indoor temperature and humidity and the set temperature and humidity of the air conditioner are detected and recorded in real time, the heat and humidity load of the current indoor working condition is determined by the difference value of the indoor temperature and humidity and the set temperature and humidity of the air conditioner, different air supply modes and dehumidification modes are selected according to different working conditions, the functions of different indoor heat exchange parts are adjusted by controlling the opening and closing of the electromagnetic valve and the throttle valve, namely, the indoor heat exchange parts are used as a condenser to heat air or an evaporator to cool and dehumidify air; the problem that the indoor environment temperature is reduced and the comfort is not good in the conventional dehumidification process of the air conditioner is solved, and the problem of simplification realized by a non-cooling dehumidification mode is also solved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: a non-cooling dehumidification enthalpy diagram of the air conditioner is obtained;
FIG. 2: a diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 3: is a control flow diagram of an embodiment of the invention;
FIG. 4: is a control flow diagram of a specific implementation of an embodiment of the present invention.
Wherein: 1-an upper heat exchange group; 2-a middle heat exchange group; 3-lower heat exchange group; 4-a compressor; 5-outdoor heat exchanger; 11-a first throttle valve; 12-a first solenoid valve; 21-a second throttle valve; 22-a second solenoid valve; 31-a third throttle valve; 32-third solenoid valve.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The existing non-cooling dehumidification mode only considers the re-lifting of the air temperature, does not consider different indoor heat and humidity load working conditions and the air supply mode of an air conditioner, and is relatively single in implementation mode, so that the embodiment provides a refrigeration system which comprises an outdoor heat exchanger 5, a compressor 4, an indoor heat exchanger and a plurality of throttling units; the indoor heat exchanger comprises a plurality of indoor heat exchange portions, the first end of each indoor heat exchange portion is connected with the compressor, the second end of each indoor heat exchange portion is connected with a plurality of throttling units in a one-to-one correspondence mode, each indoor heat exchange portion and the corresponding throttling units are connected in series to form a plurality of indoor branches and connected to one end, far away from the compressor, of the compressor suction end and the outdoor heat exchanger, and each throttling unit comprises a throttling valve and an electromagnetic valve which are arranged in parallel. The refrigerating system further comprises a control module, the refrigerating system comprises a plurality of dehumidification modes and a plurality of air supply modes, in the refrigerating operation process of the air conditioner, the control module determines the current indoor heat and humidity load working condition according to the obtained indoor temperature value and the indoor humidity value, and selects the corresponding air supply mode and the dehumidification mode according to the determined heat and humidity load working condition.
The refrigerating system of this embodiment divides the indoor heat exchanger into a plurality of indoor heat transfer portions on original refrigerating system's basis, and a plurality of indoor heat transfer portions are parallelly connected to every indoor heat transfer portion corresponds solitary choke valve and solenoid valve, thereby confirms that the indoor heat transfer portion that corresponds with it is cooling or heating through the switching of control choke valve and solenoid valve. As shown in fig. 2, according to different indoor thermal and humidity load conditions, the function conversion of the indoor heat exchanger is further controlled by controlling the opening and closing of the electromagnetic valve and the throttle valve, and the specific implementation manner is as follows: when the electromagnetic valve is closed and the throttle valve is opened, the indoor heat exchanger can be used as an evaporator to realize the functions of cooling and dehumidifying the supplied air flow, and as shown in fig. 1, the process of processing the supplied air flow from a state point 1 to a state point 2 is realized; when the electromagnetic valve is opened and the throttle valve is closed, the indoor heat exchanger can be used as a condenser to realize the function of reheating the cooling and dehumidifying supply air flow, and as shown in fig. 1, the process of processing the supply air flow from a state point 2 to a state point 3 is shown. After the indoor damp and hot working condition is determined, the indoor heat exchanger can be adjusted to the working mode according with the current damp and hot working condition by controlling the opening and closing of the electromagnetic valves and the throttle valves of different indoor heat exchanging parts.
Further optionally, the refrigeration system of this embodiment is a heat pump refrigeration system, and specifically, the refrigeration system includes a four-way reversing valve, where the four-way reversing valve is connected between the first ends of the indoor heat exchanging portions, the end of the outdoor heat exchanger close to the compressor, and the air suction port and the air discharge port of the compressor. In the embodiment, the four-way reversing valve is additionally arranged, so that the refrigerating system can also refrigerate and heat. The control of the dehumidification method of the present embodiment is performed only at the time of the cooling operation.
Further optionally, the refrigeration system includes multiple dehumidification modes and multiple air supply modes, as shown in the control flow chart shown in fig. 3, and the control method includes:
s1, in the process of refrigerating operation of the air conditioner,
s2, acquiring an indoor temperature value and an indoor humidity value;
s3, determining the current indoor heat and humidity load working condition according to the obtained indoor temperature value and indoor humidity value, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
The embodiment determines the heat and humidity load of the indoor working condition according to the temperature and humidity conditions of the air conditioner, selects different refrigeration air supply modes and dehumidification modes according to the heat and humidity loads of different indoor working conditions, realizes refrigeration and dehumidification integrated control, meets the requirements of the heat and humidity loads of different indoor working conditions, and effectively improves the problem of energy consumption waste in the operation process of the air conditioner.
Further optionally, the multiple air supply modes include an upper and lower air supply mode and an upper air outlet mode, wherein the upper and lower air outlets of the air conditioner are controlled to simultaneously discharge air in the upper and lower air outlet modes, and only the upper air outlet of the air conditioner is controlled to discharge air in the upper air outlet mode; multiple dehumidification mode is including cooling dehumidification mode and non-cooling dehumidification mode, and the refrigeration of all indoor heat transfer portions of control is dehumidified in the cooling dehumidification mode, and the refrigeration of control section indoor heat transfer portion in the non-cooling dehumidification mode, other indoor heat transfer portions heat and dehumidify to can maintain indoor temperature stable at the in-process of dehumidification.
In the cooling and dehumidifying mode, the throttle valves of all indoor heat exchanging parts are controlled to be opened, and the electromagnetic valves are closed, so that the indoor heat exchanging parts can serve as evaporators to realize the functions of cooling and dehumidifying the air flow. In the non-cooling dehumidification mode, a throttle valve of part of indoor heat exchange parts is controlled to be opened, and an electromagnetic valve is closed; the throttle valves of other indoor heat exchange parts are controlled to be closed, the electromagnetic valve is opened, and the residual indoor heat exchange parts can be used as condensers to realize the function of reheating the cooled and dehumidified air supply airflow.
Further alternatively, as shown in the flowchart of fig. 4, step S1 includes:
s11, obtaining a current indoor temperature value tin and a current indoor humidity value din, and calculating a temperature difference Δ tin and a humidity difference Δ din, where the temperature difference Δ tin is | the current temperature value tin-a set temperature value tc |, and the humidity difference Δ din is | the current humidity value din-a set humidity value dc |;
s12, comparing the temperature difference delta tin with the set temperature difference t1, and comparing the humidity difference delta din with the set humidity difference d 1;
and S13, determining the current indoor heat and humidity load working condition according to the comparison result, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
When the air conditioner is started for refrigeration, the temperature sensor is used for detecting and recording the current indoor temperature tin of a room in real time, the set temperature tc of the air conditioner, and the delta tin is specified as the difference value between the current indoor temperature tin and the set temperature tc of the air conditioner. tc is the comfortable set temperature of the indoor environment during air conditioning refrigeration, and is generally 22-28 ℃; the dc is the comfortable set humidity of the indoor environment during air conditioning refrigeration, and is generally 40-60%. Δ tin is the absolute value of the difference between the current indoor temperature tin and the set temperature tc of the air conditioner, and Δ din is the absolute value of the difference between the current indoor humidity din and the set temperature dc of the air conditioner. t1 is used for comparing with the size of delta tin, and is generally 0-2 ℃; d1 is used for comparison with Δ din size, typically 5-10%.
In step S11, after the air conditioner operates for a set time, the current indoor temperature value tin and the current humidity value din are obtained, and after the air conditioner operates for a period of time, condensed water is generated on the surface of the indoor heat exchanger, so that the temperature value and the humidity value are obtained after the air conditioner operates for the set time, and the influence of dehumidification and bacteriostasis operations performed after the temperature and humidity detection is started on the refrigeration effect is avoided.
Further optionally, as shown in the flowchart of fig. 4, step S13 includes:
s131, when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load and humidity load are large, selecting an air supply mode of the air conditioner as an up-down air supply mode, and selecting a dehumidification mode as a non-cooling dehumidification mode;
specifically, when the humidity difference delta din is judged to be larger than the set humidity difference d1, and the temperature difference delta tin is judged to be larger than the set temperature difference t1, the indoor heat and humidity loads are relatively large, the air-conditioning refrigeration operation selects an air supply mode of simultaneously blowing air up and down, and cold air is simultaneously supplied through an upper air inlet and a lower air outlet to realize indoor rapid cooling; because the indoor wet load is relatively great, the air conditioner can reduce along with the indoor temperature by a wide margin at the in-process of refrigeration dehumidification, selects non-cooling dehumidification mode for guaranteeing indoor travelling comfort, combines the air supply mode of air-out simultaneously about the air conditioner, and the refrigeration of control part indoor heat transfer portion undertakes the function of cooling dehumidification, thereby the function of reheating air current is undertaken in the heating of surplus indoor heat transfer portion guarantees that the indoor temperature is stable.
S132, when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is smaller than or equal to the set temperature difference t1, determining that the current indoor heat load is small and the humidity load is large, selecting the air supply mode of the air conditioner as an upper air supply mode and selecting the dehumidification mode as a non-cooling dehumidification mode;
specifically, if the difference between the current indoor temperature tin of the room and the set temperature tc of the air conditioner is less than or equal to t1, it indicates that the indoor heat load is relatively small and the humidity load is relatively large, and the indoor heat load is relatively small, so that the air conditioner selects an air supply mode of single upward air outlet in refrigeration operation, and discomfort caused by direct blowing of cold air is avoided; because the indoor wet load is relatively large, in order to ensure indoor comfort, a non-cooling dehumidification mode is selected, an air supply mode of air outlet on an air conditioner is combined, a part of indoor heat exchange parts are controlled to refrigerate and undertake the functions of cooling and dehumidifying, and the rest of indoor heat exchange parts are heated and undertake the function of reheating air flow, so that the indoor temperature is stable.
S133, when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load is large and the current indoor humidity load is small, selecting the air supply mode of the air conditioner as an up-down air supply mode, and selecting the dehumidification mode as a cooling dehumidification mode;
specifically, if the difference between the current indoor temperature tin of the room and the set temperature tc of the air conditioner is greater than t1, it indicates that the indoor humidity load is relatively small and the heat load is relatively large, and the air conditioner with relatively large indoor heat load selects an air supply mode of air outlet from the upper part and the lower part at the same time, so that indoor rapid cooling is realized; because the indoor humidity load is relatively small, the air conditioner can bear the indoor humidity load only through refrigeration operation, special dehumidification is not needed, and the indoor air conditioner only needs to maintain the current refrigeration operation.
S134, when the humidity difference delta din is judged to be smaller than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be smaller than or equal to the set temperature difference t1, the current indoor heat load and humidity load are determined to be small, the air supply mode of the air conditioner is selected to be an upper air supply mode, and the dehumidification mode is a cooling dehumidification mode.
Specifically, if the difference between the current indoor temperature tin of the room and the set temperature tc of the air conditioner is less than or equal to t1, it indicates that the indoor heat and humidity loads are relatively small, and therefore the air supply mode of the air conditioner selects single upward air supply, and the effect that cold air does not blow people and cool air but does not cool air is achieved; because the indoor wet load is relatively small, the air conditioner can bear the indoor wet load only through refrigeration operation, and only needs to maintain the current refrigeration operation.
Further alternatively, in a specific embodiment, as shown in fig. 2, the indoor heat exchanger includes an upper heat exchange group 1, a middle heat exchange group 2, and a lower heat exchange group 3, which are arranged in sequence from top to bottom, and each heat exchange group includes at least one indoor heat exchange portion; in this embodiment, each heat exchange unit includes one indoor heat exchange portion as an example to explain the scheme, but the protection scope of the present invention cannot be limited thereby.
Specifically, when the humidity difference Δ din is judged to be larger than the set humidity difference d1, and the temperature difference Δ tin is judged to be larger than the set temperature difference t1, the upper heat exchange group 1 and the middle heat exchange group 2 are controlled to refrigerate, and the lower heat exchange group 3 is controlled to refrigerate; at this time, the upper part and the middle part of the indoor heat exchanger are used as evaporator parts to bear the functions of cooling and dehumidifying, the lower part of the indoor heat exchanger is used as a condenser part to bear the functions of reheating airflow, and due to the hot air floating principle, the effect of non-cooling and dehumidifying can be realized by the mode of mixing, heating and drying the air flow by cold air and hot air, and the specific implementation can be realized by controlling the third electromagnetic valve 32 in the figure 2 to be opened, the first electromagnetic valve 12 and the second electromagnetic valve 22 to be closed, the third throttle valve 31 to be closed, and the first throttle valve 1111 and the second throttle valve 21 to be opened.
When the humidity difference delta din is judged to be larger than the set humidity difference d1 and the temperature difference delta tin is not larger than the set temperature difference t1, the upper heat exchange group 1 is controlled to heat, and the middle heat exchange group 2 and the lower heating group are controlled to refrigerate; at the moment, the middle part and the lower part of the indoor heat exchanger are used as the evaporator part to bear the functions of cooling and dehumidifying, and the upper part of the indoor heat exchanger is used as the condenser part to bear the functions of reheating the air supply flow, so that the air supply flow with lower temperature can be heated and dried by the reheating module and then sent into the room when being sent out upwards, and the effect of cooling and dehumidifying is further realized. Implementation can be achieved by controlling the first solenoid valve 12 in fig. 2 to be open, the second solenoid valve 22 and the third solenoid valve 32 to be closed, the first throttle 1111 to be closed, and the second throttle 21 and the third throttle 31 to be open.
When the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, the upper heat exchange group 1, the middle heat exchange group 2 and the lower heating group are controlled to refrigerate; the upper part, the middle part and the lower part of the indoor heat exchanger are used as evaporators to realize a refrigeration function, and the specific implementation can be realized by controlling the first electromagnetic valve 12, the second electromagnetic valve 22 and the third electromagnetic valve 32 of the indoor heat exchanger to be closed at the same time and controlling the first throttle valve 1111, the second throttle valve 21 and the three throttle valves to be opened at the same time.
And when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be less than or equal to the set temperature difference t1, the upper heat exchange group 1, the middle heat exchange group 2 and the lower heating group are controlled to refrigerate. The upper part, the middle part and the lower part of the indoor heat exchanger are used as evaporators to realize a refrigeration function, and the specific implementation can be realized by controlling the first electromagnetic valve 12, the second electromagnetic valve 22 and the third electromagnetic valve 32 of the indoor heat exchanger to be closed at the same time and controlling the first throttle valve 1111, the second throttle valve 21 and the three throttle valves to be opened at the same time.
It should be noted that, the number and the opening and closing manner of the electromagnetic valves and the electronic expansion valves, the functional part division and the flow path arrangement of the indoor heat exchanger, and the like in this embodiment are not limited to the manners mentioned in this embodiment.
The present embodiments also propose a control device comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement the method of any one of the above when the program instructions are executed by the one or more processors.
The present embodiments also propose a non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are used to implement a method according to any of the above.
The embodiment also provides an air conditioner which adopts the refrigeration system, or adopts the method of any one of the above, or comprises the control device, or has the non-transitory computer readable storage medium.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A refrigeration system comprising an outdoor heat exchanger, a compressor, an indoor heat exchanger, and a plurality of throttling units; the indoor heat exchanger comprises a plurality of indoor heat exchange parts, a first end of each indoor heat exchange part is connected with the compressor, a second end of each indoor heat exchange part is connected with the throttling units in a one-to-one correspondence manner, each indoor heat exchange part and the corresponding throttling unit are connected in series to form a plurality of indoor branches and connected to the air suction end of the compressor and one end of the outdoor heat exchanger, which is far away from the compressor, and each throttling unit comprises a throttling valve and an electromagnetic valve which are connected in parallel;
the refrigerating system further comprises a control module, the refrigerating system comprises a plurality of dehumidification modes and a plurality of air supply modes, the air conditioner determines the current indoor heat and humidity load working condition according to the obtained indoor temperature value and the indoor humidity value in the refrigerating operation process, and selects the corresponding air supply mode and the dehumidification mode according to the determined heat and humidity load working condition.
2. A refrigeration system as recited in claim 1 wherein said refrigeration system is a heat pump refrigeration system.
3. A control method for a refrigeration system according to claim 1 or 2, wherein the refrigeration system includes a plurality of dehumidification modes and a plurality of air supply modes, the control method comprising:
and in the process of refrigerating operation, the air conditioner determines the current indoor heat and humidity load working condition according to the acquired indoor temperature value and indoor humidity value, and selects a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
4. A control method of a refrigeration system according to claim 3,
the multiple air supply modes comprise an upper air supply mode and a lower air supply mode and an upper air outlet mode, wherein the upper air outlet and the lower air outlet of the air conditioner are controlled to simultaneously output air in the upper air outlet mode, and only the upper air outlet of the air conditioner is controlled to output air in the upper air outlet mode;
the multiple dehumidification mode is including cooling dehumidification mode and non-cooling dehumidification mode, control all indoor heat transfer portion refrigeration and dehumidify in the cooling dehumidification mode, the refrigeration of the indoor heat transfer portion of control section in the non-cooling dehumidification mode, other indoor heat transfer portions heats and dehumidifies.
5. The control method of claim 4, wherein the cooling dehumidification mode controls all indoor heat exchange units to refrigerate and dehumidify, the non-cooling dehumidification mode controls part of the indoor heat exchange units to refrigerate and other indoor heat exchange units to heat and dehumidify, and the method comprises
In the cooling and dehumidifying mode, throttle valves of all indoor heat exchange parts are controlled to be opened, and electromagnetic valves are controlled to be closed;
in the non-cooling dehumidification mode, a throttle valve of part of indoor heat exchange parts is controlled to be opened, and an electromagnetic valve is controlled to be closed; and controlling the throttle valves of other indoor heat exchange parts to be closed and the electromagnetic valve to be opened.
6. The control method of the refrigeration system according to claim 5, wherein the determining a current indoor heat and humidity load condition according to the obtained indoor temperature value and the indoor humidity value, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load condition comprises
Obtaining an indoor current temperature value tin and a current humidity value din, and respectively calculating a temperature difference delta tin and a humidity difference delta din, wherein the temperature difference delta tin is | the current temperature value tin-a set temperature value tc |, and the humidity difference delta din is | the current humidity value din-a set humidity value dc |;
comparing the temperature difference delta tin with the set temperature difference t1 and the humidity difference delta din with the set humidity difference d 1;
and determining the current indoor heat and humidity load working condition according to the comparison result, and selecting a corresponding air supply mode and a corresponding dehumidification mode according to the determined heat and humidity load working condition.
7. The control method of claim 6, wherein the determining the current indoor heat and humidity load condition according to the comparison result and selecting the corresponding air supply mode and dehumidification mode according to the determined heat and humidity load condition comprises
When the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load and humidity load are large, selecting the air supply mode of the air conditioner as an up-down air supply mode and selecting the dehumidification mode as a non-cooling dehumidification mode;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is smaller than or equal to the set temperature difference t1, determining that the current indoor heat load is small and the current indoor humidity load is large, selecting the air supply mode of the air conditioner as an upper air supply mode and selecting the dehumidification mode as a non-cooling dehumidification mode;
when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, determining that the current indoor heat load is large and the current indoor humidity load is small, selecting the air supply mode of the air conditioner as an up-down air supply mode and selecting the dehumidification mode as a cooling dehumidification mode;
and when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be less than or equal to the set temperature difference t1, determining that the current indoor heat load and humidity load are small, selecting the air supply mode of the air conditioner as an upper air supply mode and selecting the dehumidification mode as a cooling dehumidification mode.
8. The control method of the refrigeration system according to claim 6, wherein the indoor heat exchanger comprises an upper heat exchange group, a middle heat exchange group and a lower heat exchange group which are arranged in sequence from top to bottom, and each heat exchange group comprises at least one indoor heat exchange part;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, the upper heat exchange group and the middle heat exchange group are controlled to refrigerate, and the lower heat exchange group is controlled to heat;
when the humidity difference delta din is larger than the set humidity difference d1 and the temperature difference delta tin is smaller than or equal to the set temperature difference t1, controlling the upper heat exchange group to heat and controlling the middle heat exchange group and the lower heating group to refrigerate;
when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is larger than the set temperature difference t1, the upper heat exchange group, the middle heat exchange group and the lower heating group are controlled to refrigerate;
and when the humidity difference delta din is judged to be less than or equal to the set humidity difference d1 and the temperature difference delta tin is judged to be less than or equal to the set temperature difference t1, the upper heat exchange group, the middle heat exchange group and the lower heating group are controlled to refrigerate.
9. A control apparatus comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions which, when executed by the one or more processors, are operable to implement the method of any one of claims 3-8.
10. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 3-8.
11. An air conditioner employing a refrigeration system as claimed in claim 1 or 2, or employing a method as claimed in any one of claims 3 to 8, or including a control device as claimed in claim 9, or having a non-transitory computer readable storage medium as claimed in claim 10.
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| CN114508786A (en) * | 2022-02-17 | 2022-05-17 | 珠海格力电器股份有限公司 | Air conditioning system, control method and control device of air conditioning system |
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