CN113983587B - Air conditioner and dehumidification method thereof - Google Patents

Air conditioner and dehumidification method thereof Download PDF

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Publication number
CN113983587B
CN113983587B CN202111439207.5A CN202111439207A CN113983587B CN 113983587 B CN113983587 B CN 113983587B CN 202111439207 A CN202111439207 A CN 202111439207A CN 113983587 B CN113983587 B CN 113983587B
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air conditioner
dehumidification
temperature
preset
dehumidification mode
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CN113983587A (en
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邓安哲
陈军宇
吕根贵
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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

Abstract

The invention discloses an air conditioner and a dehumidification method thereof, wherein the air conditioner comprises a refrigeration system, a compressor, an indoor fan, an electric auxiliary heating device and a throttling device; the controller is configured to: responding to the dehumidification operation of the air conditioner, controlling the air conditioner to operate for a preset refrigeration time according to a refrigeration mode, and controlling an indoor fan to operate at a preset low rotating speed; acquiring indoor temperature, and comparing the indoor temperature with a preset temperature threshold; acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature; and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature. By adopting the embodiment of the invention, the operating parameters of the air conditioning system can be quickly adjusted according to the indoor relative humidity condition, and the energy-saving effect is realized while dehumidification is carried out.

Description

Air conditioner and dehumidification method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a dehumidification method thereof.
Background
The basic operation principle of the air conditioner is generally consistent no matter in a refrigeration mode or a dehumidification mode, and indoor hot air and low-temperature refrigerant in a heat exchanger of an indoor unit of the air conditioner are subjected to heat exchange by utilizing the action of a fan of the indoor unit. Therefore, water vapor in the hot air is condensed into condensate water by the low-temperature refrigerant, the condensate water flows down to the water receiving tank through the heat exchanger fins, the condensate water is drained to the outside through the drain pipe at the bottom of the water receiving tank and is discharged, and meanwhile, cold air after heat exchange is blown out from an air outlet of the air conditioner.
The existing variable frequency air conditioner products are relatively simple in dehumidification function, the dehumidification function of most products is realized by controlling an air conditioner according to a set rule through the difference value between the indoor environment temperature and the dehumidification set temperature, the temperature is reduced along with the reduction of the dehumidification process, and particularly when the dehumidification is carried out at low temperature, the human body feels extremely uncomfortable due to the fact that the temperature is reduced too fast. The existing air conditioner is operated in most rooms with low air volume under the dehumidification function, the refrigeration capacity is low, the dehumidification effect is achieved, the difference of indoor temperature and humidity under different scene conditions is not considered, the adjustment capacity of a refrigeration system is limited, and therefore rapid and efficient dehumidification cannot be carried out, the comfort of a user is poor, and the energy-saving effect cannot be achieved.
Disclosure of Invention
The embodiment of the invention aims to provide an air conditioner and a dehumidification method thereof, which can quickly adjust the operation parameters of an air conditioning system according to the indoor relative humidity condition, and realize the energy-saving effect while dehumidifying.
To achieve the above object, an embodiment of the present invention provides an air conditioner, including:
a refrigerating system which comprises a compressor, an indoor fan, an electric auxiliary heating device and a throttling device and is used for carrying out heat exchange between refrigerant and indoor air in a compression type refrigerating cycle,
the controller is configured to:
responding to the dehumidification operation of the air conditioner, controlling the air conditioner to operate for a preset refrigeration time according to a refrigeration mode, and controlling the indoor fan to operate according to a preset low rotating speed;
the method comprises the steps of obtaining the indoor temperature of the environment where the air conditioner is located, and comparing the indoor temperature with a preset temperature threshold value;
acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature.
As an improvement of the above scheme, the real-time evaporation temperature obtaining mode includes one of the following modes:
the method comprises the steps of obtaining the suction pressure of a suction port of the compressor and inquiring a preset temperature and pressure comparison table according to the suction pressure;
the method is obtained by acquiring the outlet air pressure of the air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the outlet air pressure.
As an improvement of the above, the controller is further configured to:
acquiring the relative humidity of the environment where the air conditioner is located in the process that the air conditioner operates according to the dehumidification mode;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
As an improvement of the above scheme, the dehumidification mode includes a first dehumidification mode, and when the air conditioner works in the first dehumidification mode, the electric auxiliary heating device is started, the indoor fan is adjusted to a preset intermediate rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttle device is increased.
As an improvement of the above scheme, the dehumidification mode includes a second dehumidification mode, and when the air conditioner operates in the second dehumidification mode, the electric auxiliary heating device is turned off, the indoor fan is adjusted to a preset high rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttle device is increased.
In order to achieve the above object, an embodiment of the present invention further provides a dehumidification method of an air conditioner, including:
responding to the dehumidification operation of the air conditioner, controlling the air conditioner to operate for a preset refrigeration time according to a refrigeration mode, and controlling an indoor fan to operate at a preset low rotating speed;
the method comprises the steps of obtaining the indoor temperature of the environment where the air conditioner is located, and comparing the indoor temperature with a preset temperature threshold value;
acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
and adjusting parameters of a compressor, an indoor fan, an electric auxiliary heating device and a throttling device in the air conditioner until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature.
As an improvement of the above scheme, the real-time evaporation temperature obtaining mode includes one of the following:
the method comprises the steps of obtaining the suction pressure of a suction port of the compressor and inquiring a preset temperature and pressure comparison table according to the suction pressure;
the method is obtained by acquiring the air outlet pressure of an air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the air outlet pressure.
As an improvement of the above, the method further comprises:
acquiring the relative humidity of the environment where the air conditioner is located in the process that the air conditioner operates according to the dehumidification mode;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
As an improvement of the above scheme, the dehumidification mode includes a first dehumidification mode, and when the air conditioner works in the first dehumidification mode, the electric auxiliary heating device is started, the indoor fan is adjusted to a preset intermediate rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttle device is increased.
As an improvement of the above scheme, the dehumidification mode includes a second dehumidification mode, and when the air conditioner operates in the second dehumidification mode, the electric auxiliary heating device is turned off, the indoor fan is adjusted to a preset high rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttle device is increased.
Compared with the prior art, the air conditioner and the dehumidification method thereof in the embodiment of the invention control the air conditioner to continue to operate for a period of time according to the refrigeration mode when the dehumidification operation is started, then obtain the corresponding dehumidification mode according to the indoor temperature of the air conditioner, the different dehumidification modes have different control parameters of the refrigeration system, and control the operation parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device according to the control parameters, so that the detected real-time evaporation temperature in the current dehumidification mode is equal to the target evaporation temperature. The actual condition that evaporating temperature can be accurate reaction refrigerating system operation, the air conditioner is at the dehumidification in-process, and relatively speaking, evaporating temperature is lower, and the absorbed heat is just more to dehumidification effect is just better. Therefore, in the embodiment of the invention, the operation parameters of each module in the refrigeration system are correspondingly adjusted according to the target evaporation temperatures corresponding to different dehumidification modes, the operation parameters of the air conditioning system are quickly adjusted, and each module in the refrigeration system is in the optimal operation state without performing useless functions while dehumidifying, thereby achieving the effect of saving energy.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a dehumidification method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged. The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the ambient environment through the condensation process. The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner 100 according to an embodiment of the present invention, where the air conditioner 100 includes:
a refrigerating system 10 including a compressor 11, an indoor fan 12, an electric auxiliary heating device 13, and a throttling device 14, for performing heat exchange between refrigerant and indoor air in a compression-type refrigerating cycle,
the controller 20 is configured to:
in response to the dehumidification operation of the air conditioner 100, controlling the air conditioner 100 to operate in a refrigeration mode for a preset refrigeration time, and controlling the indoor fan 12 to operate at a preset low rotation speed;
acquiring the indoor temperature of the environment where the air conditioner 100 is located, and comparing the indoor temperature with a preset temperature threshold;
acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner 100 is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
and adjusting parameters of the compressor 11, the indoor fan 12, the electric auxiliary heating device 13 and the throttling device 14 until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature.
It is worth noting that the evaporation temperature is the temperature at which the liquid refrigerant boils. The practical refrigerating system has different evaporating temperatures, but the evaporating temperature of the refrigerant must be lower than the lowest temperature required by the cooled material, so that there is certain temperature difference between the refrigerant in the evaporator and the cooled material to ensure the driving force for heat transfer. Therefore, when the refrigerant is evaporated, the refrigerant can absorb heat from the cold materials, and low-temperature heat transfer is realized. And the pressure corresponding to the evaporation temperature is the evaporation pressure. When the refrigerant flow rate is constant, the lower the evaporation pressure is, the lower the evaporation temperature is, the larger the temperature difference with the heat load (hot air) is, the larger the cooling capacity is, in other words, the lower the evaporation pressure is, the larger the cooling capacity is, and the same refrigerant of the same quality is evaporated at different temperatures, and the latent heat of evaporation is different, and the lower the evaporation temperature is, the larger the latent heat of evaporation is, and the stronger the heat absorbing capacity is. The refrigerating system utilizes the characteristic that the boiling point of the refrigerant changes with the pressure to make the refrigerant vaporize and absorb the heat of the cooled substance under low pressure and reduce the temperature of the cooled substance to achieve the refrigerating purpose, and the vaporized refrigerant is condensed into liquid under high pressure. The circulation operation is carried out, and the purpose of adjusting the room temperature is achieved by means of the heat absorption and heat release processes of the refrigerant during state change.
Illustratively, the preset refrigeration time is 3min, and the temperature threshold is 25 ℃. When the air conditioner enters the dehumidification mode, the air conditioner firstly operates for 3min in the refrigeration mode, and the indoor fan 12 operates at low air volume. After the air conditioner operates stably after 3min, the controller actively acquires the indoor temperature, and when the indoor temperature T is less than 25 ℃, the controller operates and works according to a first dehumidification mode; when the indoor temperature T is more than or equal to 25 ℃, the operation is carried out according to a second dehumidification mode.
In an embodiment of the present invention, the real-time evaporation temperature obtaining method includes one of the following:
the method comprises the steps of obtaining the suction pressure of a suction port of the compressor 11 and inquiring a preset temperature and pressure comparison table according to the suction pressure;
the method is obtained by acquiring the air outlet pressure of an air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the air outlet pressure.
Illustratively, the suction pressure at the inlet of the compressor 11 is called suction pressure, which is close to the evaporation pressure, and the difference between the two is the flow resistance of the pipeline. For convenience, the evaporating pressure may be detected at the suction port of the compressor 11, which is commonly referred to as the suction pressure of the compressor 11, or at the outlet port of the evaporator. The purpose of detecting the suction pressure of the refrigeration system is to obtain the evaporation temperature of the refrigeration system, so as to obtain the operation condition of the refrigeration system. By looking up a refrigerant saturation temperature pressure look-up table (different saturation temperature pressures for different refrigerants).
Optionally, in the process that the air conditioner 100 operates in the dehumidification mode, obtaining the relative humidity of the environment where the air conditioner 100 is located;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor 11, the indoor fan 12, the electric auxiliary heating device 13 and the throttling device 14 until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
For example, in the operation process of the dehumidification mode, when a large change in the relative humidity of the indoor environment is detected, the operation parameters of the compressor 11, the indoor fan 12, the electric auxiliary heating device 13, and the throttling device 14 are further adjusted by readjusting the target evaporation temperature, so that the dehumidification mode is more suitable for the current indoor environment and stable dehumidification is maintained.
Further, in the operation process of the dehumidification mode, the temperature of the inner coil is continuously followed and monitored, and the anti-freezing protection function of the heat exchanger is prior to the evaporation temperature regulation function; namely, in the rapid and efficient dehumidification process, the temperature of the inner coil is continuously reduced, and if the temperature of the inner coil is lower than the anti-freezing and frequency-reducing temperature, the anti-freezing and frequency-reducing action is immediately carried out; if the temperature of the inner coil pipe rises to the anti-freezing and frequency-reducing temperature and meets related conditions, the frequency-increasing treatment is needed, and the anti-freezing and frequency-reducing action is immediately removed; and if the conditions meet the conditions of anti-freezing and frequency increasing, immediately performing anti-freezing and frequency increasing actions.
Optionally, the dehumidification mode includes a first dehumidification mode, when the air conditioner 100 operates in the first dehumidification mode, the electric auxiliary heating device 13 is started, the indoor fan 12 is adjusted to a preset middle rotation speed, the operation frequency of the compressor 11 is increased, and the valve opening of the throttle device 14 is increased.
For example, the controller sends out an instruction, outputs a target evaporation temperature of Te-2 ℃ (Te may be a preset fixed value, leaves the factory and is set at 1-5 ℃, and can be manually adjusted by a remote controller according to a use scene), and controls and adjusts parameters in the first dehumidification mode according to a preset logical corresponding relationship, wherein the electric auxiliary heating device 13 is turned on for use, the indoor fan 12 is adjusted to be in a stroke operation, the frequency of the compressor 11 is increased, the valve opening of the throttling device 14 is increased, and the flow rate of the system refrigerant is increased. Specifically, the outdoor fan and the compressor 11 operate in synchronization, and the electric auxiliary heating device 13 and the indoor fan 12 operate in synchronization (on/off operation). In the operation process of the first dehumidification mode, when the controller identifies that the relative humidity of the room reaches a humidity threshold (60% when the controller leaves a factory and can be manually adjusted), the controller sends an instruction to actively adjust the target evaporation temperature to be Te +2 ℃. And controlling and adjusting parameters in the first dehumidification mode through a preset logic corresponding relation, wherein the electric auxiliary heating device 13 is always started for use, the indoor fan 12 is adjusted to be in low-wind operation, the frequency of the compressor 11 is reduced, the valve opening of the throttling device 14 is reduced, and the flow of a system refrigerant is reduced.
Optionally, the dehumidification mode includes a second dehumidification mode, when the air conditioner 100 operates in the second dehumidification mode, the electric auxiliary heating device 13 is turned off, the indoor fan 12 is adjusted to a preset high rotation speed, the operation frequency of the compressor 11 is increased, and the valve opening of the throttle device 14 is increased.
Illustratively, the controller sends out an instruction, the output target evaporation temperature is Te-4 ℃ (the factory setting is 1-5 ℃, and the output target evaporation temperature can be manually adjusted by a remote controller according to the use scene), and the parameters in the second dehumidification mode are controlled and adjusted according to the preset logical control corresponding relation, wherein the indoor fan 12 is adjusted to be in high-wind operation, the frequency of the compressor 11 is increased, the valve opening of the throttling device 14 is increased, and the system refrigerant flow is increased. Specifically, the outdoor fan and the compressor 11 are operated in synchronization. In the operation process of the second dehumidification mode, when the controller identifies that the relative humidity of the room reaches a humidity threshold (60% when the controller leaves the factory), the controller sends an instruction to actively adjust the evaporation temperature to be Te +4 ℃, and controls and adjusts the parameters in the second dehumidification mode according to a preset logic control corresponding relation, wherein the indoor fan 12 is adjusted to be in low-wind operation, the frequency of the compressor 11 is reduced, the valve opening of the throttling device 14 is reduced, and the refrigerant flow of the system is reduced, so that the purpose of saving energy is achieved.
In the dehumidification process, the sampling period of the indoor tube temperature is the same as that of the real-time evaporation temperature, and generally, the sampling is performed once in 30-60 seconds, so that the real-time evaporation temperature can accurately control and adjust related parameters, and data sampling deviation between the real-time evaporation temperature and the anti-freezing function temperature parameters is avoided.
In the above dehumidification process, the meaning of the real-time evaporation temperature controlling and adjusting the parameters in the dehumidification mode through the preset logic control corresponding relationship means that in the control unit, the relation among the parameters such as the evaporation temperature, the frequency, the air volume, the valve opening degree of the throttling device 14 and the like is fitted into a related control logic formula, and a small program is formed and embedded into the program of the controller. The frequency can be presented in a mode of a plurality of fixed frequencies or in a mode of stepless speed regulation. However, no matter how the frequency modulation control is carried out, the control logic is always limited in the main control logic relationship of the air conditioner, namely, in terms of the priority relationship of the control, the main control logic relationship of the air conditioner is prior to the preset logic control corresponding relationship of the evaporation temperature, and similarly, the anti-freezing protection function of the heat exchanger is prior to the evaporation temperature regulation function.
In the dehumidification process, the operating frequency of the compressor 11 has a relationship with the difference between the indoor ambient temperature and the target temperature; if the operation frequency of the compressor 11 is represented by a fixed frequency, the frequency of the compressor 11 is corrected according to the difference between the indoor ambient temperature and the target temperature. The smaller the value of the temperature difference, the smaller the corrected frequency of the compressor 11; and the larger the value of the temperature difference, the higher the corrected frequency of the compressor 11.
In the dehumidification process, the adjustment range of the target evaporation temperature value is tested in an enthalpy difference laboratory, is verified in a user experience room, and is set to be a relatively safe and excellent value range by considering the difference of different products.
In the dehumidification process, the humidity threshold is tested in an enthalpy difference laboratory and is verified in a user experience room, particularly, people in different age groups experience the user, and the human body of most of people is set to have a value which is relatively comfortable. Of course, this value can be adjusted manually to facilitate the special requirements of different usage scenarios of the air conditioner.
Compared with the prior art, the air conditioner 100 according to the embodiment of the present invention controls the air conditioner to continue to operate in the cooling mode for a period of time when the air conditioner starts to perform the dehumidification operation, and then obtains the corresponding dehumidification mode according to the indoor temperature of the air conditioner, where different dehumidification modes have different control parameters of the cooling system, and controls the operation parameters of the compressor 11, the indoor fan 12, the electric auxiliary heating device 13, and the throttling device 14 according to the control parameters, so that the detected real-time evaporation temperature in the current dehumidification mode is equal to the target evaporation temperature. The actual condition that evaporating temperature can be accurate reaction refrigerating system operation, the air conditioner is at the dehumidification in-process, and relatively speaking, evaporating temperature is lower, and the absorbed heat is just more to dehumidification effect is just better. Therefore, in the embodiment of the invention, the operation parameters of each module in the refrigeration system are correspondingly adjusted according to the target evaporation temperatures corresponding to different dehumidification modes, the operation parameters of the air-conditioning system are quickly adjusted, and each module in the refrigeration system is in the optimal operation state without idle functions while dehumidification is carried out, so that the effect of saving energy is achieved.
Referring to fig. 2, fig. 2 is a flowchart of a dehumidification method of an air conditioner according to an embodiment of the present invention, where the dehumidification method of the air conditioner includes:
s1, responding to dehumidification operation of an air conditioner, controlling the air conditioner to run for preset refrigeration time according to a refrigeration mode, and controlling an indoor fan to run at a preset low rotating speed;
s2, obtaining the indoor temperature of the environment where the air conditioner is located, and comparing the indoor temperature with a preset temperature threshold value;
s3, acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
and S4, adjusting parameters of a compressor, an indoor fan, an electric auxiliary heating device and a throttling device in the air conditioner until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature.
Illustratively, the preset refrigeration time is 3min, and the temperature threshold is 25 ℃. When the air conditioner enters a dehumidification mode, the air conditioner firstly operates for 3min according to a refrigeration mode, and an indoor fan operates according to low air volume. After the air conditioner operates stably after 3min, the controller actively acquires the indoor temperature, and when the indoor temperature T is less than 25 ℃, the controller operates and works according to a first dehumidification mode; when the indoor temperature T is more than or equal to 25 ℃, the operation is carried out according to a second dehumidification mode.
In an embodiment of the present invention, the real-time evaporation temperature obtaining method includes one of the following:
the method comprises the steps that the suction pressure of a suction port of the compressor is obtained, and a preset temperature and pressure comparison table is inquired according to the suction pressure;
the method is obtained by acquiring the air outlet pressure of an air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the air outlet pressure.
Illustratively, the suction pressure at the suction port of the compressor is called the suction pressure, which is close to the evaporating pressure, and the difference between the two is the flow resistance of the piping. For convenience, the evaporating pressure may be sensed at the suction of the compressor, commonly referred to as the suction pressure of the compressor, or at the outlet of the evaporator. The purpose of detecting the suction pressure of the refrigeration system is to obtain the evaporating temperature of the refrigeration system, so as to obtain the operation condition of the refrigeration system. By looking up a refrigerant saturation temperature pressure look-up table (different saturation temperature pressures for different refrigerants).
Optionally, in a process that the air conditioner operates in the dehumidification mode, acquiring a relative humidity of an environment where the air conditioner is located;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
For example, in the operation process of the dehumidification mode, when a large change in the relative humidity of the indoor environment is detected, the operation parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device are further adjusted by readjusting the target evaporation temperature, so that the dehumidification mode is more suitable for the current indoor environment and stable dehumidification is maintained.
Further, in the operation process of the dehumidification mode, the temperature of the inner coil is continuously followed and monitored, and the anti-freezing protection function of the heat exchanger is prior to the evaporation temperature regulation function; namely, in the rapid and efficient dehumidification process, the temperature of the inner coil is continuously reduced, and if the temperature of the inner coil is lower than the anti-freezing and frequency-reducing temperature, the anti-freezing and frequency-reducing action is immediately carried out; if the temperature of the inner coil pipe rises to the anti-freezing and frequency-reducing temperature and meets related conditions, the frequency-increasing treatment is needed, and the anti-freezing and frequency-reducing action is immediately removed; and if the conditions meet the conditions of freezing prevention and frequency increase, immediately performing freezing prevention and frequency increase action.
Optionally, the dehumidification mode includes a first dehumidification mode, and when the air conditioner works in the first dehumidification mode, the electric auxiliary heating device is started, the indoor fan is adjusted to a preset intermediate rotation speed, the operation frequency of the compressor is increased, and the valve opening degree of the throttling device is increased.
Illustratively, the controller sends out an instruction, outputs a target evaporating temperature of Te-2 ℃ (Te may be a preset fixed value, and is set at 1-5 ℃ when leaving a factory, and may be manually adjusted by a remote controller according to a use scene), and controls and adjusts parameters in the first dehumidification mode according to a preset logical corresponding relationship, wherein the electric auxiliary heating device is turned on for use, the indoor fan is adjusted to be in a medium-stroke operation, the frequency of the compressor is increased, the valve opening of the throttling device is increased, and the refrigerant flow of the system is increased. Specifically, the outdoor fan and the compressor are operated synchronously, and the electric auxiliary heating device and the indoor fan are operated synchronously (on/off operation). In the operation process of the first dehumidification mode, when the controller identifies that the relative humidity of the room reaches a humidity threshold (60% when the controller leaves a factory and can be manually adjusted), the controller sends an instruction to actively adjust the target evaporation temperature to be Te +2 ℃. And controlling and adjusting parameters in the first dehumidification mode through a preset logic corresponding relation, wherein the electric auxiliary heating device is always started for use, the indoor fan is adjusted to be in low-wind operation, the frequency of the compressor is reduced, the valve opening of the throttling device is reduced, and the flow of a system refrigerant is reduced.
Optionally, the dehumidification mode includes a second dehumidification mode, and when the air conditioner works in the second dehumidification mode, the electric auxiliary heating device is turned off, the indoor fan is adjusted to a preset high rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttling device is increased.
Illustratively, the controller sends out an instruction, outputs a target evaporating temperature of Te-4 ℃ (factory setting is 1-5 ℃, and can be manually adjusted through a remote controller according to a use scene), and controls and adjusts parameters in the second dehumidification mode through a preset logic control corresponding relation, wherein the indoor fan is adjusted to be in high-wind operation, the frequency of the compressor is increased, the valve opening of the throttling device is increased, and the system refrigerant flow is increased. Specifically, the outdoor fan and the compressor are operated synchronously. In the operation process of the second dehumidification mode, when the controller identifies that the relative humidity of a room reaches a humidity threshold (60% is set when leaving a factory) and can be manually adjusted, the controller sends an instruction to actively adjust the evaporation temperature to Te +4 ℃, and the parameters in the second dehumidification mode are controlled and adjusted through a preset logic control corresponding relation, wherein an indoor fan is adjusted to be in low-wind operation, the frequency of a compressor is reduced, the valve opening of a throttling device is reduced, the refrigerant flow of a system is reduced, and therefore the purpose of saving energy is achieved.
Compared with the prior art, the air conditioner dehumidification method provided by the embodiment of the invention has the advantages that the air conditioner is controlled to continuously operate for a period of time according to the refrigeration mode when the dehumidification operation is started, then the corresponding dehumidification mode is obtained according to the indoor temperature of the air conditioner, different dehumidification modes have different control parameters of the refrigeration system, and the operation parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device are controlled according to the control parameters, so that the detected real-time evaporation temperature in the current dehumidification mode is equal to the target evaporation temperature. The actual condition that evaporating temperature can be accurate reaction refrigerating system operation, the air conditioner is at the dehumidification in-process, and relatively speaking, evaporating temperature is lower, and the absorbed heat is just more to dehumidification effect is just better. Therefore, in the embodiment of the invention, the operation parameters of each module in the refrigeration system are correspondingly adjusted according to the target evaporation temperatures corresponding to different dehumidification modes, the operation parameters of the air conditioning system are quickly adjusted, and each module in the refrigeration system is in the optimal operation state without performing useless functions while dehumidifying, thereby achieving the effect of saving energy.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (8)

1. An air conditioner, comprising:
a refrigerating system which comprises a compressor, an indoor fan, an electric auxiliary heating device and a throttling device and is used for carrying out heat exchange between refrigerant and indoor air in a compression type refrigerating cycle,
the controller is configured to:
responding to the dehumidification operation of the air conditioner, controlling the air conditioner to operate for a preset refrigeration time according to a refrigeration mode, and controlling the indoor fan to operate according to a preset low rotating speed;
the method comprises the steps of obtaining the indoor temperature of the environment where the air conditioner is located, and comparing the indoor temperature with a preset temperature threshold value;
acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature
Wherein, the real-time evaporation temperature acquisition mode comprises one of the following modes:
the method comprises the steps that the suction pressure of a suction port of the compressor is obtained, and a preset temperature and pressure comparison table is inquired according to the suction pressure;
the method is obtained by acquiring the air outlet pressure of an air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the air outlet pressure.
2. The air conditioner of claim 1, wherein the controller is further configured to:
acquiring the relative humidity of the environment where the air conditioner is located in the process that the air conditioner operates in the dehumidification mode;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
3. The air conditioner of claim 1, wherein the dehumidification mode includes a first dehumidification mode, and when the air conditioner operates in the first dehumidification mode, the electric auxiliary heating device is activated, the indoor fan is adjusted to a preset middle rotation speed, the operation frequency of the compressor is increased, and the valve opening of the throttle device is increased.
4. The air conditioner according to claim 1, wherein the dehumidification mode includes a second dehumidification mode, and when the air conditioner operates in the second dehumidification mode, the electric auxiliary heating device is turned off, and the indoor fan is adjusted to a preset high rotation speed, increasing an operation frequency of the compressor, and increasing a valve opening degree of the throttle device.
5. A dehumidification method of an air conditioner is characterized by comprising the following steps:
responding to the dehumidification operation of the air conditioner, controlling the air conditioner to operate for a preset refrigeration time according to a refrigeration mode, and controlling an indoor fan to operate at a preset low rotating speed;
the method comprises the steps of obtaining the indoor temperature of the environment where the air conditioner is located, and comparing the indoor temperature with a preset temperature threshold value;
acquiring a corresponding dehumidification mode according to the comparison result; the air conditioner is preset with a plurality of dehumidification modes, and each dehumidification mode has a corresponding target evaporation temperature;
adjusting parameters of a compressor, an indoor fan, an electric auxiliary heating device and a throttling device in the air conditioner until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the target evaporation temperature;
the real-time evaporation temperature acquisition mode comprises one of the following modes:
the method comprises the steps that the suction pressure of a suction port of the compressor is obtained, and a preset temperature and pressure comparison table is inquired according to the suction pressure;
the method is obtained by acquiring the air outlet pressure of an air outlet of the evaporator and inquiring a preset temperature and pressure comparison table according to the air outlet pressure.
6. The dehumidifying method of an air conditioner according to claim 5, wherein the method further comprises:
acquiring the relative humidity of the environment where the air conditioner is located in the process that the air conditioner operates in the dehumidification mode;
when the relative humidity reaches a humidity threshold value corresponding to the dehumidification mode, adjusting the target evaporation temperature according to an evaporation temperature adjustment strategy corresponding to the dehumidification mode;
and adjusting parameters of the compressor, the indoor fan, the electric auxiliary heating device and the throttling device until the real-time evaporation temperature in the current dehumidification mode is detected to be equal to the adjusted target evaporation temperature.
7. The dehumidifying method of claim 5 wherein the dehumidifying mode comprises a first dehumidifying mode, and when the air conditioner operates in the first dehumidifying mode, the electric auxiliary heating device is activated, the indoor fan is adjusted to a preset middle rotation speed, the operating frequency of the compressor is increased, and the valve opening of the throttle device is increased.
8. The dehumidifying method of claim 5 wherein the dehumidifying mode includes a second dehumidifying mode, and when the air conditioner operates in the second dehumidifying mode, the electric auxiliary heating device is turned off, the indoor fan is adjusted to a preset high rotation speed, the operating frequency of the compressor is increased, and the valve opening of the throttle device is increased.
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