CN114811876B - Air conditioner and control method thereof - Google Patents

Air conditioner and control method thereof Download PDF

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Publication number
CN114811876B
CN114811876B CN202210427402.4A CN202210427402A CN114811876B CN 114811876 B CN114811876 B CN 114811876B CN 202210427402 A CN202210427402 A CN 202210427402A CN 114811876 B CN114811876 B CN 114811876B
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Prior art keywords
fresh air
temperature
controlling
heat exchanger
opened
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CN114811876A (en
Inventor
朱磊
邹海如
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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
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioner and a control method thereof, comprising the following steps: an outdoor unit having a fresh air heat exchanger and a fresh air fan; a refrigerant circulation circuit; a compressor; a fresh air system; an indoor temperature sensor; an outdoor temperature sensor; the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature; a first temperature difference of the above temperatures; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and the preset temperature threshold value. According to the invention, based on the temperature difference between the indoor environment temperature and the outdoor environment temperature, the fresh air system and the fresh air heat exchanger are controlled to work, the temperature difference is reduced by introducing fresh air, the compressor is not required to be always in an on state, the energy is saved, and the fresh air is pre-cooled or preheated through the fresh air heat exchanger when the air conditioner is in different operation modes, so that the problems of a fresh air pipeline and indoor condensation caused by large temperature difference are avoided, and the comfort of a user is improved.

Description

Air conditioner and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
At present, when the fresh air conditioner works normally, air can be directly introduced from the outdoor environment, however, when the temperature difference between the indoor environment temperature and the outdoor environment temperature is large, condensation is easy to generate when the air is introduced from the outdoor environment, and the user experience is poor. And, rely on the compressor to adjust the indoor environment temperature all the time, result in the energy-conserving nature of the air conditioner relatively poor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art.
Therefore, a first object of the present invention is to provide an air conditioner, which controls the working states of a fresh air heat exchanger and a fresh air system according to the relation between a first temperature difference and a preset temperature threshold, so as to control the working of the fresh air system when the temperature difference between the indoor environment temperature and the outdoor environment temperature is large, reduce the temperature difference by introducing fresh air, avoid the compressor to be always in an on state, save more energy, and avoid the problem of the larger temperature difference, which leads to the fresh air pipeline and the indoor condensation, when the air conditioner is in different operation modes, the fresh air is precooled or preheated by the fresh air heat exchanger, thereby improving the user comfort.
To this end, a second object of the present invention is to propose a control method of an air conditioner.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an air conditioner, including: an outdoor unit having at least a fresh air heat exchanger and a fresh air fan; a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the electromagnetic expansion valve, the evaporator, the four-way valve and the pressure reducer; the compressor is used for compressing the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser; the fresh air system enables fresh air to pass through the fresh air pipeline, and introduces fresh air from outdoor to indoor under the action of the fresh air motor; the indoor temperature sensor is used for acquiring indoor environment temperature; the outdoor temperature sensor is used for acquiring outdoor environment temperature; the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the air conditioner set temperature; calculating a first temperature difference between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
According to the air conditioner provided by the embodiment of the invention, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, and the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an on state, the air conditioner is more energy-saving, and when the air conditioner is in different operation modes, the fresh air is precooled or preheated through the fresh air heat exchanger, the problem that the temperature difference value is large, and the fresh air pipeline and the indoor condensation are caused is avoided, and therefore, the user comfort is improved.
In some embodiments, the controller is further configured to obtain a set temperature of the air conditioner, and when determining that the current operation mode of the air conditioner is a cooling mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from the outdoor through the fresh air pipeline; when the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the air conditioner set temperature; when the first temperature difference value does not exceed the second preset temperature threshold value, the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the relation between the indoor environment temperature and the air conditioner set temperature, wherein the first preset temperature threshold value is larger than the second preset temperature threshold value.
In some embodiments, the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from outdoors through the fresh air pipeline; when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline; when the second temperature difference value does not exceed the fourth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, after the compressor operates for a second preset time, the fresh air system is controlled to be opened, and fresh air is introduced from outdoors through the fresh air pipeline, wherein the third preset temperature threshold value is larger than the fourth preset temperature threshold value.
In some embodiments, the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference value does not exceed the second preset temperature threshold value, specifically: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened so as to introduce fresh air from the outside through the fresh air pipeline; when the second temperature difference exceeds the fifth preset temperature threshold, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the third preset time, the fresh air system is controlled to be opened, so that fresh air is introduced from the outside through the fresh air pipeline.
In some embodiments, when determining that the current operation mode of the air conditioner is a heating mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to the relationship between the first temperature difference value and at least one preset temperature threshold, specifically: when the first temperature difference exceeds a sixth preset temperature threshold, controlling the electromagnetic expansion valve to be opened and controlling the fresh air system to be opened so as to heat the fresh air with lower temperature introduced from the fresh air pipeline by adopting the fresh air heat exchanger; when the first temperature difference value does not exceed the sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, and the fresh air system is controlled to be opened, so that fresh air with lower temperature is introduced from the outside through the fresh air pipeline, and the humidity of indoor environment air is increased.
In some embodiments, the controller is specifically configured to: the self-cleaning function of the fresh air heat exchanger is controlled to be started, and the method specifically comprises the following steps: the method comprises the steps of controlling the compressor and the electromagnetic expansion valve to be opened, and controlling the fresh air fan to repeatedly execute preset actions, wherein the preset actions comprise: and stopping the fourth preset time after the third preset time is controlled to run, so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides a control method of an air conditioner, the method comprising: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the air conditioner set temperature; calculating a first temperature difference between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
According to the control method of the air conditioner, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, and the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, a compressor is not required to be always in an on state, more energy is saved, and when the air conditioner is in different operation modes, the fresh air is precooled or preheated through the fresh air heat exchanger, the problem that a fresh air pipeline and indoor condensation are caused due to the fact that the temperature difference value is large is avoided, and therefore user comfort is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a block diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a system configuration diagram of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner in a cooling operation of the air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of an air conditioner in a heating operation of the air conditioner according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioner at the time of self-cleaning of the air conditioner according to an embodiment of the present invention;
fig. 6 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 7 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 8 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 9 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
Fig. 10 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Reference numerals: an outdoor unit 10; a refrigerant circulation circuit 11; a compressor 12; a fresh air system 13; an indoor temperature sensor 14; an outdoor temperature sensor 15; a controller 16; a fresh air heat exchanger 101; a fresh air fan 102; a condenser 111; a solenoid expansion valve 112; an evaporator 113; a four-way valve 114; fresh air duct 130.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The air conditioner of the present invention performs a refrigerating 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 a 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 heat is released to the surrounding 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 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
An air conditioner according to an embodiment of the present invention is described below with reference to fig. 1, and as shown in fig. 1, the air conditioner according to an embodiment of the present invention includes: an outdoor unit 10, a refrigerant circulation circuit 11, a compressor 12, a fresh air system 13, an indoor temperature sensor 14, an outdoor temperature sensor 15, and a controller 16.
Wherein, the outdoor unit 10 is provided with at least a fresh air heat exchanger 101 and a fresh air fan 102; the refrigerant circulation circuit 11 circulates a refrigerant in a circuit composed of a compressor 12, a condenser 111, an electromagnetic expansion valve 112, an evaporator 113, a four-way valve 114, and a pressure reducer;
the compressor 12 is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser; the fresh air system 13 enables fresh air to pass through the fresh air pipeline 130, and introduces fresh air from outdoor to indoor under the action of a fresh air motor; the indoor temperature sensor 14 is used for acquiring indoor environment temperature; the outdoor temperature sensor 15 is used for acquiring outdoor environment temperature; the controller 16 is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the air conditioner set temperature; calculating a first temperature difference between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference and at least one preset temperature threshold.
Exemplary, as shown in fig. 2, a system structure of an air conditioner according to an embodiment of the present invention is schematically shown. When the air conditioner is used for refrigerating, the refrigerating cycle of the compressor is started, the indoor environment temperature and the outdoor environment temperature are obtained, the indoor environment temperature is recorded as T1, the outdoor environment temperature is recorded as T4, the temperature difference between the indoor environment temperature and the outdoor environment temperature is calculated, namely, the first temperature difference between the T1 and the T4 is recorded as T1-T4, the relation between the first temperature difference and a preset temperature threshold is compared, the working states of the fresh air ventilator and the fresh air system are controlled according to the relation between the first temperature difference and at least one preset temperature threshold, for example, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the sterilization and dust removal functions are played, the fresh air system is controlled to be started, fresh air is introduced from the outside, the indoor environment temperature is regulated, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, condensation is prevented from being generated, the indoor environment temperature is reduced through introducing fresh air, the compressor is not required to be controlled to be always started, the energy consumption is reduced, and the energy consumption is saved.
When the air conditioner heats, the compressor is started in a heating cycle, the indoor environment temperature and the outdoor environment temperature are obtained, the working states of the fresh air heat exchanger and the fresh air system are controlled according to the first temperature difference value of the indoor environment temperature and the outdoor environment temperature so as to preheat fresh air in advance, the difference value between the indoor environment temperature and the outdoor environment temperature is reduced, the problems of a fresh air pipeline and indoor condensation caused by overlarge temperature difference between the indoor environment temperature and the outdoor environment temperature are avoided, and user comfort is improved.
According to the air conditioner provided by the embodiment of the invention, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, and the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an on state, the air conditioner is more energy-saving, and when the air conditioner is in different operation modes, the fresh air is precooled or preheated through the fresh air heat exchanger, the problem that the temperature difference value is large, and the fresh air pipeline and the indoor condensation are caused is avoided, and therefore, the user comfort is improved.
In some embodiments, the controller is further configured to obtain a set temperature of the air conditioner, and when determining that the current operation mode of the air conditioner is a cooling mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from the outside through a fresh air pipeline; when the first temperature difference value is between a first preset temperature threshold value and a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner; when the first temperature difference value does not exceed a second preset temperature threshold value, the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is larger than the second preset temperature threshold value.
In an embodiment, when the first temperature difference exceeds a first preset temperature threshold, for example, T1-T4 exceeds 15 ℃, the temperature difference between the indoor environment temperature and the outdoor environment temperature is considered to be larger, that is, the outdoor environment temperature is lower, at this time, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is started, the compressor and the fresh air system are controlled to be opened, and after the compressor is operated for a first preset time, for example, 15 minutes, the compressor is controlled to be stopped, after the fresh air system is opened, fresh air with lower temperature is introduced from the outdoor because the outdoor environment temperature is lower, so that the indoor environment temperature is reduced, the compressor is not required to be always in an opened state, and the energy conservation performance is higher.
When the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, for example, T1-T4 is between-5 ℃ and 15 ℃, the outdoor environment temperature is considered not very low, the effect of reducing the indoor environment temperature is not very good only by introducing outdoor fresh air, at the moment, the relation between the first temperature difference and the set temperature of the air conditioner is compared, and the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the difference between the first temperature difference and the set temperature of the air conditioner so as to control the indoor environment temperature.
When the first temperature difference value does not exceed a second preset temperature threshold value, for example, T1-T4 does not exceed-5 ℃, the outdoor environment temperature is considered to be higher, at the moment, the relation between the first temperature difference value and the set temperature of the air conditioner is compared, and the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the difference value between the first temperature difference value and the set temperature of the air conditioner so as to control the indoor environment temperature.
In some embodiments, the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from outdoors through the fresh air pipeline; when the second temperature difference value is between a fourth preset temperature threshold value and a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline; when the second temperature difference value does not exceed a fourth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the compressor operates for a second preset time, the fresh air system is controlled to be opened so as to introduce fresh air from outdoors through the fresh air pipeline, wherein the third preset temperature threshold value is larger than the fourth preset temperature threshold value.
In an embodiment, when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, i.e. T1-T4 is between-5 ℃ and 15 ℃, it is necessary to compare the relation between the indoor ambient temperature and the air conditioner set temperature, e.g. noted as Ts.
Specifically, a second temperature difference between the indoor environment temperature T1 and the air conditioner set temperature Ts is calculated, for example, the second temperature difference is recorded as T1-Ts, the relation between the second temperature difference and a preset temperature threshold is compared, when the second temperature difference exceeds a third preset temperature threshold, for example, T1-Ts exceeds 8 ℃, the air conditioner set temperature is considered to be lower, an electromagnetic expansion valve is controlled to be opened, a self-cleaning function of a fresh air heat exchanger is controlled to be started, a compressor is started, refrigeration is carried out by the compressor, a fresh air system is controlled to be closed, fresh air is stopped from being introduced from the outside through a fresh air pipeline, so that the indoor environment problem is reduced rapidly, and the fresh air heat exchanger is started to sterilize and remove dust indoors, so that the health of users is ensured.
When the second temperature difference is between the fourth preset temperature threshold and the third preset temperature threshold, for example, T1-Ts is between 1 ℃ and 8 ℃, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the compressor is controlled to be started, the fresh air system is controlled to be opened, fresh air is introduced from the outdoor through the fresh air pipeline, it is understood that when T1-Ts is between 1 ℃ and 8 ℃, the air conditioner set temperature is considered to be higher, that is, when the air conditioner runs at refrigeration, the air conditioner set temperature is smaller than the indoor environment temperature, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the compressor is controlled to be started, and the fresh air system is controlled to be started, so that the indoor environment temperature is reduced to the air conditioner set temperature.
When the second temperature difference value does not exceed a fourth preset temperature threshold value, for example, T1-Ts does not exceed 1 ℃, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the compressor is started, the fresh air system is controlled to be opened after the compressor operates for a second preset time, for example, 15 minutes, so that fresh air is introduced from the outside through the fresh air pipeline, and after the compressor operates for the second preset time, the fresh air system is controlled to be opened so that fresh air is introduced from the outside through the fresh air pipeline, and the indoor environment temperature is reduced because the set temperature of the air conditioner is lower.
In some embodiments, the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference value does not exceed the second preset temperature threshold value, specifically: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened so as to introduce fresh air from outdoors through the fresh air pipeline; when the second temperature difference exceeds a fifth preset temperature threshold, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the third preset time, the fresh air system is controlled to be opened, so that fresh air is introduced from the outside through the fresh air pipeline.
In an embodiment, when the first temperature difference does not exceed a second preset temperature threshold, for example, T1-T4 does not exceed-5 ℃, a second temperature difference between the indoor environment temperature and the set temperature of the air conditioner is calculated, for example, a difference between T1-Ts is calculated, and according to a relationship between the difference between T1-Ts and the preset temperature threshold, the working states of the indoor heat exchanger and the fresh air system are controlled.
For example, when the second temperature difference does not exceed the fifth preset temperature threshold, for example, the second temperature difference does not exceed 8 ℃, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, the fresh air system is controlled to be opened, and fresh air is introduced from the outside through the fresh air pipeline, so that the indoor environment temperature is reduced.
When the second temperature difference exceeds a fifth preset temperature threshold, for example, the second temperature difference exceeds 8 ℃, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the compressor is started, and after a third preset time, for example, 20 minutes, the fresh air system is controlled to be started, so that fresh air is introduced from the outside through the fresh air pipeline, and the indoor environment temperature is reduced. It can be understood that the fresh air system comprises a fresh air fan, a fresh air motor and a fresh air pipeline, and fresh air in an outdoor environment is introduced from the outside through the fresh air pipeline under the action of the fresh air motor, and indoor mixed air can be discharged outdoors by utilizing micro-positive pressure.
For example, as shown in fig. 3, a flowchart of a control method of an air conditioner during a cooling operation of the air conditioner according to an embodiment of the invention is shown.
Step S11, the air conditioner operates in a refrigeration mode.
Step S12, starting the compressor.
Step S13, obtaining the indoor environment temperature, the outdoor environment temperature and the air conditioner set temperature.
Step S14, calculating a first temperature difference between the indoor environment temperature and the outdoor environment temperature.
In step S15, the first temperature difference exceeds a first preset temperature threshold.
And S16, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be started, and controlling the compressor to stop after the compressor is started for a first preset time.
In step S17, the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold.
Step S18, calculating a second temperature difference value between the indoor environment temperature and the air conditioner set temperature.
And S19, when the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, and controlling the fresh air system to be closed.
And step S20, when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened.
And S21, when the second temperature difference value does not exceed a fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened after the compressor operates for a second preset time.
In step S22, the first temperature difference does not exceed the second preset temperature threshold.
Step S23, calculating a second temperature difference value between the indoor environment temperature and the air conditioner set temperature.
And step S24, when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened.
And S25, when the second temperature difference exceeds a fifth preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened after the third preset time.
In some embodiments, when determining that the current operation mode of the air conditioner is a heating mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to the relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference exceeds a sixth preset temperature threshold, controlling the electromagnetic expansion valve to be opened and controlling the fresh air system to be opened so as to heat the fresh air with lower temperature introduced from the fresh air pipeline by adopting the fresh air heat exchanger; when the first temperature difference value does not exceed a sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, and the fresh air system is controlled to be opened, so that fresh air with lower temperature is introduced from the outside through the fresh air pipeline, and the humidity of indoor environment air is increased.
In the embodiment, when the air conditioner heats, the compressor is started in a heating cycle, the magnitude relation between the first temperature difference value and the preset temperature threshold value is compared, when the first temperature difference value exceeds the sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the fresh air system is controlled to be opened, the fresh air heat exchanger is adopted to heat the fresh air with lower temperature introduced from the fresh air pipeline, the fresh air entering the room is preheated in advance, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, the phenomenon that the indoor hot air encounters an object cooled by the outdoor fresh air is avoided, and the comfort of a user is improved.
When the first temperature difference value does not exceed a sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the fresh air system is controlled to be opened, fresh air with lower temperature is introduced from the outside through the fresh air pipeline, the humidity of indoor environment air is increased, the effect of anhydrous humidification is achieved through introducing the outdoor fresh air, and the comfort of a user is improved.
For example, as shown in fig. 4, a flowchart of a control method of an air conditioner during heating operation of the air conditioner according to an embodiment of the invention is shown.
Step S30, the air conditioner operates the heating mode.
Step S31, starting the compressor.
Step S32, acquiring indoor environment temperature and outdoor environment temperature.
Step S33, judging whether the indoor environment temperature and the outdoor environment exceed a sixth preset temperature threshold, if yes, executing step S34, otherwise, executing step S35.
And step S34, controlling the electromagnetic expansion valve to be opened and controlling the fresh air system to be opened so as to heat the fresh air with lower temperature introduced from the fresh air pipeline by adopting the fresh air heat exchanger.
Step S35, controlling the electromagnetic expansion valve to be opened and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outside through the fresh air pipeline to increase the humidity of indoor environment air.
In some embodiments, the controller is specifically configured to: the self-cleaning function of the fresh air heat exchanger is controlled to be started, and the method specifically comprises the following steps: the method comprises the steps of controlling the opening of a compressor and an electromagnetic expansion valve, and controlling a fresh air fan to repeatedly execute preset actions, wherein the preset actions comprise: and stopping the fourth preset time after the fresh air fan is controlled to run for the third preset time, so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
In an embodiment, when the air conditioner is in refrigeration operation, the compressor and the electromagnetic expansion valve are controlled to be opened, the fresh air fan is operated for a second preset time, for example, for 3 minutes, and then stopped for a fourth preset time, for example, for 7 minutes, and repeated execution is performed, so that the fresh air fan can clean by utilizing condensed water generated by the fresh air heat exchanger in the process of frosting and defrosting, and therefore, the effects of filtering air dust and sterilizing are achieved.
For example, as shown in fig. 5, a flowchart of a control method of an air conditioner during self-cleaning of the air conditioner according to an embodiment of the invention is shown.
Step S40, the air conditioner operates in a cooling mode.
In step S41, the compressor and the electromagnetic expansion valve are opened.
Step S42, the fresh air fan is operated for a third preset time.
In step S43, the fresh air fan is stopped for a fourth preset time.
And S44, controlling the fresh air fan to repeatedly execute the actions.
According to the air conditioner provided by the embodiment of the invention, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, and the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an on state, the air conditioner is more energy-saving, and when the air conditioner is in different operation modes, the fresh air is precooled or preheated through the fresh air heat exchanger, the problem that the temperature difference value is large, and the fresh air pipeline and the indoor condensation are caused is avoided, and therefore, the user comfort is improved.
The following describes a control method of an air conditioner according to an embodiment of the present invention.
As shown in fig. 6, the operation method of the air conditioner according to the embodiment of the present invention at least includes steps S1 to S13.
Step S1, determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature.
In an embodiment, when the air conditioner is refrigerating, the compressor refrigeration cycle is started, and the indoor environment temperature and the outdoor environment temperature are acquired, wherein the indoor environment temperature is denoted as T1, and the outdoor environment temperature is denoted as T4.
Step S2, calculating a first temperature difference value between the indoor environment temperature and the outdoor environment temperature.
In an embodiment, a temperature difference between the indoor ambient temperature and the outdoor ambient temperature, i.e. a first temperature difference between T1 and T4, is calculated, e.g. denoted as T1-T4.
And step S3, controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
In an embodiment, the relation between the first temperature difference and the preset temperature threshold is compared, and according to the relation between the first temperature difference and at least one preset temperature threshold, the working states of the fresh air ventilator and the fresh air system are controlled, for example, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the functions of sterilization and dust removal are achieved, the fresh air system is controlled to be started, fresh air is introduced from the outside, the indoor environment temperature is regulated, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, condensation is prevented from being generated, and the indoor environment temperature is reduced by introducing the fresh air, the compressor is not required to be always started, the energy consumption is reduced, and the function of saving energy consumption is achieved.
According to the control method of the air conditioner, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, and the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, a compressor is not required to be always in an on state, more energy is saved, and when the air conditioner is in different operation modes, the fresh air is precooled or preheated through the fresh air heat exchanger, the problem that a fresh air pipeline and indoor condensation are caused due to the fact that the temperature difference value is large is avoided, and therefore user comfort is improved.
In some embodiments, as shown in fig. 7, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. Acquiring the set temperature of the air conditioner, and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value when the current operation mode of the air conditioner is the refrigeration mode, wherein the method comprises the following steps: when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from the outside through a fresh air pipeline; when the first temperature difference value is between a first preset temperature threshold value and a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner; when the first temperature difference value does not exceed a second preset temperature threshold value, the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is larger than the second preset temperature threshold value.
In some embodiments, as shown in fig. 8, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When the first temperature difference is between a first preset temperature threshold and a second preset temperature threshold, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the air conditioner set temperature, wherein the working states comprise: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from outdoors through the fresh air pipeline; when the second temperature difference value is between a fourth preset temperature threshold value and a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline; when the second temperature difference value does not exceed a fourth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the compressor operates for a second preset time, the fresh air system is controlled to be opened so as to introduce fresh air from outdoors through the fresh air pipeline, wherein the third preset temperature threshold value is larger than the fourth preset temperature threshold value.
In some embodiments, as shown in fig. 9, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from outdoors through a fresh air pipeline, comprising: calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened so as to introduce fresh air from outdoors through the fresh air pipeline; when the second temperature difference exceeds a fifth preset temperature threshold, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the third preset time, the fresh air system is controlled to be opened, so that fresh air is introduced from the outside through the fresh air pipeline.
In some embodiments, as shown in fig. 10, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When the current operation mode of the air conditioner is determined to be a heating mode, when the first temperature difference exceeds a sixth preset temperature threshold, controlling an electromagnetic expansion valve to be opened, and controlling a fresh air system to be opened so as to heat fresh air with lower temperature introduced from a fresh air pipeline by adopting a fresh air heat exchanger; when the first temperature difference value does not exceed a sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, and the fresh air system is controlled to be opened, so that fresh air with lower temperature is introduced from the outside through the fresh air pipeline, and the humidity of indoor environment air is increased.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. An air conditioner, comprising:
an outdoor unit having at least a fresh air heat exchanger and a fresh air fan;
a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the electromagnetic expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
The fresh air system enables fresh air to pass through the fresh air pipeline, and introduces fresh air from outdoor to indoor under the action of the fresh air motor;
the indoor temperature sensor is used for acquiring indoor environment temperature;
the outdoor temperature sensor is used for acquiring outdoor environment temperature;
the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature;
calculating a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature;
controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value;
the controller is further configured to obtain a set temperature of the air conditioner, and when determining that the current operation mode of the air conditioner is a refrigeration mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference value and at least one preset temperature threshold, specifically including:
when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from the outdoor through the fresh air pipeline;
When the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the air conditioner set temperature;
when the first temperature difference value does not exceed the second preset temperature threshold value, the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the relation between the indoor environment temperature and the air conditioner set temperature, wherein the first preset temperature threshold value is larger than the second preset temperature threshold value.
2. The air conditioner according to claim 1, wherein the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically:
calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature;
When the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from outdoors through the fresh air pipeline;
when the second temperature difference value is between a fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline;
when the second temperature difference value does not exceed the fourth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, after the compressor operates for a second preset time, the fresh air system is controlled to be opened, and fresh air is introduced from outdoors through the fresh air pipeline, wherein the third preset temperature threshold value is larger than the fourth preset temperature threshold value.
3. The air conditioner according to claim 1, wherein the controller is specifically configured to control the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference does not exceed the second preset temperature threshold, specifically:
Calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature;
when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened so as to introduce fresh air from the outside through the fresh air pipeline;
when the second temperature difference exceeds the fifth preset temperature threshold, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the third preset time, the fresh air system is controlled to be opened, so that fresh air is introduced from the outside through the fresh air pipeline.
4. The air conditioner according to claim 1, wherein when it is determined that the current operation mode of the air conditioner is a heating mode, the controller is specifically configured to control the working states of the fresh air heat exchanger and the fresh air system according to the relationship between the first temperature difference value and at least one preset temperature threshold, specifically:
when the first temperature difference exceeds a sixth preset temperature threshold, controlling the electromagnetic expansion valve to be opened and controlling the fresh air system to be opened so as to heat the fresh air with lower temperature introduced from the fresh air pipeline by adopting the fresh air heat exchanger;
When the first temperature difference value does not exceed the sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, and the fresh air system is controlled to be opened, so that fresh air with lower temperature is introduced from the outside through the fresh air pipeline, and the humidity of indoor environment air is increased.
5. The air conditioner according to any one of claims 1 to 4, wherein the controller is specifically configured to:
the self-cleaning function of the fresh air heat exchanger is controlled to be started, and the method specifically comprises the following steps: the method comprises the steps of controlling the compressor and the electromagnetic expansion valve to be opened, and controlling the fresh air fan to repeatedly execute preset actions, wherein the preset actions comprise: and stopping the fourth preset time after the third preset time is controlled to run, so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
6. A control method of an air conditioner, comprising:
determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature;
calculating a first temperature difference between the indoor environment temperature and the outdoor environment temperature;
controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value;
Acquiring the set temperature of the air conditioner, and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value when the current operation mode of the air conditioner is the refrigeration mode, wherein the method comprises the following steps:
when the first temperature difference exceeds a first preset temperature threshold, controlling a self-cleaning function of the fresh air heat exchanger to be started, starting a compressor, controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to stop so as to introduce fresh air from the outside through a fresh air pipeline;
when the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the air conditioner set temperature;
when the first temperature difference value does not exceed the second preset temperature threshold value, the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the relation between the indoor environment temperature and the air conditioner set temperature, wherein the first preset temperature threshold value is larger than the second preset temperature threshold value.
7. The method according to claim 6, wherein controlling the operating states of the electromagnetic expansion valve, the fresh air heat exchanger, and the fresh air system according to the relationship between the indoor environment temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, comprises:
calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature;
when the second temperature difference exceeds a third preset temperature threshold, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from outdoors through the fresh air pipeline;
when the second temperature difference value is between a fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline;
when the second temperature difference value does not exceed the fourth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, after the compressor operates for a second preset time, the fresh air system is controlled to be opened, and fresh air is introduced from outdoors through the fresh air pipeline, wherein the third preset temperature threshold value is larger than the fourth preset temperature threshold value.
8. The control method of an air conditioner according to claim 6, wherein when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started, and after the compressor is started for a first preset time, controlling the compressor to be stopped to introduce fresh air from outdoors through the fresh air duct, comprising:
calculating a second temperature difference between the indoor environment temperature and the air conditioner set temperature;
when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened so as to introduce fresh air from the outside through the fresh air pipeline;
when the second temperature difference exceeds the fifth preset temperature threshold, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be opened, the compressor is started, and after the third preset time, the fresh air system is controlled to be opened, so that fresh air is introduced from the outside through the fresh air pipeline.
CN202210427402.4A 2022-04-22 2022-04-22 Air conditioner and control method thereof Active CN114811876B (en)

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CN115235022B (en) * 2022-08-04 2024-03-29 海信（广东）空调有限公司 Air conditioner and fresh air control method thereof
CN115183429B (en) * 2022-08-17 2024-05-10 宁波奥克斯电气股份有限公司 Air conditioner self-cleaning control method and device, air conditioner and storage medium
CN115978758A (en) * 2022-12-30 2023-04-18 海信（广东）空调有限公司 Air conditioner and fresh air control method of air conditioner
CN116026008A (en) * 2023-01-05 2023-04-28 宁波奥克斯电气股份有限公司 Sterilization control method and device for air conditioner and air conditioner

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